ASTM A194 2H

ASTM A194 Standard Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both

Grade Symbol: 2H

Material: Carbon

Chemical Requirements (Composition, %)

C: ≥0.40

Mn: 1.00

P: ≤0.040

S: ≤0.050

Si: 0.40


Hardness Requirements

TypeBrinell HardnessRockwell Hardness
to 1-1/2 in. or M36, incl248 to 32724 to 35
over 1-1/2 in. or M36212 to 32735 max95 min


Minimum Tempering Temperature, [°C] 455