Datong Hydraulic

  GB 40CR alloy Steel is a high quality Quenched and Tempered Alloy Structural steel, It belong to the high quality low carbon,Low alloy chromium, molybdenum, nickel case hardening steel. Oil Quenched & Tempered Hardness is 28-34 HRc. GB 40CR steel Annealing delivery hardenss less than 250HB. 40CR With a lower carbon content range, So GB 40CR alloy steel have good weldability. GB 40CR Alloy steel, we can supply the round bar,  seamless steel tube ,  hard chrome bar . GB 40CR steel Round bar can be sawn to your required lengths as one offs or multiple cut pieces. Chemical composition C(％) 0.37～0.44 Si(％) 0.17～0.37 Mn(％) 0.50～0.80 P(％) ≤0.030 S(％) ≤0.030  Cr(％) 0.80～1.10           Equivalent Of 40Cr alloy Structure Steel USA Germany China Japan France England Italy Poland ISO Austria Sweden Spain ASTM/AISI/UNS/SAE DIN,WNr GB JIS AFNOR BS UNI PN ISO ONORM SS UNE 5140 / G51400 41Cr4 / 1.7035 40Cr SCr440 42C4  530A40 /...

  40Cr steel is a kind of Chinese GB standard alloy steel for engineering and machinery purpose, and one of the most widely used steel grades. For 40Cr material hardness, specifications and equivalent, please see the table below.We are professional   40Cr Steel Bar   manufacturer. After quenching and tempering treatment, 40Cr steel has good comprehensive mechanical properties, low temperature impact toughness, low notch sensitivity, good hardenability, and high fatigue strength in cold oil. When water cooling, the complicated shape of the parts is prone to cracks, the cold bending plasticity is medium, and the cutting workability after normalizing is good, but the weldability is poor, should be preheated before welding, and is generally used in the state of quenching and tempering. 40CR STEEL CHEMICAL COMPOSITION   Chemical Composition (%) Grade C % Si Mn Cr 40Cr 0.37 – 0.44 0.17 – 0.37 0.5 – 0.8 0.80 – 1.10 MECHANICAL PROPERTIES OF 40CR ALLOY STEEL Tensile strength:...