Guangzhou Changfeng Steel Co., LTD |
|
SAE5140 40Cr 1.7035 SCR440 Hot Rolled Steel Bar of Special Steel
Chemical composition(%):
Si | Mn | S | P | Cr | Ni | Cu |
0.17-0.37 | 0.70-0.90 | <=0.040 | <=0.035 | 0.70-0.90 | <=0.30 | <=0.30 |
Application:
ASTM5140 is the most commonly used alloy structural steel, tensile
strength, yield strength and hardenability are higher than the 40
steel, but the weldability is limited, there is a tendency to
crack.
ASTM5140 is used for more important quenching and tempering parts,
such as parts under variable load, medium speed and medium load.
Properties:
5140 is medium carbon tempered steel, cold heading die steel.
The steel is moderate in price and easy to process. It can obtain a
certain toughness, plasticity and wear resistance after proper heat
treatment.
Normalizing can promote the spheroidization, improve the cutting
performance of hardness less than 160HBS of blank.
The steel has the best comprehensive mechanical properties at the
temperature of 550~570.
The steel is a high degree of quenching, suitable for high
frequency quenching, flame hardening and other surface hardening
treatment.
Heat treatment specification:
Quenching 850 degree, oil cooling; tempering at 520 degrees C,
water cooling, oil cooling.
Delivery condition:
Hot rolled or forged/ peeled or black surface/annealed or Q+T.
Delivery time:
For abundant stock, 7-15 days.For customized products, 30-50
days.
All the sizes as require can be customerized as fresh production
with MOQ,products of required specifications can be
developed/produced per international, chinese or industry
standards, or based on agreements with customers.
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