Min. Order: 10
40CrNiMoA
alloy steel
nickle steel
alloy structural steel：40CrNiMoA
standard：GB/T 3077-1988
●Chemical composition：
碳 C ：0.37～0.44
硅 Si：0.17～0.37
锰 Mn：0.50～0.80
硫 S ：allow remains content≤0.025
磷 P ：allow remains content≤0.025
铬 Cr：0.60～0.90
镍 Ni：1.25～1.65
铜 Cu：allow remains content≤0.025
钼 Mo：0.15～0.25
●mechanical properties：
tensile strength σb (MPa)：≥980(100)
yield strength σs (MPa)：≥835(85)
extensibility δ5 (％)：≥12
reduction of area ψ (％)：≥55
ballistic work Akv (J)：≥78
notched bar impact strength αkv (J/cm2)：≥98(10)
rigidity ：≤269HB
specimen size：specimen size of rough 25mm
●heat treatment regime and metallurgical structure：
heat treatment regime ：quenching 850℃,oil cooling ;backfire 600℃,water cooling 、oil cooling.
●deliver position ：heat treatment（normalizing、annealing or high-temperature backfire）or no heat treatment, this should be shown on the contract.

website http://www.testeel.com