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681 High Alloy and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:High Alloy: 681

Category	Type	Steel Grade
Steel Grades	High Alloy	681
		664
		N09979
		665
		S66545
		670
		R30605
		671
		R30816
		680
		N06002

Chemical composition(mass fraction)(wt.%) of the 681

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.05	0.12	0.24			12.50	42.50
Mo	Al	Cu	Nb	Ti	V	Ce
6.00	0.20			2.50
N	Co	Pb	B	Other	Approximate rnumbe
			0.015	Fe...	Incoloy901

Mechanical Properties of steel grade 681

Yield R_p0.2 (MPa)	Tensile R_m (MPa)	Impact KV/Ku (J)	Elongation A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
961 (≥)	871 (≥)	34	11	24	Solution and Aging, Annealing, Ausaging, Q+T,etc	224

Physical Properties of steel grade 681

Temperature (°C)	Modulus of elasticity (GPa)	Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and	Thermal conductivity (W/m·°C)	Specific thermal capacity (J/kg·°C)	Specific electrical resistivity (Ω mm²/m)	Density (kg/dm³)	Poisson’s coefficient, ν
44	-	-			0.11	-
757	467	-	42.3	322		-
387	-	44	23.2			234	321

Heat Treatment of steel grade 681

Heat treated : 1814°C - 1897°C

Technological Curves of steel grade 681

No Curve

Cross Reference Table (Equivalent Grade) of 681

Grade	Standard	Country	Application
AISI 681	AISI	USA	precipitation hardening

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Rfq.: sales@longhaisteel.com

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681