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201, SiHai Commecial Building,JingHai Road, ChangAn town,
DongGuan City, GuangDong Provice, China
Tel: +86-769-89878426
Fax: +86-769-89026617
QQ: 2602986054
Email: eric@ruiyuansteel.com
Skype: eric-xiangdy;
MSN:eric-xiangdy@hotmail.com |
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| 42CrMo alloy steel round bar |
Alloy Steel Flat Bar SAE4140
1.1.7225/SAE4140/GB42CrMo, JIS SCM440 alloy steel plate
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 properties
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
Applications:
General service industries (petroleum, food, hemical, paper, ertilizer, Fabric, aviation and nuclear)
Fluid, gas and oil transport
Pressure and heat transmission
Construction and ornament
Boiler heat exchangers
Competitive Advantage:
Good purity and homogeneity.
Good machinability(Roughing, grinding and drilling).
Good dimensional stability during heat treatment.
Excellent preparation for nitriding, both ionic and gaseous, induction hardening to increase the mechanical properties.
Competitive price
Fast production leadtime
All the material are inspected with 3 times to meet the highly standards |
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