5140 Steel Plate 1.7035 41Cr4 SCr440 Alloy Steel

AISI 5140 Alloy steel, we can supply the round bar, steel flat bar, plate, hexagonal steel bar and steel square block. AISI 5140RH steel Round bar can be saw to your required lengths as one offs or multiple cut pieces. And AISI 5140 alloy steel Rectangular pieces can be saw from flat bar or plate to your specific sizes.

1. Supply Range of AISI/ASTM 5140 Round Bar: diameter 20mm – 300mm Steel Plate and Steel Block: thickness 10-200mm x width 300-2000mm 10-80mm thickness 5140 plate are available all the time in stock, 90-200mm thickness plate to be newly production in 15-30 days lead time. Surface Finish: Black Surface, Milled Surface or Polished Surface as per given requirements.

2. Relevant AISI 5140 Specification and Equivalent Steel Grades

Country	USA	German	Japan
Standard	ASTM/AISI A29	EN 10083-3	JIS G4053
Grades	5140	41Cr4	SCr440

3. ASTM 5140 Material Chemical Composition and Equivalent

Standard	Grade/Steel Number	C	Mn	P	S	Si	Cr	Ni
ASTM A29	5140	0.38-0.43	0.70-0.90	≤0.035	≤0.040	0.15-0.35	0.70-0.90	–
EN 10083-3	41Cr4 / 1.7035	0.38-0.45	0.60-0.90	≤0.025	≤0.035	≤0.40	0.90-1.20	–
JIS G4053	SCr440	0.38-0.43	0.60-0.90	≤0.030	≤0.030	0.15-0.35	0.90-1.20	≤0.25

4. AISI 5140 Steel Properties

Property	Value in metric unit		Value in US unit
Density	7.872 *10³	kg/m³	491.4	lb/ft³
Modulus of elasticity	205	GPa	29700	ksi
Thermal expansion (20 ºC)	12.6*10-6	ºCˉ¹	7.00*10-6	in/(in* ºF)
Specific heat capacity	452	J/(kg*K)	0.108	BTU/(lb*ºF)
Thermal conductivity	44.7	W/(m*K)	310	BTUin/(hrft²*ºF)
Electric resistivity	2.28*10-7	Ohm*m	2.28*10-5	Ohm*cm
Tensile strength (annealed)	572	MPa	83000	psi
Yield strength (annealed)	293	MPa	42500	psi
Elongation (annealed)	29	%	29	%
Hardness (annealed)	85	RB	85	RB
Tensile strength (normalized)	793	MPa	115000	psi
Yield strength (normalized)	472	MPa	68500	psi
Elongation (normalized)	23	%	23	%
Hardness (normalized)	98	RB	98	RB

5. Forging of 5140 Alloy Steel Hot forming temperature: 1050-850℃.

6. ASTM 5140 Steel Heat Treat
Soft Annealing
Heat to 680-720℃, cool slowly. This will produce a maximum 5140 hardness of 241HB (Brinell hardness).

Noramlizing of steel grade 5140
Temperature: 840-880℃.

Hardening of 5140 forged steel
Harden from a temperature of 820-850, 830-860℃ followed by water or oil quenching.

Tempering of SAE 5140 material
Tempering temperature: 540-680℃.

7. Applications of AISI Grade 5140
AISI 5140 steel can be used for low and moderately stressed parts for vehicles, engines and machines where hard, wear resisting surface is needed. Hardness as surface hardened about 54 HRC. SAE 5140 steels can also be for marine engineering industry, chemical processing plants, boiler & pressure vessels, nuclear power plants etc.