Dongguan Yuiyuan Steel Co., Ltd.

China Manufacturer with main products: Plastic Die Steel, Hot Work Steel, Cold Work Steel, Alloy Structural Steel, High Speed Tool Steel

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SAE4140/DIN1.7225 Alloy Steel Round Bar

Payment Terms: L/C, T/T
Update Time: 2014/2/22

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Export Markets: North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe

Quick Details

  • Standard: AISI,ASTM,DIN,GB,JIS
  • Grade: DIN1.7225/SAE4140/GB42crmo, JIS SCM440


SAE4140/DIN1.7225 alloy steel round bar/mould steel/special steel


1. DIN1.7225/SAE4140/GB42CrMo, JIS SCM440 alloy steel round bar

2. Hot rolled or forged condition, annealing or harden, black or milled surface

3. Pre-heat treatment:

Annealing: Heat to 840-860° C, keep 2H, furnace cold, hardness≤ 217HBS

High temperature tempering: Heat to 680-700° C, air cold, hardness ≤ 217HBS

4. Heat treatment:

Normalization: Heating to 840 to 880 ° C, maintenance, furnace cooling to 600 ° C, then in air.

Stress relieving: After rough heat to 500 ° C, maintenance raff. In oven to 400 ° C, then in air.

Hardening: Preheating from 600 to 650 ° C austenitizing

At 840 to 880 ° C, quenching in oil.

Tempering: Heating to 550 - 650 ° C and maintenance regime, again depending on the mechanical


5. Hot rolled technology: EAF+LF+VD

Forged technology: EAF+LF+VD+ESR+Forging +Q T + Machined surface

6. Ultrasonic test standard: SPE1921-GR3, CLASS C/C or D/D

7. Production leadtime: 7~10 days


1. General service industries (petroleum, food, chemical, paper, fertilizer, Fabric, aviation and nuclear)

Fluid, gas and oil transport

2. Pressure and heat transmission

3. Construction and ornament

4. Boiler heat exchangers

Competitive Advantage:

1. Good purity and homogeneity

2. Good machinability(Roughing, grinding and drilling)

3. Good dimensional stability during heat treatment

4. Excellent preparation for nitriding, both ionic and gaseous, induction hardening to increase the

Mechanical properties

5. Competitive price

6. Fast production leadtime

7. All the material are inspected with 3 times to meet the highly standards.

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