Application of tempering steel
Medium carbon tempering steel:
on behalf of the steel C30.C35.C40.C45.It also have ML30.ML35.ML40. ML45. A more stable room temperature performance, used for small and medium-sized structural parts, fasteners, transmission shaft, gear, etc.
Manganese steel
on behalf of the steel 40Mn2, 50Mn2.Have superheat sensitivity, high temperature tempering brittleness. water quenching easy to crack. hardenability is higher than carbon steel.
Silicon manganese steel
On behalf of the steel 35SiMn, 42SiMn.High fatigue strength. decarburization、 overheating sensitivity&temper brittleness.It is used to manufacture gear, shaft, rotary shaft. connecting rod and worm with medium speed and high load but little impact. It can also manufacture fasteners under 400℃.
Boron steel
On behalf of steel 40B. 45B. 50BA. ML35B.Hardenability is high, comprehensive mechanical properties are higher than carbon steel, and 40Cr is suitable for the manufacture of small section size of parts, fasteners, etc.
Manganese boron steel
On behalf of the steel 40MnB.Hardenability slightly higher than 40Cr. high strength, toughness and low temperature impact toughness, temper brittleness.40MnB is often used to replace 40Cr,it make large-section parts and 40CrNi to make small parts.45MnB replaces 40Cr and 45Cr.45Mn2B replaces 45Cr ,parts of 40CrNi and 45CrNi as important shafts, and ML35 MnB is also used for fastener production.
Manganese vanadium boron steel
On behalf of the steel 20 MnVB, 40MnVB.
Tempering performance and hardenability is better than 40Cr.overheating tendency is small, there is temper brittleness.It is often used to replace 40Cr.45Cr.38CrSi. 42CrMo4 and 40CrNi in the manufacture of important tempering parts.
Manganese tungsten boron steel
On behalf of the steel 40MnWB.Good low temperature impact performance, no tempering brittleness.Similar to 35CrMo and 40CrNi, it is used to manufacture parts under 70mm.
Silicon, manganese, molybdenum and tungsten steel:
on behalf of the steel type 35SiMn2MoW.
It has high hardenability. Calculated by 50% martensite, the water quenching diameter is 180, and the oil quenching diameter is 100.The tendency of quenching cracking ,and the tempering brittleness are small.High strength and high toughness.It can replace 35CrNiMoA, 4340, used to manufacture large section, heavy load shaft, connecting rod and bolt.
Silicon manganese molybdenum tungsten vanadium steel
On behalf of the steel type 37SiMn2MoWVA.Water quenching diameter 100, oil quenching diameter 70.Good tempering stability, low temperature impact toughness, high temperature strength, low tempering brittleness, used for manufacturing large section of shaft parts.
Chrome steel
Represented by 40Cr and ML40Cr.Good hardenability, water quenching 28-60mm, oil quenching 15-40mm.High comprehensive mechanical properties, good low temperature impact toughness, low notch sensitivity, temper brittleness.Used for manufacturing shaft, connecting rod, gear and bolt.
To be continued
Ms Sharon Wan
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Tel: 0086-769-23190193
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Email: Sharon@otaisteel.com
