SNCM439 / SAE4340 / 40CrNiMoa Alloy Steel Round Bar Forged 80mm Dia
Price:
1.65USD/KG
MOQ:
100KGS
Delivery Time:
7 Working Days
Brand:
Mittel
Product Description
NCM439/4340/40CrNiMo Round Steel Bar
34CrNiMo6 / 1.6582 / 4340 / SNCM439 Alloy Steel Bar Round for Axle, Gear, Fastener
Equivalence
| AISI / SAE | DIN / W.Nr | JIS | GB |
| 4340 | 34CrNiMo6 1.6582 |
SNCM439 | 40CrNiMoA |
Chemical Composition (%)
| Steel Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
| 34CrNiMo6 1.6582 |
0.30 0.38 |
≤ 0.40 |
0.50 0.80 |
≤ 0.035 |
≤ 0.035 |
1.30 1.70 |
0.15 0.30 |
1.30 1.70 |
| 4340 | 0.38 0.43 |
0.15 0.35 |
0.60 0.80 |
≤ 0.035 |
≤ 0.040 |
0.70 0.90 |
0.20 0.30 |
1.65 2.00 |
| SNCM439 | 0.36 0.43 |
0.15 0.35 |
0.60 0.90 |
≤ 0.030 |
≤ 0.030 |
0.60 1.00 |
0.15 0.30 |
1.60 2.00 |
Dimensions
| Hot Rolled | Forged | Cold Drawn | |
| Diameter (mm) | 10-260 | 150-1500 | 2.5-70 |
| Length (mm) | 4000-10000 | 3000-10000 | 4000-10000 |
Delivery Condition
EAF+LF+VD, Hot rolled, Forged or Cold drawn, Black surface or Machined surface (Peeled, Turned, Grinded), Annealed or Q+T, UT 100% Passed
mechnical data
40CrNiMoA Alloy Steel Mechanical Properties
- Yield strength: ≥ 835 MPa
- Tensile strength: ≥ 980 MPa
- Elongation: ≥12%
- Rate of reduction in area: ≥55%
- Impact absorbing energy: ≥ 78 J
- Material Brinell Hardness: ≤ 269 (Annealed or high temperature tempered steel rod)
- Sample size: 25mm
Heat treatment specification
- First quenching heating temperature: 850 °C (Quenchant– oil)
- Tempering heating temperature: 600 °C (Quenchant– water, oil)
It was used where require high tensile and good wear-resistance property parts such as heavy-duty axles, shafts, heavy-duty gears, spindles, pins, studs, bolts, couplings, sprockets, pinions, torsion bars, connecting rods. These high tensile alloy steel has been widely used in the areas such as petrol chemical industry, automotive, steam power equipment and other high temperature services.
Characteristics
It is a low-alloy steel containing chromium and molybdenum and nickel as strengthening agents. The steel has good strength and toughness, hardenability and overheat resistance stability, also high susceptibility of flake formation and temper brittleness. Its poor weldability requires high temperature preheating and stress relieving, before and after process. It should be Hardened and tempered before application.
Applications
This low-alloy steel finds many applications where high strength, plasticity required such as large and important parts requiring hardening and tempering as heavy load axle for heavy machinery, axle with diameter over 250mm for steam turbine, axle of rotor wing for helicopter, axle of turbo and turbine blade and heavy load transmission part for jet engine, fasteners and gear for crank axle. It’s also used for rotor spindle and blade where temperature over 400℃. It can be used as important part with special properties after nitriding and ultrahigh strength steel after low tempering isothermal quenching.
Similar Products
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Location
NO.288,YOUYI ROAD ,XI SHAN DISTRICT,WUXI CITY,CHINA
Contact Person
Gao Ben