1.7225/41CrMo4 Hot Rolled Steel Bar Alloy Round Bar Steel Black/Peeled/Cold Drawn/Turned/QT

1.Grade: AISI 4140, DIN 1.7225/42CrMo4, JIS SCM440, GB 42CrMo

2.Size: dia 10-350mm length 2000-5800mm

3.Chemical composition:(%)

4.Factory state: Hot rolled or forged. Annealed hardness≤229. Black surface.

5.Characteristic: This steel has good workability, machining deformation tiny anti-fatigue performance is quite good, is in hardenability steel. 4140 after heat treatment, good strength and good mechanical properties, good technology, and high-yield.

6.Application: Can also be used for the manufacturing requirements compared 35CrMo steel higher strength and a larger cross-section forgings quenched, such as the traction with a large gear, the transmission gears of the turbocharger, the rear axle, by the load greatly rod and colletbelow 2000m deep oil drill pipe joints and fishing tools, and can be used to mold bender.

7.Process flow: Electric arc furnace melting→Refining furnace → Vacuum treatment furnace → Cast ingot → Steel ingot anneal → Heating → High-speed forging,refining forging → Anneal,retarded cooling,air cooling → Quenching and tempering tretment → Finishing operation → Text → Finished products

8.MECANICAL PROPERTIES Heat Treated Condition

Yield strength ( Rp0.2): 930(max)

Tensile (Rm): 1088(max)

Elongation (A5) %: 13(min)

Charpy Impact J: 42(min)

Hardness HB:248 - 302 HB

 We, Shanghai Unite Steel are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.

In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china, such as: DAYE Special Steel-a famous steel enterprise with the longest steelmaking history; BAO Steel, and Dongbei Special Steel Group-the biggest special steel manufacturer; TPCO, VALIN-largest seamless steel tube production enterprise; What's more, we have built long, deep and close business relationship with dozens of steel companies, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!