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#318

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

Datasheet for: Steel Grades:High Alloy: 318

Category	Type	Steel Grade
Steel Grades	High Alloy	318
		254SMO
		300M
		302HQ-FM
		303Al Mod
		304HN
		304SCQ
		316SCQ
		317LM
		317L4
		307

Chemical composition(mass fraction)(wt.%) of the 318

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.08	1.00	2.00	0.045	0.030	17.0-19.0	13.0-15.0
Mo	Al	Cu	Nb	Ti	V	Ce
1.75-2.75
N	Co	Pb	B	Other

Mechanical Properties of steel grade 318

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)
548 (≥)	527 (≥)	33	43	44	Solution and Aging, Annealing, Ausaging, Q+T,etc	324

Physical Properties of steel grade 318

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
34	-	-			0.33	-
979	528	-	44.3	114		-
828	-	24	41.2			334	314

Heat Treatment of steel grade 318

Heat treated : 1426°C - 1964°C

Technological Curves of steel grade 318

No Curve

Cross Reference Table (Equivalent Grade) of 318

Grade	Standard	Country	Application
1.3318	DIN	Germany	High-speed tool steel
S31803	UNS	USA	Dual-phase steel
S31803	UNS	USA	Dual-phase steel
318S17			austenitic special steel
1.4318	AFNOR	France	Austenite
413180			The Czech republic Structural steel
13180			The Czech republic Structural steel

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Rfq.: sales@longhaisteel.com

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318