8MoB5-4 seamless steel pipe application
8MoB5-4 seamless steel pipe specification covers wall seamless and welded carbon and alloy steel pipe intended for use at low temperatures. The pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation. All seamless and welded pipes shall be treated to control their microstructure.
8MoB5-4 seamless steel pipe/steel tube Chemical composition
| C | Si | Mn | P | S | Cr | Mo | Ti | Al | Cu | B |
| 0.06 - 0.1 | 0.1 - 0.35 | 0.6 - 0.8 | max 0.025 | max 0.01 | max 0.2 | 0.4 - 0.5 | max 0.06 | max 0.06 | max 0.3 | 0.002 - 0.006 |
8MoB5-4 seamless steel pipe/steel tube Mechanical Properties
| nnealing hardness HBS |
Cold pull hardness HBS |
Preheating temperature ℃ |
Quenching temperature ℃ |
Holding time min |
Hardening medium | Temper temperature ℃ |
After tempering hardness ≥HRC |
|
| salt-bath furnace | controlled atmosphere furnace | |||||||
| 235 | 262 | 788 | 1191 | 1204 | 5～15 | air cooling | 522 | 60 |
8MoB5-4 seamless steel pipe surface
varnish paint, anti rust oil, or as per customers’ requirements
MoB5-4 seamless steel pipe package
Steel strips bundled, Woven bag packed, Plastic caps on both ends, or as per customers' requirements.
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