ASTM grade 5140 is one structural alloy steel grade in ASTM A29 standard for general application. 5140 steel plate is widely used in low and moderately stressed parts for vehicles, engines and machines where hard, wear resisting surface is needed. We are professional 5140 plate & round bar supplier and we keep wide size range for 5140 plate in stock for immediate shipment. Contact us for any AISI 5140 plate material request and best 5140 grade steel price.

Product Name	Carbon Steel Bar
Diameter	5.0mm-800mm
Length	5800,6000 or customized
Surface	Black skin，Bright，etc
Material	S235JR,S275JR,S355JRS355K2,A36,SS400,Q235,Q355,C45, ST37,ST52,4140,4130,4330,etc
Standard	GB,GOST,ASTM,AISI,JIS,BS,DIN,EN
Technology	Hot rolling, Cold drawing, Hot forging

Competitive Advantage for AISI 5140 material steel plate:

Available in stock for immediate shipment
High strength,
High tenacity
Good hardenability
High resistance to thermal properties.
Competitive price

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.

Technical data

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.

If you have queries about the 5140 specs, or any questions about the 5140 vs 4130, 5140 vs 4340 etc, please contact us for technical support any time.

Warehouse Storage

Our major products including Carbon Steel Plate, Carbon Steel Coil, Carbon Steel Pipe, Carbon Steel Bar, Stainless steel plate,Stainless steel coil , Stainless steel pipe, color coated coil, color tile,galvanized sheet, galvanized coil, Galvanized roofing, galvanized zinc,etc.

Packing And Shipping

For the steel industry, customer care is not just quality control,ontime delivery and offering good price, but also adding value through the services we provide. We work with customers to continuously improve steel quality to help customers obtain more efficient and effective manufacturing processes.Xinzhonglian Steel is also the only company that promises to take back products if they are not up to standard.

Honor

We have passed "ISO9001 quality system certification, and EU CE certification". Welcome to visit our factory to discuss, we hope to establish a long-term cooperative relationship with you.

Steel Round Bars