680

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#680

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

Datasheet for: Steel Grades:High Alloy: 680

Category	Type	Steel Grade
Steel Grades	High Alloy	680
		S66220
		663
		664
		N09979
		665
		S66545
		670
		R30605
		671
		R30816

Chemical composition(mass fraction)(wt.%) of the 680

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
00.10	0.60	0.65			21.50	...
Mo	Al	Cu	Nb	Ti	V	Ce
9.00
N	Co	Pb	B	Other	Approximate rnumbe
	1.50			W 0.60 Fe 18.50	Hastelloy X

Mechanical Properties of steel grade 680

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)
492 (≥)	463 (≥)	14	33	42	Solution and Aging, Annealing, Ausaging, Q+T,etc	414

Physical Properties of steel grade 680

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
42	-	-			0.13	-
118	569	-	24.3	212		-
482	-	42	44.2			314	242

Heat Treatment of steel grade 680

Heat treated : 1252°C - 1371°C

Technological Curves of steel grade 680

No Curve

Cross Reference Table (Equivalent Grade) of 680

Grade	Standard	Country	Application
AISI 680	AISI	USA	precipitation hardening
419680			The Czech republic tool steel

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680