4340 Steel Industry Information

Describe:

4340 belongs to the American standard high-strength alloy structural steel, which is made of high-quality carbon structural steel by appropriately adding one or more alloying elements (the total content does not exceed 5%).

Corresponding steel number:

China GB steel number 40CrNiMoA, 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

Craft:
Adopt electric furnace, LF furnace, VD furnace, pouring, primary bar / large material opening and rolling process, as well as slow cooling, flaw detection, annealing and other smelting processes

Forging of 4340 alloy steel:

4340 steel is first preheated up to 1150°C – 1200°C for forging until uniform temperature throughout the section
Do not forge below 850 °C, 4340 has good forging characteristics, but care must be taken when cooling as the steel can easily crack. After the forging operation, the workpiece should be cooled as slowly as possible. It is recommended to cool in sand or dry lime etc.

Our company

Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc. Over 10 years specialize in 4340 and 4140 steel round bars,Around 10,000 tons hot rolled or forged steel round bars in stock for fast delivery.Q+T,Annealed heat treatment and machined,peeled,polished surface can customize.After more than 10 years development and growing, Songshun Steel becomes one comprehensive special steel factory, stockist and exporter.

Combined with experienced exporting team and professional technical knowledge, Songshun Steel offers both technical advice and support, as well as global professional steel solution and service.

Due to satisfactory reliable quality and professional service, Songshun expands our market worldwide, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia ,UAE, Canada, Brazil, Mexico and so on.

Songshun specialized in Special Steel for almost 20 years. We can supply mold steel, high speed steel, alloy steel, free cutting steel and etc.Welcome your contact 24 hours a day!!!
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