AISI 4340  it is a type of alloy steel .

What is the difference of the grade for each standard ?

 GB Steel Number:40CrNi2MoA, German DIN steel Number 36CrNiMo4, German DIN material number 1.6511, French NF standard 40NCD3, Japanese JIS standard SNCM439, British BS standard 816M40, American AISI/ASTM4340, American UNS standard G43400.

AISI 4340 steel is suitable for the manufacture of important parts with high strength and good plasticity, and for the manufacture of important parts with special functional requirements after nitriding, such as shafts, gears, fasteners, etc.

AISI 4340 steel is generally annealed or high temperature tempering supply state Brinell hardness HBW is less than or equal to 269.

AISI alloy 4340 steel supplying chain:

4340 round steel bar: diameter 8mm-3000mm

4340 steel plate: thickness 10mm - 1500mm x width 200mm - 3000mm

Tolerance: DIA-0 /+ 0 ~ 5 mm cm, thickness -0/+ 0 ~ 5 mm cm, width: -0/+ 0 ~ 10 mm.

Production : EF/EAF/LF/VD/ESR

Certificate : ISO 9001

Surface finish: black, rough, turning or in accordance with specified requirements.

The bright surface with tolerance in 0/+1.00mm

Package: wooden box or nude loading by the container .

Loading port : Shanghai /Shenzhen port of China .

Lead time :15-45days depend on the customer’s size and quantity

All goods will do with UT C/C or D/D before loading .

Payment terms ： T/T or L/C

What is the difference between AISI 4140 VS AISI 4340 ?

AISI 4340 steel is considered to be of medium quality carbon by quenching and tempering.4140 steel is known for its ability to resist corrosion, considerate strength, and wear resistance.

SOLAR SPECIAL STEEL INTERNATIONAL LIMITED always export AISI 4340 steel to Mexico ,Italy , Australia ...with great and high reputation in quality and loading service .

Solar Special Steel International Limited   

Contact Person :Wendy

Telephone:+86 18688633122  whatsapp&wechat

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Email:ss@solarsteel.cn