40CrNiMo round bar

40CrNiMo round bar is a kind of Stainless steel bar which has the high strength and toughness. 40CrNiMo round bar also has the good hardenability and anti-overheating stability.

Name: 40CrNiMo
Standard: GB / T 3077-1999

40CrNiMo chemical composition:

40CrNiMo mechanical properties:
Tensile strength σb (MPa): 933 ~ 1011 Conditions yield strength σ0.2 (MPa): 832 ~ 899
Elongation δ5 (%): 19 ~ 20 section shrinkage ψ (%): 53 ~ 64
Impact energy Akv (J): 117 toughness values ​​αku (J/cm2): 144 ~ 172
Hardness: 274 ~ 303HB

Applications:Usually being used at the quenched and tempered or case hardening state,for the manufacture of non-corrosive media and working temperature below 250 , the medium containing a mixture of nitrogen and hydrogen in the work of a variety of high-pressure pipes and fasteners, the higher the infiltration carbon components, such as gears, shafts and so on.

40CrNiMo characteristics:high strength, toughness and good hardenability stability and resistance to overheating, but the white dot high sensitivity, temper brittleness. Poor welding, high temperature preheated before welding, after welding the need to eliminate stress, quenched after use. General production of high strength, good plasticity important parts, after nitriding treatment produced special performance requirements of important parts such as shafts, gears, fasteners.

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