40CrNiMoA Steel Round Bar , Hot Rolled Alloy Bar 40Crnimoa Data Sheet AISI 4340

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.

Jiangsu Mittel Steel Industrial Limited is  located in Wuxi City,  a beautiful city near Shanghai.  Wuxi is close to  Shanghai (BAO STEEL) ,Zhangjiagang (ZPSS),Ningbo (BAO XIN),KUN SHAN (DKSS), enjoy excellent geographic location and convenient water, land and air transportation. , Wuxi become the biggest  stainless steel sheet ,plate and coil  supply Centers in China. Jiangsu Mittel Steel Industrial Limited was established in 1998 years. as one of the largest stockists and manufacturers of industrial grade Stainless Steel products and derivatives in Wuxi ,We keep a stock of 50000 tons every month, so we can delivery goods in fast time.

Our company supplies cold/hot-rolled stainless steel sheets,stainless steel coils and stainless steel Plate to many steel factories from athome and abroad, including Shanxi Taigang Iron& Steel CO, . Ltd (TISCO)Zhangjiagang Pohang (ZPSS), Shanghai BAO STEEL, Ningbo Baoxin and steel factories in Taiwan area, Mainland Chinese and foreign countries and regions. 

Our long-term business lines are 201.202.304(1.4301).304L.316.316L(1.4404).430.409L, 309S ,310S(1.4845).317L.904L.S31803(1.4462).S32750.S32760, Finish: 2B, BA, NO. 1 NO. 4, HL, 8K and so on...Meanwhile, our company is also engaged in the long-term supply of homemade & imported medium and thick plates, galvanized and carbon steel products. 

Adhering to the principle of "quality first and customer foremost",our company will offer long-term service to nationwide manufacturers of household appliances, elevators, tableware, ornaments, tanks and machines. We can offer precise frosted wiredrawing, 8K mirror finishing and skim board oil-abrasion of various specifications at any time. The precisely-processed products will meet your requirements for high quality. Our company is a modern enterprise integrating distribution and storage. 

If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the near future.