alloy structural steel:40CrNiMoA AISI4340 36CrNiMo4, 1.6510
standard:GB/T 3077-1988
Chemical composition:
C :0.37--0.44
Si:0.17--0.37
Mn:0.50--0.80
S :allow remains content<=0.025
P : allow remains content<=0.025
Cr:0.60--0.90
Ni:1.25--1.65
Cu:allow remains content<=0.025
Mo:0.15--0.25
mechanical properties:
tensile strength b (MPa):>=980(100)
yield strength (MPa):>=835(85)
extensibility (%):>=12
reduction of area (%):>=55
ballistic work Akv (J):>=78
notched bar impact strength kv (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.

40CrNiMoA| GB/T 3077 40CrNiMoA Alloy Steel Plate

Specification in 40CrNiMoA

Thickness: 8MM to 250 MM,

Width: 1500mm to 4050mm,

Length: 3000mm to 15000mm

Gangsteel is specialized in supplying Alloy steel plate in 40CrNiMoA. For more information of 40CrNiMoA steel plates, please check them in following:

For more information about GB/T 3077 Alloy steel plate, please clicking Mill Technical Information

If GB/T 3077 40CrNiMoA covers the following issues of hot rolled and forging alloy steel: the dimension, shape, weight, tolerance, engineering specification, test method, inspection rules, packaging, marking, and quality certificates.

The standard applies to alloy structural steel bar 250mm maximum diameter or thickness. After consultation between the two sides of supply and demand, bar stock of diameter greater than 250 mm can also be provided

The chemical compositions of steel grades specified in the standard also apply to steel ingot, billet and its productions.