A194 Grade 43 - ASTM A194/A194M-2023

Grade	A194 Grade 43
Corresponding Standard	ASTM A194/A194M-2023 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 43 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Mo
Minimum Value	0.38	0.15	0.6	-	-	0.7	1.65	0.2
Maximum Value	0.43	0.35	0.85	0.035	0.04	0.9	2	0.3

A194 Grade 43 Mechanical Properties

product	Heat Treatment or Condition	Hardness HBW
Finished Nuts	Heat Treatment	248~327HBW 24~35HRC
Sample nut	Heat Treatment	≥201HBW ≥94HRB

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