The hardness of carbon steel heat treatment and standard (United States)

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Steel grade(ASTM)	HBS		Heat treatment			Quenching hardness ≥HRC
Steel grade(ASTM)	Annealing	Hard drawn	C %	Quenching temperature ℃	Cooling medium	Quenching hardness ≥HRC
W1	202	241	0.70～0.85	802	Brine	64
W1	202	241	0.85～0.95	802	Brine	65
W1	202	241	0.95～1.50	788	Brine	65
W2	202	241	0.85～0.95	802	Brine	65
W2	202	241	0.95～1.50	788	Brine	65
W5	202	241	1.05～1.15	802	Brine	65