ASTM SAE4340 Alloy Steel Round Bar Annealed +Quenched SNCM439 Forged Round Rod

AISI/ASTM 4340 Alloy Steel Round Bar SAE AISI 4340 Steel Properties, Heat Treatment SAE4340 Alloy Steel

40CrMnNiMo8-4 is another alloy which displays superior mechanical properties. This material is available in the Annealed or Quenched and Tempered conditions. 4340 is used many industries including oil and gas exploration, gear manufactring etc.

Comparable Standards:

Chemical Analysis (%):

Mechanical properties

AISI 4340 Alloy Steel Round Bar
Applications:

• AISI 4340 Alloy Steel Used for manufacture big sized important Quenched-and-Tempered parts which request good toughness and high strength. Such as top load shaft in heavy-duty machinery.
• AISI 4340 Alloy Steel Used for steam turbine shaft, vane, and heavy-load transmission parts, fastening piece, crankshaft, gears etc. With diameter is biger than 250mm.

Description:
1. AISI 4340/GB40CrNiMo/DIN 1.6511 alloy steel round bar
2. Hot rolled or forged condition, annealing, black or milled surface
3. Hardness: ≤220HBS;
4. Hot rolled technology: EAF+LF+VD
Forged technology: EAF+LF+VD+ESR+Forging +Q T + Machined surface
5. Ultrasonic test standard: SPE1921-GR3, CLASS D/D or E/E
6. Production leadtime: 7~10 days
Competitive Advantage:

• High strength,
• High tenacity
• Good hardenability
• High resistance to thermal properties.
• Competitive price
• Fast production leadtime
• All the material are inspected with 3 times to meet the highly standards

MITTEL Specializes in plastic mould steel, hot work mould steel,
cold work mould steel alloy steel and carbon structural steel, such as: P20, P20+Ni, 1.2714,
1.2083, 1.2316, H13, O1, D2, D3, D5, 1045, 1050, A3, 52100(EN31), 4137, 4140, 4340,
5140, 6150, 8620 and SCM420 for exporting over 20 countries now, such as: Brazil, India,
Turkey, Italy, Germany, Korea, Malaysia, Iran and so on.

Our company have introduced large-sized Vertical saw machines, horizontal saw machines,
Milling machines, Grinding machines and other advance equipments, we can export our
products by wholesales and retail sales, whole plate or strip is available. All our products
can meet the standards of DIN, AISI, JIS and GB, all the material should be inspected the
ultrasonic, hardness and others strict inspection process before the shipment!

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.