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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
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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.
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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.
3.Certifications4.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
songshunmoldsteel41404340
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