Steel Cold Rolled Round Bar OD 260mm 40Cr Material ASTM 5140

40Cr Steel Round Bar Hot Rolled Alloy Bar OD 260mm 40Cr Material ASTM 5140 Steel Material Properties

40cr alloy round bar is widely used in the manufacture quenched withstand moderate work load and medium speed mechanical parts , such as automotive steering knuckles, and rear axle gear on the machine shaft , worm , spline shaft , top covers. More informational about 40cr alloy round bar details, please see the following:

40cr alloy round bar details:
Name: 40cr alloy steel
Standard: GB / T 3077-1999

Quenched specifications : quenching temperature 850 ℃ ± 10 ℃, oil cooling ; tempering temperature 520 ℃ ± 10 ℃, water, oil, air cooling.

40cr alloy steel round bar chemical composition (mass fraction,%)

40cr alloy steel round bar mechanical properties:
Blank sample size (mm): 25 Heat treatment : the first quenching temperature (℃): 850; Coolant: Oil

The second quenching temperature (℃):
Tempering heating temperature (℃): 520; Coolant: water, oil tensile strength (σb / MPa): ≧ 980
Yield point (σs / MPa): ≧ 785 Elongation (δ5 /%): ≧ 9
Section shrinkage (ψ /%): ≧ 45 impact energy (Aku2 / J): ≧ 47
Normalizing specifications : Temperature 850 ~ 870 ℃ the hardness of 179 ~ 229HBS.

40cr round bar features: modulation of carbon steel , cold heading die steel. The steel affordable, easily processed, after appropriate heat treatment can be obtained by a certain toughness , ductility and wear resistance. Normalizing can promote tissue ball , improved cutting hardness of less than 160HBS blank . Tempering temperature 550 ~ 570 ℃, the steel has the best mechanical properties. The steel hardenability than 45 steel , suitable for induction hardening , flame quenching surface hardening treatment.

40cr alloy steel round bar usage: After the steel used in the manufacture quenched withstand moderate work load and medium speed mechanical parts , such as automotive steering knuckles, and rear axle gear on the machine shaft , worm , spline shaft , top covers.

we are is a professional 40cr alloy round bar exporter and a steel round bar Stockist in China. Any need in 40cr alloy round bar Chemical Composition and Mechanical Properties, please feel free to contact us by email or calling to us!

Jiangsu Mittel Steel Industrial Limited is  located in Wuxi City,  a beautiful city near Shanghai.  Wuxi is close to  Shanghai (BAO STEEL) ,Zhangjiagang (ZPSS),Ningbo (BAO XIN),KUN SHAN (DKSS), enjoy excellent geographic location and convenient water, land and air transportation. , Wuxi become the biggest  stainless steel sheet ,plate and coil  supply Centers in China. Jiangsu Mittel Steel Industrial Limited was established in 1998 years. as one of the largest stockists and manufacturers of industrial grade Stainless Steel products and derivatives in Wuxi ,We keep a stock of 50000 tons every month, so we can delivery goods in fast time.

Our company supplies cold/hot-rolled stainless steel sheets,stainless steel coils and stainless steel Plate to many steel factories from athome and abroad, including Shanxi Taigang Iron& Steel CO, . Ltd (TISCO)Zhangjiagang Pohang (ZPSS), Shanghai BAO STEEL, Ningbo Baoxin and steel factories in Taiwan area, Mainland Chinese and foreign countries and regions. 

Our long-term business lines are 201.202.304(1.4301).304L.316.316L(1.4404).430.409L, 309S ,310S(1.4845).317L.904L.S31803(1.4462).S32750.S32760, Finish: 2B, BA, NO. 1 NO. 4, HL, 8K and so on...Meanwhile, our company is also engaged in the long-term supply of homemade & imported medium and thick plates, galvanized and carbon steel products. 

Adhering to the principle of "quality first and customer foremost",our company will offer long-term service to nationwide manufacturers of household appliances, elevators, tableware, ornaments, tanks and machines. We can offer precise frosted wiredrawing, 8K mirror finishing and skim board oil-abrasion of various specifications at any time. The precisely-processed products will meet your requirements for high quality. Our company is a modern enterprise integrating distribution and storage. 

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