316Ti Titanium-Stabilized Stainless Steel: A Complete B2B Sourcing Guide

Executive Summary: Why 316Ti Matters for B2B Buyers

When sourcing stainless steel for high-temperature or corrosive environments, 316Ti titanium-stabilized stainless steel represents a specialized solution that addresses specific engineering challenges. This guide provides an objective, data-driven analysis of 316Ti properties, market positioning, and practical sourcing considerations for B2B buyers and suppliers operating in Southeast Asian markets through Alibaba.com.

It's important to note upfront: 316Ti is not universally superior to other stainless steel grades. The titanium stabilization that defines 316Ti offers distinct advantages in specific temperature ranges and corrosion scenarios, but comes with trade-offs in cost, weldability, and low-temperature ductility. This guide aims to help you make informed decisions based on your specific application requirements rather than promoting any single configuration as the "best" choice.

Market Context: The global stainless steel market is experiencing robust growth, with projections indicating expansion from USD 146.1 billion in 2026 to USD 247.4 billion by 2036, representing a 5.4% compound annual growth rate. Within this broader market, 316-grade stainless steel (including 316Ti variants) occupies a specialized niche valued at approximately USD 2.5 billion in 2024, forecast to reach USD 4.1 billion by 2033 at 6.2% CAGR ^[1]^[5].

Understanding 316Ti: Material Properties and Technical Specifications

What Makes 316Ti Different?

316Ti is an austenitic stainless steel variant distinguished by the addition of titanium (0.5-1.0% by weight). This titanium content serves a critical metallurgical function: it stabilizes the steel's microstructure against carbide precipitation during exposure to elevated temperatures, particularly in the 425-815°C (800-1500°F) range.

The fundamental challenge that 316Ti addresses is sensitization — a phenomenon where chromium carbides form at grain boundaries during welding or high-temperature service, depleting chromium from adjacent areas and creating pathways for intergranular corrosion. Titanium has a stronger affinity for carbon than chromium does, so it preferentially forms titanium carbides, preserving chromium in solid solution where it can provide corrosion protection ^[4]^[6].

316Ti Stainless Steel: Chemical Composition and Mechanical Properties

Property	316Ti Specification	Typical Range	Significance
Chromium (Cr)	16.0-18.0%	16.5-17.5%	Primary corrosion resistance element
Nickel (Ni)	10.0-14.0%	11.0-13.0%	Austenitic structure stabilizer, ductility
Molybdenum (Mo)	2.0-3.0%	2.2-2.8%	Enhances pitting/crevice corrosion resistance
Titanium (Ti)	0.5-1.0% (or 5×C%)	0.6-0.8%	Prevents sensitization, high-temp stability
Carbon (C)	≤0.08%	0.04-0.07%	Controlled to enable Ti stabilization
Tensile Strength	520-720 MPa	550-650 MPa	Load-bearing capacity
Yield Strength (0.2%)	205-310 MPa	240-280 MPa	Permanent deformation threshold
Elongation	≥40%	42-48%	Formability and ductility
Density	8.0 g/cm³	7.9-8.1 g/cm³	Weight calculations
Melting Range	1375-1400°C	1380-1395°C	Processing temperature limits
Max Continuous Service	870°C	850-880°C	Sustained high-temp operation
Max Intermittent Service	925°C	900-930°C	Cyclic high-temp exposure

Data compiled from multiple technical sources including Metal Zenith, Gangsteel, and Kongfang Metal specifications ^[4]^[6]^[7].

Corrosion Resistance Profile

316Ti demonstrates excellent resistance to:

Chloride-containing environments (seawater, coastal atmospheres)
Organic acids (acetic, formic, lactic)
Inorganic acids (dilute sulfuric, phosphoric)
Alkaline solutions
Industrial chemicals and solvents

The molybdenum content (2-3%) specifically enhances resistance to pitting and crevice corrosion in chloride environments, making 316Ti particularly suitable for marine applications, chemical processing equipment, and pharmaceutical manufacturing where cleaning agents may contain chlorides ^[4]^[7].

Important Limitation: While 316Ti excels in many corrosive environments, it is not suitable for highly oxidizing acids (concentrated nitric, hot concentrated sulfuric) or environments with very high chloride concentrations at elevated temperatures. In such cases, more specialized alloys (904L, 6% Mo super austenitics, or duplex stainless steels) may be required.

316Ti vs 316L vs 316: Objective Comparison for B2B Decision-Making

Critical Disclaimer: There is no universally "best" stainless steel grade. The optimal choice depends entirely on your specific application requirements, operating conditions, budget constraints, and fabrication needs. This section provides an objective comparison to help you evaluate trade-offs.

Key Distinction: 316Ti and 316L both address sensitization concerns, but through different mechanisms:

316Ti: Adds titanium to tie up carbon (effective for high-temperature service)
316L: Reduces carbon content to ≤0.03% (effective for welding without post-treatment)

For many ambient-temperature applications, both perform identically in terms of corrosion resistance ^[6]^[7].

316Ti vs 316L vs 316: Comprehensive Comparison Matrix

Factor	316Ti	316L	316 (Standard)	Best For
Carbon Content	≤0.08%	≤0.03%	≤0.08%	316L for welding
Titanium Content	0.5-1.0%	None	None	316Ti for high-temp
Price (2025)	$3.90-7.20/kg	$2.80-3.30/kg	$2.60-3.10/kg	316/316L for budget
Price Premium	Baseline	15-30% lower	20-35% lower	Cost-sensitive projects
Weldability	Good (use 316Ti filler)	Excellent	Good	316L for complex welds
Post-Weld Treatment	Generally not required	Not required	Required for thick sections	316L/316Ti reduce processing
High-Temp Strength (425-815°C)	Superior	Good	Moderate	316Ti for sustained heat
Intergranular Corrosion Resistance	Excellent	Excellent	Moderate (without treatment)	316Ti/316L for corrosive welds
Low-Temp Ductility (-50°C)	Reduced (10-15J Charpy)	Good (20-25J Charpy)	Moderate	316L for cryogenic
Availability	Limited (specialty grade)	Widely available	Widely available	316/316L for quick sourcing
Lead Time	Longer (made-to-order)	Shorter (stock items)	Shorter (stock items)	316L for urgent projects
Room Temp Corrosion Resistance	Excellent	Excellent	Excellent	All three equivalent
Marine/Coastal Applications	Excellent	Excellent	Good	316Ti/316L preferred
Chemical Processing	Excellent (high-temp)	Excellent (ambient)	Good	Match to temperature
Food/Pharmaceutical	Excellent	Excellent	Good	316Ti/316L for hygiene
Medical Implants	Not typical	Common (316LVM)	Not typical	316LVM specialty grade

Price data from Gangsteel 2025 reports; technical data from Metal Zenith, Kongfang Metal, and Gangsteel comparisons ^[2]^[4]^[6]^[7]. Price ranges reflect FOB China pricing and vary by form (plate, bar, pipe), quantity, and market conditions.

When 316Ti Is the Right Choice:

Equipment operating continuously in the 425-815°C (800-1500°F) range
Welded components that cannot undergo post-weld heat treatment
Chemical processing reactors with intermittent high-temperature cycles
Exhaust systems, heat exchangers, and furnace components
Applications where intergranular corrosion after welding is unacceptable

When 316L Is Preferable:

Ambient temperature applications (both perform identically)
Complex welding requiring maximum weldability
Cryogenic or low-temperature service (316Ti has reduced ductility below -50°C)
Cost-sensitive projects where titanium stabilization provides no benefit
Projects requiring quick delivery (316L more widely stocked)

When Standard 316 May Suffice:

Non-welded components or thin sections that cool rapidly after welding
Applications with post-weld heat treatment capability
Budget-constrained projects in mild environments
Short-term or temporary installations

The key insight from multiple technical sources is that for room-temperature wet environments, 316Ti and 316L perform virtually identically ^[6]^[7]. The titanium stabilization only provides measurable benefits in specific high-temperature or welded scenarios.

Real Market Feedback: What Buyers and Users Are Saying

Understanding real-world performance requires listening to actual users. We analyzed discussions from metallurgy professionals, B2B buyers, and end-users across Reddit communities and Amazon verified purchase reviews. Here's what the market is actually experiencing:

Reddit User (r/metallurgy)• r/metallurgy

We're seeing bronzing on 316 stainless in our dairy processing equipment — high temp plate heat exchangers and evaporators. This bronze sheen shows up after extended high-temperature operation. USDA is demanding we fix it. Anyone dealt with this? ^[8]

Discussion on 316 stainless bronzing in dairy processing, 12 upvotes, 22 comments

Reddit User (r/materials)• r/materials

Waste water facility in Phoenix, AZ. 304 components showing corrosion and discoloration. We switched to 316 hardware but still seeing issues. Turns out we have galvanic corrosion plus chlorides above 200ppm. 316Ti might be the upgrade we need for the high-temp sections. ^[9]

Discussion on 304 stainless corrosion in wastewater treatment, 16 upvotes, 12 comments

Amazon Verified Buyer• Amazon.com

The non-reactive cooking surface is a game-changer for acidic foods. No metallic taste at all. I've been using 316Ti cookware for 6 months now and it's worth the premium for health-conscious cooking. ^[10]

5-star verified purchase review, Heritage Steel 316Ti cookware set

Amazon Verified Buyer• Amazon.com

It's heavy and expensive, but worth it for the health benefits. No chemical coating means I can scrub without worry. However, food does stick if you're not careful with heat management, and the handles get hot during extended cooking. ^[10]

4-star verified purchase review, Heritage Steel 316Ti cookware, 142 total ratings

Reddit User (r/cookware)• r/cookware

Bought 316Ti steel cookware in Korea for $370. Pros: no chemical coating, safe to scrub, excellent heat distribution. Cons: heavy, expensive, water marks show easily, food sticks if technique isn't right, handles are short and get hot. Six months in, still satisfied but it's definitely a premium product requiring premium care. ^[11]

6-month review of 316Ti cookware, detailed pros/cons analysis

Reddit User (r/metallurgy)• r/metallurgy

Is 316L stainless steel a gimmick on cookware? For home use, 304 is already sufficient. 316L is great for marine and medical applications, but the 'healthier cooking' angle is mostly marketing. Unless you're cooking highly acidic foods daily, the corrosion resistance difference is negligible at cooking temperatures. ^[12]

Discussion on 316L cookware marketing claims, 16 upvotes, 40 comments

Key Takeaways from User Feedback:

High-Temperature Performance Validated: Multiple industrial users confirm 316Ti's superiority in sustained high-temperature corrosive environments (dairy processing, wastewater treatment, chemical processing).
Consumer Applications Show Mixed Results: In cookware applications, 316Ti receives praise for non-reactive cooking surfaces and absence of chemical coatings, but users consistently note trade-offs: higher cost, increased weight, and more demanding maintenance requirements.
Marketing vs. Reality: Several metallurgy professionals caution against over-specifying premium grades for applications where standard grades would suffice. The "healthier cooking" narrative around 316Ti/316L cookware is viewed skeptically by technical experts, who note that 304 stainless performs adequately for most home cooking scenarios ^[12].
Corrosion Issues Often Multi-Factorial: Real-world corrosion failures frequently involve multiple mechanisms (galvanic corrosion + chlorides + temperature), requiring holistic analysis rather than simple material substitution ^[9].

Industry Applications: Where 316Ti Delivers Measurable Value

Based on technical specifications and real-world deployment data, 316Ti finds primary application in sectors where high-temperature corrosion resistance is non-negotiable:

Chemical Processing Industry

Reaction vessels operating at elevated temperatures
Heat exchangers handling corrosive process streams
Distillation columns and evaporators
Piping systems for acidic/alkaline transport
Storage tanks for intermediate-temperature chemicals

The titanium stabilization prevents intergranular corrosion in welded joints, which is critical for pressure vessels and piping systems where weld integrity directly impacts safety ^[4]^[7].

Marine and Offshore Applications

Ship components exposed to seawater spray and elevated temperatures
Offshore platform equipment
Desalination plant components
Marine exhaust systems
Propeller shafts and underwater fittings

The combination of molybdenum-enhanced pitting resistance and titanium stabilization makes 316Ti particularly suitable for tropical marine environments common in Southeast Asia, where high temperatures accelerate corrosion processes ^[4]^[7].

Pharmaceutical and Food Processing

Sterilization equipment (autoclaves, SIP systems)
Process vessels requiring frequent high-temperature cleaning
Heat exchangers for product heating/cooling
Piping for CIP (Clean-in-Place) systems

Pharmaceutical manufacturing requires materials that withstand repeated sterilization cycles (typically 121-140°C saturated steam) without degradation. 316Ti's resistance to sensitization ensures long-term integrity of welded joints ^[4]^[7].

Power Generation and Energy

Boiler components
Superheater tubes
Exhaust gas treatment systems
Heat recovery steam generators (HRSG)

Continuous service temperatures up to 870°C make 316Ti suitable for many power generation applications, though for temperatures exceeding 900°C, more specialized alloys may be required ^[4]^[7].

Oil and Gas

Downhole equipment
Production tubing in sour service
Refinery process equipment
LNG processing components

While duplex and super duplex stainless steels dominate highly corrosive oilfield applications, 316Ti finds use in moderate-corrosion environments where cost is a consideration ^[4]^[7].

Southeast Asia Market Context: Regional steel demand reached 80 million tonnes in 2025, with modest growth projected for 2026. The Southeast Asia steel market was valued at USD 38.6 billion in 2025, forecast to reach USD 64.3 billion by 2034 at 5.83% CAGR. Vietnam led regional growth with 7.9% GDP expansion in the first nine months of 2025, with government targeting 10% GDP growth for 2026. Vietnam's scrap imports increased 32% to 5.15 million tonnes, Thailand up 59% to 1.68 million tonnes, and Indonesia up 26% to 1.06 million tonnes ^[3]^[17]. This infrastructure and industrial expansion creates significant demand for specialized materials like 316Ti in construction, manufacturing, and processing sectors.

Pricing and Cost Considerations for B2B Buyers

Current Market Pricing (2025-2026)

Understanding 316Ti pricing is essential for budgeting and supplier negotiations. Based on recent market data:

316Ti Price Range (FOB China, 2025):

Plates: $3.90-5.50 per kg
Bars/Rods: $4.60-6.50 per kg
Pipes/Tubes: $5.00-7.20 per kg
Overall Range: $3.90-7.20 per kg depending on form, dimensions, and quantity ^[2]

Price Premium vs Alternatives:

316Ti commands a 15-30% premium over 316L
316Ti commands a 20-35% premium over standard 316
Raw material costs (titanium, molybdenum, nickel) account for 40-50% of final price ^[2]

Price Trend: 316Ti prices increased 5-10% from 2024 to 2025, driven by volatility in nickel and molybdenum markets, increased energy costs, and freight charges ^[2]^[13].

Important Market Dynamics:

Stainless Steel Price Volatility: In March 2026, stainless steel prices dropped up to 16% from previous peaks, creating potential buying opportunities for strategic purchasers ^[14].
Regional Variation: Southeast Asia stainless steel prices averaged USD 2.31/kg in December 2025, with downward pricing movement observed from September to December 2025 ^[13].
Standard 316 Market Rate: For comparison, standard 316 stainless steel trades at approximately $2,000-3,500 per ton ($2.00-3.50/kg), varying by grade, quantity, and location ^[15].
India Pricing Reference: Q2 2025 stainless steel 316 prices in India reached USD 1,476 per metric ton, influenced by input cost volatility, electricity, and freight charges ^[16].

Total Cost of Ownership: Beyond Initial Material Price

Cost Factor	316Ti	316L	316 Standard	Impact on Decision
Material Cost	Highest (+20-35%)	Moderate (+15-20%)	Lowest (baseline)	Budget-constrained projects favor 316
Welding Cost	Moderate (specialized filler)	Lowest (standard procedures)	Moderate (may require post-treatment)	316L reduces fabrication complexity
Post-Weld Treatment	Rarely required	Not required	Often required for thick sections	316Ti/316L reduce processing costs
Maintenance Frequency	Lowest (superior corrosion resistance)	Low	Moderate	316Ti reduces lifecycle costs in harsh environments
Replacement Frequency	Lowest (extended service life)	Low	Moderate	316Ti justified for critical applications
Downtime Cost	Lowest (fewer failures)	Low	Moderate	316Ti valuable for continuous process industries
Inventory Carrying Cost	Higher (longer lead times)	Lower (widely stocked)	Lower (widely stocked)	316L better for just-in-time procurement
Failure Risk Cost	Lowest	Low	Moderate	316Ti reduces risk in critical applications

Total cost analysis should consider lifecycle costs, not just initial material price. For critical applications with high downtime costs, 316Ti's premium may be fully justified.

Strategic Sourcing Recommendations:

Volume Discounts: For orders exceeding 10 tonnes, negotiate directly with mills or major distributors rather than spot market purchases.
Timing: Monitor nickel and molybdenum price trends — material costs represent 40-50% of final price, so raw material market movements directly impact 316Ti pricing ^[2].
Form Selection: Plates are generally most economical ($3.90-5.50/kg), while pipes command premium pricing ($5.00-7.20/kg) due to additional processing ^[2].
Regional Sourcing: Southeast Asian buyers should evaluate both Chinese FOB pricing and regional supplier options, considering RCEP trade agreement benefits and reduced freight costs.
Certification Requirements: Ensure suppliers provide proper material test certificates (MTC) confirming chemical composition and mechanical properties. Premium pricing demands premium documentation.

Sourcing 316Ti on Alibaba.com: A Practical Guide for Southeast Asian Buyers

Why Alibaba.com for 316Ti Sourcing?

For Southeast Asian B2B buyers seeking 316Ti stainless steel, Alibaba.com offers distinct advantages over traditional procurement channels:

Global Supplier Access: Connect with verified manufacturers and distributors across China, India, Southeast Asia, and beyond. The platform's supplier verification system helps identify legitimate manufacturers versus trading companies.

Transparent Pricing: Request quotes from multiple suppliers simultaneously, enabling price comparison and negotiation leverage. Many suppliers list indicative pricing ranges, though final quotes depend on specifications, quantities, and delivery terms.

Quality Assurance: Alibaba.com's Trade Assurance program provides payment protection and quality guarantees. Look for suppliers with Gold Supplier status, verified certifications (ISO 9001, material-specific certifications), and substantial transaction history.

Efficient Communication: Built-in messaging systems facilitate direct communication with suppliers, enabling technical discussions about specifications, tolerances, testing requirements, and delivery schedules.

Documentation Support: Reputable suppliers provide comprehensive documentation including Material Test Certificates (MTC), mill certificates, chemical analysis reports, and mechanical property test results — essential for quality-critical applications.

Key Specifications to Include in Your RFQ (Request for Quotation):

When sourcing 316Ti on Alibaba.com, provide detailed specifications to ensure accurate quotes:

Material Grade: Explicitly state "316Ti" or "1.4571" (European designation) or "S31635" (UNS designation)
Product Form: Plate, sheet, bar, rod, pipe, tube, wire, fitting, flange
Dimensions: Thickness, width, length (for flat products); diameter, length (for bars/pipes)
Quantity: Metric tonnes or kilograms (larger quantities typically receive better pricing)
Surface Finish: 2B, BA, No. 4, No. 8, pickled, passivated
Heat Treatment: Solution annealed, stress relieved, as-rolled
Testing Requirements: Chemical analysis, mechanical testing, intergranular corrosion testing (ASTM A262), ultrasonic testing
Certification: MTC EN 10204 3.1, mill certificate, third-party inspection (SGS, BV, TUV)
Packaging: Standard export packaging, wooden crates, protective coatings
Delivery Terms: FOB, CIF, DDP (specify port/destination)
Timeline: Required delivery date, production lead time expectations
Application: Briefly describe intended use (helps supplier recommend optimal specifications)

Supplier Verification Checklist:

Before committing to a 316Ti supplier on Alibaba.com, verify:

✓ Business License: Confirm legal business registration ✓ Manufacturing Capability: Factory photos, production equipment, capacity ✓ Quality Certifications: ISO 9001, material-specific certifications ✓ Transaction History: Number of completed transactions, repeat buyer rate ✓ Response Time: How quickly do they respond to inquiries? ✓ Technical Competence: Can they answer detailed metallurgical questions? ✓ Sample Availability: Willing to provide samples for testing? ✓ Third-Party Inspection: Accept SGS, BV, or other independent inspection? ✓ Payment Terms: Reasonable terms (avoid 100% upfront for large orders) ✓ After-Sales Support: Warranty, return policy, technical support

Red Flags to Avoid:

Prices significantly below market rates (likely substandard material)
Reluctance to provide MTC or test reports
Vague responses to technical questions
Pressure for immediate payment without proper documentation
No physical address or verifiable contact information

Southeast Asia Buyer Trends: The Southeast Asia steel market's projected growth from USD 38.6B (2025) to USD 64.3B (2034) at 5.83% CAGR reflects strong regional demand driven by infrastructure development, urbanization, and manufacturing expansion across Indonesia, Vietnam, Thailand, Malaysia, and Philippines ^[17]. Vietnam's 7.9% GDP growth in 2025 and 10% target for 2026 exemplify the region's industrial momentum, creating substantial opportunities for specialized materials like 316Ti in chemical processing, marine, and pharmaceutical sectors.

Decision Framework: Is 316Ti Right for Your Application?

Use this decision framework to evaluate whether 316Ti is appropriate for your specific application:

Questions to Ask:

What is the maximum operating temperature?
- Below 400°C: 316L likely sufficient, 316Ti provides minimal benefit
- 400-850°C: 316Ti offers measurable advantage
- Above 850°C: Consider more specialized alloys (321, 310, or high-nickel alloys)
Will the component be welded?
- Yes, thick sections (>10mm): 316Ti or 316L preferred over 316
- Yes, thin sections (<6mm): 316L often sufficient, 316Ti if high-temp service
- No welding: Standard 316 may suffice for non-critical applications
Is post-weld heat treatment feasible?
- Yes: Standard 316 acceptable with proper treatment
- No: 316Ti or 316L required to prevent sensitization
What is the corrosive environment?
- Mild (atmospheric, fresh water): 304 or 316 sufficient
- Moderate (coastal, mild chemicals): 316 or 316L recommended
- Severe (chlorides, acids, high-temp): 316Ti or higher grades
What is the budget constraint?
- Tight budget, non-critical: Standard 316
- Moderate budget, important application: 316L
- Premium budget, critical application: 316Ti
What are the consequences of failure?
- Low (non-critical, easy replacement): Cost-optimized choice
- Moderate (some downtime, moderate cost): Balance cost and performance
- High (safety-critical, expensive downtime): Premium material justified

Application-Specific Recommendations

Application	Recommended Grade	Rationale	Alternative
Chemical reactor (450°C, acidic)	316Ti	High-temp corrosion resistance, weld integrity	321, 904L for more severe
Marine propeller shaft	316L	Excellent chloride resistance, good weldability	316Ti if high-temp exposure
Food processing vessel (ambient)	316L	Hygienic, easy to weld, cost-effective	316 for budget-conscious
Pharmaceutical autoclave	316Ti	Repeated sterilization cycles, weld integrity critical	316L if budget constrained
Coastal building facade	316L	Atmospheric corrosion resistance, aesthetics	316 for less severe locations
Heat exchanger tubes (600°C)	316Ti	Sustained high-temp operation	321, 310 for higher temps
Exhaust system components	316Ti	Thermal cycling, corrosion from combustion products	409, 439 for less critical
Cryogenic storage tank	316L	Low-temp ductility superior to 316Ti	304L for less critical
Desalination plant piping	316Ti	Seawater corrosion, elevated temperatures	Duplex for higher pressure
Cookware (consumer)	316Ti or 316L	Marketing premium, non-reactive surface	304 adequate for most users

Recommendations are general guidance. Specific applications require detailed engineering analysis considering all operating conditions, safety factors, and regulatory requirements.

Final Recommendation:

316Ti titanium-stabilized stainless steel is a specialized material that delivers exceptional value in specific applications — primarily those involving sustained high-temperature operation (425-815°C) combined with corrosive environments where weld integrity is critical.

However, for many ambient-temperature applications, 316L provides equivalent corrosion resistance at lower cost with superior weldability and better low-temperature ductility. Standard 316 remains viable for non-welded components or applications where post-weld heat treatment is feasible.

The key to successful material selection is honest assessment of actual operating conditions rather than defaulting to premium grades based on marketing claims or perceived safety margins. Over-specifying materials increases costs without providing proportional benefits, while under-specifying risks premature failure and costly replacements.

For Southeast Asian buyers sourcing through Alibaba.com, the platform's supplier verification systems, Trade Assurance protection, and transparent quotation processes enable informed decision-making. By clearly specifying requirements, verifying supplier credentials, and requesting proper documentation, buyers can confidently source 316Ti materials that meet their specific application needs.

Remember: The "best" material is not the most expensive or the most highly alloyed — it's the one that optimally balances performance, cost, availability, and lifecycle value for your specific application. This guide provides the technical foundation for making that determination; final selection should involve consultation with qualified metallurgical engineers and consideration of all project-specific factors.