1.6511 SAE4340 SNCM439 Hot Rolled Alloy Steel Rod Thickness 10 - 700mm
1.6511 /SAE4340/SNCM439 Alloy Steel Round Steel for Mechanical
1.Equivalent grades:
| GB(China) | DIN(German) | AISI(USA) | JIS(Japan) |
| 40CrNiMo | 1.6511 | SAE4340 | SNCM439 |
2.Chemical composition(%)
| C | Si | Mn | S | P | Cr | Mo | Ni |
| 0.38~0.43 | 0.15~0.35 | 0.60~0.80 | ≤0.040 | ≤0.035 | 0.70~0.90 | 0.20~0.30 | 1.65~2.00 |
3.Available size(mm):
| Flat Bar Size(mm) | Round bar Size(mm) | |||
| Thickness | Width | Length | Diameter | Length |
| 10-700 | 155-2200 | 3000-6000 | 10-300 | 3000-6000 |
4.Features:
Excellent hardenability, high toughness and good heat-resistance and fatigue-resistance.
5.Heat treatment:
Quenching 850 degrees; coolant: oil;
tempering temperature of 600 degrees; coolant: water, oil;
Steel annealing or high temperature tempering supply state Brinell hardness GBW is less than or equal to 269.
6.Application:
Used as require good toughness, high strength, as well as the important conditioning of large size, heavy machinery such as high load of axial, turbine shaft, larger than 250 mm in diameter of helicopter rotor shaft, turbojet engine turbine shaft, blade, high load of transmission parts, fasteners of the crankshaft,gear, etc.
It can also be used for operating temperature over 400 ºC of rotor shaft and blade, etc. and after nitriding processing can also be used to make special performance requirements of the important parts, after low temperature tempering or can be used for ultra-high strength steel after thermal quenching.
7.Delivery time:
For abundant stock, 15-20 days.For customized products, 30-50 days.
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