1.forged or hot rolled
2.SEP1921 D/d
3. 30-60 days
4.(14~500)*(50~15000)*(2000~6000) or dia (15~900)
5. black,milled,turned
1.Chemical Composition
Standard | Steel Grade | C | Si | Mn | P | S | Cr | Mo | V | W | other |
DIN | 1.6510 | 0.35-0.43 | ≤0.40 | 0.50-0.80 | 0.025 | 0.035 | 0.60-1.00 | 0.15-0.25 |
|
| Ni 0.70-1.20 |
ASTM | 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 |
|
| Ni 1.65-2.00 |
GB | 40CrNiMoA | 0.37-0.44 | 0.17-0.37 | 0.50-0.80 | 0.025 | 0.025 | 0.60-0.90 | 0.15-0.25 |
|
| Ni 1.25-1.65 |
2.Size:
round | diameter(mm) | length(mm) |
|
14~900 | 2000~6000 |
| |
plate/sheet | thichkness(mm) | width(mm) | length(mm) |
15~500 | 50~1500 | 2000~6000 |
3.Hardness of annealed:
HBS≤ |
4. The Process
EAF+LF+VD+ESR+Forged or hot rolled+Heat Treatment(optional) |
5. condition of surface
black | rough machined(peeled) | turned |
6. Inspecting
ultrosonic test, according to SEP1921 D/d or as your requirements |
7. Quality Control
Supply M.T.C or third party inspection institution |