AISI/SAE L4

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Description

AISI/SAE L4 Tool Steel and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Tool Steel: AISI/SAE L4

Category	Type	Steel Grade
Steel Grades	Tool Steel	AISI/SAE L4
		ASTM L2
		UNS T61202
		ASTM L3
		UNS T61203
		AISI/SAE L6
		UNS T61206
		AISI/SAE A11
		UNS T30111
		AISI/SAE L1
		UNS T61201

Chemical composition(mass fraction)(wt.%) of the AISI/SAE L4

C ≤	Si ≤	Mn ≤	P ≤	S ≤	Cr	Ni
0.9-1.1	0.1-0.4	0.5-0.7			1.45-1.55
Mo	Al	Cu	Nb	Ti	V	Ce
					0.2-0.3
N	Co	Pb	B	Other

Mechanical Properties of steel grade AISI/SAE L4

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)
436 (≥)	636 (≥)	22	11	33	Solution and Aging, Annealing, Ausaging, Q+T,etc	214

Physical Properties of steel grade AISI/SAE L4

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
21	-	-			0.32	-
573	456	-	44.3	132		-
429	-	42	41.2			423	414

Heat Treatment of steel grade AISI/SAE L4

Heat treated : 1723°C - 1997°C

Technological Curves of steel grade AISI/SAE L4

No Curve

Cross Reference Table (Equivalent Grade) of AISI/SAE L4

Grade	Standard	Country	Application
Q195		China	Engineering and welding
Q215		China	Engineering and welding
Q215 B		China	Engineering and welding
Q235		China	Engineering and welding
Q235 B		China	Engineering and welding
Q235 C		China	Engineering and welding
Q235 D		China	Engineering and welding
Q255 A		China	Engineering and welding
Q255 B		China	Engineering and welding
Q275		China	Engineering and welding
Q235q C		China	Bridge structure with steel
Q235q D		China	Bridge structure with steel
Q345q E		China	Bridge structure with steel
Q345q C		China	Bridge structure with steel
ASTM 1030	ASTM	USA	General use carbon steel bar
UNS G10300	UNS	USA	General use carbon steel bar
ASTM 1005	ASTM	USA	General use carbon steel bar
UNS G10050	UNS	USA	General use carbon steel bar
ASTM 1006	ASTM	USA	General use carbon steel bar
UNS G10060	UNS	USA	General use carbon steel bar

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