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Fastener Teach

Import vs Domestic Fasteners: Material Standards

Import and domestic fasteners differ in material standards.

Material Standards:

  • Low Carbon: SAE 1018 ≈ C15 ≈ 15#
  • Medium Carbon: SAE 1035 ≈ C35 ≈ 35#
  • Alloy Steel: SAE 4140 ≈ 42CrMo4 ≈ 42CrMo
  • Stainless: 304/316 ≈ A2/A4

Selection Guide:

  1. Export: ASTM or DIN
  2. Domestic: GB standards
  3. High-end: Import brands
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