Name: China Supplier ASTM 4340 Steel Shaft | Slow Cooling Annealing SAE 4340 Steel Round Bar
Brand: SongShun
Availability: InStock

Product Details

1.Introducing 4340 Products 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%).

China GB steel number40CrNiMoA, 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 Chemical Composition:C:0.37-0.44 Si:0.17-0.37 S0.035 P:0.035 Mn:0.50-0.80 Cr:0.60-0.90 Mo:0.15-0.25 N:1.25-1.65
SAE 4340 Mechanical Properties
Tensile strength b (MPa): 980(100)
Yield strength s (MPa): 835(85)
Elongation 5 (%): 12
Area shrinkage (%): 55
Impact energy Akv (J): 78
Elongation 5 (%): 12
Area shrinkage (%): 55
Impact energy Akv (J): 78
Impact toughness value kv (J/cm2): 98(10)
Sample size: sample blank size is 25mm
Surface Treatment:
Plate: Origin Black,Orign cold rolled bright, Machined,Grinded
Round Bar: Origin Black,Orign cold rolled(drawn) bright,Turned, Peeled, Grinded

Size:
Round bar:Diameter(mm) Max 800mm;Length(mm) Max 12000mm.
Plate: Thickness(mm) Max 800mm; Width(mm) Max 2300mm; Length(mm) Max 12000mm.
Condition: Cold rolled(drawn)50mm, Hot rolled12-250mm, Hot forged50mm.(Thickness/Diameter)

Annealing:
Heat the steel slowly to 800-860°C and allow enough time for the steel to be thoroughly heated. Cool slowly in the furnace.

Hardening:
4340 steel is usually supplied ready heat treated. If further heat treatment is required annealed 4340 should be heated slowly to 830-865°C and after adequate soaking at this temperature quench in oil. Temper as soon as the steel reaches room temperature.

2.4340 Product And Company Pictures

3.Certifications

4.Product Packaging Under normal circustances,the delivery time is 10-15 days if we have stocks in our warehouse. Otherwise,we need 45 to 60 days because they are customized and high requirement of quality.

5.FAQQ:Are you a factory or a trading company?
A: The fact is that we are a company. We have own factory and several warehouses. Under the trend of globalization of the world, we established a professional foreign trade department to change the world.
Q: What is your delivery date?
A: The delivery date is about 10-30 days after receipt of payment.
Q: Can I get some samples?
A: We are honored to offer you samples.
Q: What port do you usually ship from?
A: We have 3 common ports,Tianjin, Shanghai and Shen.
Q: What is the payment terms?A: T/T is our priority, L/C is also OK for us.

6.Contact usFeel free to contact us,we are glad to serve for you.Songshun Always Open the Door for You.MiKi Zhuo
Skype/Whatsapp/Wechat:86-18269260283
ADD:No.4 Dongda Street, Shatou, Changan Town, Dongguan City, Guangdong Province, P.R.C China

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