18CrNiMo7-6 18CrNiMo7 18NCD6 1.6587 820A16 Forged Steel Round Square bar UT Tested
1.18CrNiMo7-6 18CrNiMo7 18NCD6 1.6587 820A16 forged steel bar sizes we can offer;
Round bar: 200-1000mm
Square bar:150×150-600×600mm
2.Supply condition for 18CrNiMo7-6 18CrNiMo7 18NCD6 1.6587 820A16 Forged steel bars:
Black /Rough Machined /Rough turned
3.Futhur heat treatment for 18CrNiMo7-6 18CrNiMo7 18NCD6 1.6587 820A16 forged steel :
Normalized
Annealed
Q&T(Quenched&Tempered)
4.18CrNiMo7-6 18CrNiMo7 18NCD6 1.6587 820A16 Forged Steel round bar tolerance:
Black surface
Forged sizes up to 500mm (-0/+5mm)
Forged sizes above 500mm in diameter (-0/+8mm)
Machined surface to all sizes (-0/+3mm)
5. 18CrNiMo7-6 18CrNiMo7 18NCD6 1.6587 820A16 Equivalent
| EU |
Germany |
France |
England |
Italy |
China |
Finland |
Inter |
| EN |
DIN,WNr |
AFNOR |
BS |
UNI |
GB |
SFS |
ISO |
| 18CrNiMo7-6 |
17CrNiMo6 |
18NCD6 |
820A16 |
18NiCrMo7 |
17Cr2Ni2Mo |
511 |
18CrNiMo7 |
| 17CrNiMo7 |
|
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|
|
|
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6.Chemical composition of 18CrNiMo7-6 18CrNiMo7 18NCD6 1.6587 820A16
| C |
Si |
Mn |
Ni |
P |
S |
Cr |
Mo |
| 0.15 - 0.21 |
max 0.4 |
0.5 - 0.9 |
1.4 - 1.7 |
max 0.025 |
max 0.035 |
1.5 - 1.8 |
0.25 - 0.35 |
7.HEAT TREATMENT OF 18CrNiMo7-6 18CrNiMo7 18NCD6 1.6587 820A16 FORGED STEEL
- Soft Annealing: Heat 17CrNiMo6 to 650-700oC, cool slowly in furnace. This will produce a maximum Brinell hardness of 229.
- Normalizing: 850-880oC, air.
- Hardening: Carburising: 880-980oC. Core Hardening: 830-870oC, water. Case Hardening: 780-820oC, water.
- Tempering:Temperature: 150-200oC
8.Quality control:
1. Melting Process: EAF/BOF+LF+VD resulting in ingots
2. Both ends cut by saw
3. Ratio of forging:minimum 3:1
4. Grain size of final product: according to ASTM E112 more than 5,preferred more than 8
5. Ultrasonic test: As per SEP1921 Class C/c or D/d
9.MOQ: one piece per size/grade
10.Payment term: FOB CIF CFR EXW and so on
11.Delivery time : 7 to 30 days after deposit received.
12.Mark on both ends
Heat number, size, Length,grades, Weight,Origin (as per contract), or other as required
