GB/T 40Cr Alloy structural steel Round bar Impact energy

GB/T 40Cr Alloy structural steel Round bar is China GB standard steel, 40Cr Alloy structural steel Round bar machinery manufacturing industry is one of the most widely used steel. After quenching with good mechanical properties, good low temperature impact toughness and low notch sensitivity. 40Cr has good hardenability, when water can quench hardenability to Ф28 ~ 60mm, when oil quenching hardenability to be Ф15 ~ 40mm.
In addition to outside 40Cr quenching is further adapted to cyanide and high quenching. Cutting performance is better, when the hardness of 174 ~ 229HB, the relative machinability of 60%. GB/T 40Cr Alloy structural steel Round bar suitable for the production of medium-sized plastic molds.
GB/T 40Cr Alloy structural steel Round bar chemical composition
C: 0.37 ~ 0.44 Si: 0.17 ~ 0.37 Mn: 0.50 ~ 0.80 Cr: 0.80 ~ 1.10 Ni: ≤0.30 P: ≤0.035 S: ≤0.035
Cu: ≤0.30
GB/T 40Cr Alloy structural steel Round bar Mechanical Properties
Sample blank dimensions (mm): 25
Heat treatment:
The first quenching temperature (℃): 850; Coolant: oil
Tempering heating temperature (℃): 520;
Tensile strength (σb / MPa): ≥980
Yield point (σs / MPa): ≥785
Elongation rate (δ5 /%): ≥9
Section shrinkage (ψ /%): ≥45
Impact energy (Aku2 / J): ≥47
Brinell hardness (100 / 3000HBS) (annealing or tempering state): ≤207
Bebon International can offer large stock supply of GB/T 40Cr Alloy structural steel Round bar . If you are interested in GB/T 40Cr steel Round bar steel tube, please contact us freely, we are happy to serve you

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