Categories | Engineering Steel Bar |
---|---|
Brand Name: | CF STEEL |
Model Number: | 1.6511 SNCM439 EN24 SAE4340 40CrNiMo |
Certification: | ISO, Mill Certificate, SGS |
Place of Origin: | China |
MOQ: | Negotiable |
Price: | Negotiable |
Payment Terms: | L/C, T/T |
Supply Ability: | 1000t/Month |
Delivery Time: | 7-15 days |
Packaging Details: | Export Standard Packing or Customers'demand |
Standard: | AISI,DIN,ASTM,GB |
Surface: | Turned, black |
Technique: | Forged,Hot Rolled |
Test: | SGS / Ut 100% / Element Testing |
Ut standard: | Sep 1921-84 class 3 C/C to D/D |
Heat Treatment: | Annealing/Q+T |
Hot Rolled 1.6511 SNCM439 EN24 SAE4340 40CrNiMo Engineering Steel Round Bar
1. 4340 steel introduction
AISI 4340 steel is a medium carbon, low alloy steel known for its toughness and
strength in relatively large sections. AISI 4340 is also one kind
of nickel chromium molybdenum steels. 4340 alloy steel is generally
supplied hardened and tempered in the tensile range of 930 - 1080
Mpa. Pre hardened and tempered 4340 steels can be further surface
hardened by flame or induction hardening and by nitriding. The 4340
steel has good shock and impact resistance as well as wear and
abrasion resistance in the hardened condition. AISI 4340 steel
properties offer good ductility in the annealed condition, allowing
it to be bent or formed. Fusion and resistance welding is also
possible with our 4340 alloy steel. ASTM 4340 material is often
utilized where other alloy steels do not have the hardenability to
give the strength required. For highly stressed parts it is
excellent choice. AISI 4340 alloy steel can also be machined by all
customary methods.
2. 4340 Steel equivalent
Country | Japan | Germany | Britain | USA |
Standard | JIS G4103 | EN10250 | BS970 | ASTM A29 |
Grade | SNCM439 | 36CrNiMo4/1.6511 | EN24/817M40 | 4340 |
3. 4340 steel chemical composition
Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
4340 | 0.38-0.43 | 0.15-0.35 | 0.6-0.8 | 0.035 | 0.04 | 0.7-09 | 0.2-0.3 | 1.65-2.0 |
36CrNiMo4 | 0.32-0.4 | 0.4 | 0.5-0.8 | 0.035 | 0.035 | 0.9-1.2 | 0.15-0.3 | |
EN24 | 0.36-0.44 | 0.1-0.4 | 0.45-0.7 | 0.035 | 0.04 | 1.0-1.4 | 0.2-0.35 | 1.3-1.7 |
SNCM439 | 0.36-0.43 | 0.15-0.35 | 0.6-0.9 | 0.03 | 0.03 | 0.6-1.0 | 0.15-0.3 | 1.6-2.0 |
4. 4340 steel mechanical properties
The mechanical properties mainly include tensile strength, yield
strength, elongation, area or reduction, hardness, impact value,
non-metalic inclusion etc. Different heat treatment, the mechanical
properties will be different, such as normalized, tempered, QT. If
you want to know the properties, kindly contact the salesman.
5. Ready Stock:
Round Bar diameter 14-460mm.All the sizes as require can be
customerized as fresh production with MOQ.
6. Delivery state:
Hot rolled, Heat Treatment,black, hardness or tempered
hardness:28-34 HRC.
Annealing:HBS<=235.
7. Delivery time
For abundant stock, 15-20 days.For customized products, 30-50 days.
We have full set of equipement (sawing machine/grinding/polishing
machine) to make customer's specification.
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Strict Quality Control
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About Us
Guangzhou Changfeng Steel Co., Ltd. is a professional special steel company, which specializing in
this line in China since 2005. Our main products are Plastic Mould
Steel, Hot Work Mould Steel, Cold Work Mould Steel, Alloy
Structural Steel, Tool Steel, Stainless Steel, Carbon Steel and
Forged Block.To ensure provide high quality products to customers,
we have close cooperation with many Chinese first class special
steel enterprises, including Baosteel Group, Dongbei Special Steel,
Changcheng Special Steel, Hongsheng Heavy Industry, Xingcheng
Special Steel and Daye Special Steel.