Sichuan Liaofu Special Steel Company is one of the most experienced manufacturers and suppliers of 300m aisi 4340m ultra high strength tensile steel round bar in China. With over 20 years' experience, our factory offer high quality products made in China with competitive price. Welcome to contact us for wholesale service.
AMS6416 300M/4340M alloy steel
300m steel is a kind of low alloy high strength steel, has become the world's highest strength, comprehensive performance is best, the most widely used one of the best gear steel and reputation.Its mechanical properties with high strength, high transverse plastic, high fracture toughness, fatigue performance and good corrosion resistance, etc.In China in the mid - 80 - s began AMS6417 copied by American aerospace material standard, and in 1990 by metallurgical and two joint technical appraisal of aeronautics and astronautics
AISI 4340 ultra high strength tensile steel round bar for aerospace application
Standards:ASTM,JIS,GB,EN(DIN,BS,NF) Or Per as clients’ requires.
Product Basic Information:
| Size Range | |||
| Round Bar | Diameter(mm) | Length(mm) | -- |
| 30~1000 | 500~12000 | -- | |
| Chemical Composition(%) | ||||||||
| C | Mn | P | S | Si | Cr | Mo | Ni | V |
0.38-0.46 | 0.60-0.90 | 0.010Max. | 0.010max. | 1.45-1.80 | 0.70-0.95 | 0.30-0.65 | 1.65-2.00 | 0.05min. |
1.Chemical Composition and Mechanical Properties(In Quenched & Tempered State):
Material | 4340M | ||
Chemical Composition | Mechanical Properties(In Quenched & Tempered State) | ||
C | 0.38-0.46 | Tensile strength(MPA) | 1860 |
Si | 0.17-0.37 | Yield strength (MPA) | - |
Mn | 0.60-0.90 | Elongation(δ5/%) | - |
Cr | 0.70-0.95 | Reduction in Area (ψ/%) | 25 |
Mo | 0.30-0.65 | Impact (J) | 23 |
P | ≤0.010 | Hardness (Anealed Condition) | ≤241HB |
S | ≤0.010 | ||
Cu | ≤0.30 | ||
Ni | 1.65-2.00 | ||
V | Min 0.05 | ||
2.Product Application Areas:
4340M steel USES vacuum arc melting technology to improve purity, plasticity, toughness, etc. AMS6416 standard USES non-vacuum smelting, which is the general aviation quality level. Other parts of the standard use vacuum smelting to achieve high quality aviation quality level.
By the standard heat treatment oil quenching and tempering, the tensile strength of the steel can reach more than 1860MPa, which is currently the highest strength of low-alloy ultra-high strength steel. High strength can reduce the weight of the parts, improving the strength has been one of the main goals of landing gear parts design. The main wing bearing components of the American aircraft are also 300M steel and used to the highest strength level.
3.Cherecteristics:
The fatigue resistance of 4340M steel is obviously better than that of 4340. This is extremely beneficial for the long life of the landing gear and other aircraft components and is the main reason why 300M steel is widely used in aircraft.
It contains 1.5% silicon, which improves the stress corrosion resistance of 300M steel.
4.Produce process:
EAF + LF + VD + Forged + Heat Treatment -Annealed
Factory Pictures
Certifications:
Factory Manufacture Process:
2.Product photos
3.Polished bright bars
3.Packing & Shipping
FAQ
1.What is your MOQ?
500Kg
2.What kind of terms of payment?
L/C,T/T( 30% deposit in advance,the balance paid before shipment)
3.Can you customise for me if I provide a photo?
Sure,of course we can.But we need your cooperation and give us the details,then we will quote you specific price and show simple for you check.
4.How long is your lead time?
Samples:10 daysafterreceivingthepayment.
Bulkorder:30 daysafterreceivingdeposit.(accordingtospecific quantity)
5.Is drop shipping available?
Yes,we send the good to the world.
6.HowdoIknowthatyouareareliablesupplier?
WeareaAssessedSupplierofAlibaba.com.Alibabaasthethirdpartytoverifyourfactoryandofficetoconfirmthatwearearealandreliablesupplier.
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