A194 Grade 7M - ASTM A194/A194M-2026

Grade	A194 Grade 7M
Corresponding Standard	ASTM A194/A194M-2026 Standard Specification for Carbon Steel, Alloy Steel, and Stainless Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both
Classification	Alloy Steel

A194 Grade 7M Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo
Minimum Value	0.38	0.15	0.75	-	-	0.8	0.15
Maximum Value	0.48	0.35	1	0.035	0.04	1.1	0.25

* Typical steel compositions used for this grade include 4140, 4142, 4145, 4140H, 4142H, and 4145H.
* Do not intentionally include bismuth (Bi), selenium (Se), antimony (Sb), or lead (Pb).
* Because of the degree to which sulfur segregates, product analysis for sulfur over 0.060 % max is not technologically appropriate.

A194 Grade 7M Mechanical Properties

product	Heat Treatment or Condition	Hardness HBW
Finished Nuts	Heat Treatment	159~235HBW 84~99HRB
Sample nut	Heat Treatment	≥159HBW ≥84HRB

A194Grade7M Corresponding Standards(Same grade name, different standards)

1	ASTM A194/194M-2016
	A194 Grade 7M
2	ASTM A194/A194M-2020
	A194 Grade 7M
3	ASTM A194/A194M-2023
	A194 Grade 7M
4	ASTM A194/A194M-2026
	A194 Grade 7M

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!