40Cr Alloy Structural Steel

Minimum Order
25 ton
30 days
T/T, L/C
Product Description

40Cr is under the standard of GB/T 3077-1999 in China, 40Cr steel is one of the most widely used steel in machinery manufacturing field. After quenching and tempering, 40Cr has good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity. its hardenability is good , when water quench hardening can reach to 28 ~ 60 mm, when oil quenching hardening can reach to 15 ~ 40 mm. In addition, except quenching and tempering, it also fits for cyanide and high frequency quenching process. Has good machinability, when hardness is HB174 ~ 229, the relative cutting machining is 60%. The steel is suitable for manufacturing to medium-sized plastic mold.

Equivalent grades:

JIS SCr440

DIN 1.7045

DIN 41Cr4/42G4

BS 41Cr4

SS 2245

ASTM 5140

ISO 41Cr4

Chemical composition



Mechanical properties

GRADEtTensile Strength mintYield Strength mintElongation min.tcontraction mintimpact mintHardness Max

tb/M Pats/M Pat5/%t/%tAku2/JtHBS


Heat treatment:

AC3= 780 C

Normalizing: 850 C, oil cooling, hardness 179~229HBS

Softening treatment: 740~760 C, holding 4~6 hours, slow cool at 5~10C/h, cool to under 600 C,

Air cooling.


Widely used as Gear, sleeve, shaft, spindle, spindle, pin, connecting rod, crankshaft, screws.

Thank you for your visitation very much. Our company's steel business started from 2004, through the arduous efforts of 15 years, the company build a 50-person steel sales team serving domestic and international market, and having established partnership with 58 large scale Chinese manufacturers. We carry out strict standard of auditing and management in production, technology and sales, provide services based on customer needs. Breaking the traditional model that exporter and manufacturer are as one, we are not selling product to you, but establishing a long-term strategic partnership with you as one, dedicated to help you make money and solve all problems you worried about in importing. Our strength steel items include high-quality carbon structural steel, alloy structural steel, carbon tool steel, high speed tool steel, etc. Currently, the customers we served mainly come from United States, Canada, Germany, Japan, Italy, Britain, Southeast Asia and other countries and regions. Looking forward to cooperate with you!

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1.7035,5140,SCr440,40Cr,alloy structure steel,tool steel,die steel,specialty steel,steel bar,hotwork

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An Shan Ying Yat Co., Ltd.

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Shandong Anniu Group

China China
Contact Person: Martin Ge
Telephone: 86-150-92162059
Location: Shandong, China
Business Type:Manufacturer, Exporter
Main Target Region:United States
FL16,xinzou time plaza,zouping
Main Product:
special steel, alloy steel
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