42CrMo 65mnsteel Rod
Shandong Huamin Steel Ball Joint-stock Co., Ltd.- Materials：304
- Certification：ISO, GS
- Applications：Oil
- Shape：Round
- Specifications：20
- Standard：Standard
Base Info
- Model NO.：20-150
- Specification：1000kg
- Trademark：huamin
- Origin：China
- HS Code：7326110000
- Production Capacity：100000ton,Year
Description
Take the 120MM-140MM diameter heat-treated rod mill steel rod as an example: the wear resistance of the 42CrMo steel rod is about 1.3-1.5 times that of 40Cr, but the price is only about 1.1 times that of it. Material that looks cheap. The price of the two materials is generally around 400.
Let us popularize the standards for heat-treated steel bars:
skills requirement
Relevant standard: YB/T4550-2016
The raw materials of the steel bars are high-quality special steels from well-known steel mills, and the internal inclusions and cracks meet the national standards.
The steel bar should have sufficient hardness: HRC45-55, check the surface hardness. Hot rolling and quenching of steel bars
Special industrial straightening of steel bars, non-straightness ≤ 3/1000, broken bar rate ≤ 3%Steel rod length tolerance +0mm, -20mm
The length of the steel bar should be hot sawed. If it is not hot sawed, use a grinding wheel or a cutting machine to cut both ends of the bar to a suitable length.
The steel rod shall have sufficient wear resistance and shall not have defects such as cracks, blemishes and distortions.
There are no burrs and cracks on the surface of the steel rod. It has high hardness, good mechanical properties and excellent quality of wear resistance and non-deformation.
Steel rod material chemical composition:Just follow the national standard composition of 40Cr or 42CrMo
(10), mechanical properties requirements:
Impact toughness KU2(J)≥12J, hardness: HRC45-55
Again, pay special attention to two issues:
Many manufacturers quote 42CrMo material to customers, and actually supply 40Cr steel bars (manufacturers are required to provide the original material list of the steel mill)
There are also manufacturers who deceive customers and actually deliver round bars, saying that they are heat-treated steel bars. I would like to remind everyone that heat-treated steel bars can actually be observed with the naked eye. There are obvious quenching rings at both ends of the steel bars. steel.