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40Cr Alloy Steel Plate JIS Scr440 ASTM 5140 DIN1.7045 Steel Plate Cutting

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40Cr Alloy Steel Plate JIS Scr440 ASTM 5140 DIN1.7045 Steel Plate Cutting

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Brand Name : Bao Steel

Model Number : 40Cr Scr440

Certification : ISO MTC SGS

Place of Origin : China Jiangsu

MOQ : 500KGS

Price : 850 USD/Ton

Payment Terms : L/C, T/T

Supply Ability : 50000Tons

Delivery Time : 14 days after Received the Deposit

Packaging Details : Export Packing

Application : construction,Boiler Plate

Technique : Hot Rolled

Surface treatment : Black

Standard : ASTM

Length : 1000-12000mm

Type : Steel Plate

Width : 1000mm-2000mm

Special use : High-strength Steel Plate,Alloy structual steel

Grade : 40Cr Scr440

Thickness : 1.2mm-400mm

Material : Alloy Steel Plate

Shape : steel plate/steel sheet/ steel flat bar

Price term : CIF,CFR

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40Cr steel is a kind of Chinese GB standard alloy steel for engineering and machinery purpose, and one

of the most widely used steel grades. For 40Cr material hardness, specifications and equivalent,

please see the table below.

After quenching and tempering treatment, 40Cr steel has good comprehensive mechanical properties,

low temperature impact toughness, low notch sensitivity, good hardenability, and high fatigue strength

in cold oil. When water cooling, the complicated shape of the parts is prone to cracks, the cold bending

plasticity is medium, and the cutting workability after normalizing is good, but the weldability is poor,

should be preheated before welding, and is generally used in the state of quenching and tempering.

40Cr Steel Chemical Composition

Chemical Composition (%)
Grade C % Si Mn Cr
40Cr 0.37 – 0.44 0.17 – 0.37 0.5 – 0.8 0.80 – 1.10

Mechanical Properties of 40Cr Alloy Steel

  • Tensile strength: ≥810 N/mm2 (When actual hardness 25 HRC)
  • Yield strength: ≥785 N/mm2
  • Elongation after break: ≥9%
  • Rate of reduction in area: ≥45%
  • Impact absorbing energy: ≥47 J
  • Material Brinell hardness: ≤207 (annealing or high temperature tempering state)
  • Sample size: 25mm

Heat treatment specification

  • First quenching heating temperature: 850 °C (Cooling: oil)
  • Tempering heating temperature: 520 °C

Equivalent grades of 40Cr Material

40Cr steel equivalent to US ASTM AISI, European Germany DIN EN, British BS EN, France NF EN, Japanese JIS and ISO standard.

Equivalent (For reference)
China USA Germany Japan France UK ISO
Standard Grade Standard Grade Standard Grade (Steel number) Standard Grade Standard Grade Standard Grade Standard Grade
GB/T 3077 40Cr AISI or
ASTM A29/A29M
5140 DIN EN 10083-3 41Cr4 (1.7035) JIS G4104 SCr440 NF EN 10083-3 41Cr4 (1.7035) BS EN 10083-3 41Cr4 (1.7035) ISO 683-1 41Cr4

Applications of 40Cr material

After 40Cr alloy steel quenching and tempering treatment, it is used to manufacture medium-speed, medium-load parts such as machine gears, shafts, worms, spline shafts, thimble sleeves, etc.

After quenching and tempering and high-frequency surface quenching, it is used to manufacture high-hardness, wear-resistant parts such as gears, shafts, spindles, crankshafts, sleeves, pins, connecting rods, screws, nuts, intake valves, etc.

After quenching and medium temperature tempering, it is used to manufacture heavy-duty, medium-speed impact parts such as oil pump rotors, sliders, gears, spindles, collars, etc.

After quenching and low temperature tempering, it is used to manufacture heavy-duty, low-impact, wear-resistant parts such as worms, spindles, shafts and collars.

After carbonitriding treatment, it is used to manufacture transmission parts with large size and high low temperature impact toughness, such as shafts and gears.

40Cr Alloy Steel Plate JIS Scr440 ASTM 5140 DIN1.7045 Steel Plate Cutting40Cr Alloy Steel Plate JIS Scr440 ASTM 5140 DIN1.7045 Steel Plate Cutting40Cr Alloy Steel Plate JIS Scr440 ASTM 5140 DIN1.7045 Steel Plate Cutting


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