When sourcing industrial parts and equipment on Alibaba.com, material selection is one of the most critical decisions affecting product performance, longevity, and total cost of ownership. The three most common materials—stainless steel, aluminum, and plastic—each serve distinct market segments with different buyer expectations and use cases.
For Southeast Asian manufacturers looking to sell on Alibaba.com to global B2B buyers, understanding these material differences isn't just technical knowledge—it's a competitive advantage that helps you position products correctly and attract the right buyers.
- Plastic (ABS/Delrin): $2-5/kg
- Aluminum 6061-T6: $3-6/kg
- Stainless Steel 304: $4-8/kg
- Stainless Steel 316: $6-12/kg (20-40% premium over 304)
Stainless Steel represents the premium tier for industrial applications requiring corrosion resistance and structural integrity. Within stainless steel, two grades dominate:
- 304 Grade (18% chromium, 8% nickel): The most common austenitic stainless steel, offering excellent formability and cost-effectiveness for general industrial use. Not recommended for chloride-rich environments.
- 316 Grade (16-18.5% chromium, 10-14% nickel, 2-3% molybdenum): The added molybdenum provides superior resistance to pitting and crevice corrosion, making it essential for marine, chemical processing, and food processing applications [1].
Aluminum (typically 6061-T6 alloy) offers an attractive balance of strength, weight, and cost. With a tensile strength of 310MPa and density approximately one-third that of steel, aluminum is ideal for applications where weight reduction matters without sacrificing structural integrity [2].
Plastic components (ABS, Delrin/acetal, PEEK) dominate entry-level and light-duty products. While tensile strength is significantly lower (Delrin: 69MPa), plastics offer advantages in electrical insulation, chemical resistance to specific agents, and manufacturing cost for high-volume production [2].

