ASTM standards issued by ASTM International define material chemistry, mechanical properties and test methods for fasteners used in North American projects — structural steel, oil & gas, power and general industry.

ASTM to GB & ISO Equivalents

• ASTM A307 ≈ GB/T 5780 (Grade C) — Low carbon steel bolts
• ASTM A325/F3125 ≈ GB/T 1228 (10.9S) — High strength structural bolts
• ASTM F593/F594 ≈ GB/T 3098.6 — Stainless steel bolts & nuts
• ASTM A563 ≈ GB/T 6170 — Carbon steel nuts

Popular ASTM Standard Numbers

Carbon & Alloy Steel

• ASTM A307 — Carbon steel bolts, studs and threaded rod (Grades A & B)
• ASTM A325 — Structural bolts, steel, heat treated (Type 1/3)
• ASTM A490 — Structural bolts, alloy steel, heat treated
• ASTM A354 — Quenched and tempered alloy steel bolts (Grades BC/BD)
• ASTM A449 — Quenched and tempered steel bolts and studs
• ASTM A193 — Alloy and stainless steel bolting for high temperature (B7, B8)
• ASTM A194 — Carbon and alloy steel nuts for high pressure (2H, 8M)
• ASTM F3125 — High strength structural bolts (A325 & A490 replacement)

Stainless Steel

• ASTM F593 — Stainless steel bolts, screws and studs
• ASTM F594 — Stainless steel nuts
• ASTM A320 — Alloy steel bolting for low temperature (L7)
• ASTM B8/B16 — (commonly referenced with F593)

Washers

• ASTM F436 — Hardened steel washers for structural joints
• ASTM F844 — Washers, steel, plain (flat)
• ASTM F959 — Compressible washer-type direct tension indicators
• ASTM A563 — Carbon and alloy steel nuts
• ASTM F606 — Standard test methods for mechanical properties of fasteners