ASTM A181 Specification

Forgings, Fasteners, Boltings, Stud Bolts, Screws, Nuts

Scope

ASTM A181 specification covers nonstandard as-forged fittings, valve components, and parts for general service. Forgings made to this specification are limited to a maximum weight of 10 000 lb [4540 kg]. Larger forgings may be ordered to Specification A266/A266M.
Two classes of material are covered, designated as Classes 60 and 70, respectively, and are classified in accordance with their mechanical properties as specified in 6.1.
This specification is expressed in both inch-pound units and SI units. However, unless the order specifies the applicable "M" specification designation (SI units), the material shall be furnished to inch-pound units

Related Specifications of ASTM A181

ASTM A181 Chemical Composition

Element Classes 60 and 70 C, max Mn, max P, max Si S, max
Composition, %  1.10A 0.35  1.10A 0.05  0.10-0.35 0.05
  • (A) Manganese may be increased to 1.65 % max provided the carbon is reduced 0.01 % for each 0.06 % increase in manganese over the limit shown in the table.

ASTM A181 Mechanical Requirements

Class Class 60 Class 70
Tensile strength, min, ksi [MPa] 60 [415] 70 [485]
Yield strength,A min, ksi [MPa] 30 [205] 36 [250]
Elongation in 2 in. [50 mm], min, % 22 18
Reduction of area, min, % 35 24
  • (A) Determined by either the 0.2 % offset method or the 0.5 % extension-under-load method.

ASTM A181 Certifications

  • EN 10204 3.1
  • EN 10204 3.2
  • PED 2014/68/EC
  • MERKBLATT AD 2000 W2/W7/W10
  • API 20 E BSL 1/ BSL 2
  • NACE MR 0175
  • NACE MR 0103

ASTM A181 Supplementary Requirements

S1 Carbon Equivalent