NEW-ERA STEEL TUBE TECHNOLOGY CO.,LTD
NEW-ERA STEEL TUBE HOLDING NINGBO PIPEWAY TRADE CO.,LTD
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Additional technical requirements for steel grade 38H2MUA pipes
Chemical composition, %
| С | Мп | Мо | Р | S | Si | Сг | Аl | |
| GOST 4543-75 | 0,35±0.01 | 0.30±0.02 | 0.15± 0.02 | ≤ 0.025 | ≤0.025 | 0.20± 0.02 | 1.35± 0.05 | 0.70± 0.1
|
| Our tolerance | ±0.05 | ±0.1 | ±0.05 | Same | Same | ±0.1 | ±0.2 | ±0.2 |
Mechanical properties:
| steel | yield (N/ mm²) | tensile (N/ mm²) | elongation % | Hardness, HB max |
| 38X2МЮА | 420 | 617 | 12 | 250 |
Size list:
| OD, mm | WT, mm | L, mm* |
| 71.0 | 8.50 | 3 700.0 |
| 71.0 | 8.50 | 4 000.0 |
| 71.0 | 8.50 | 4 200.0 |
| 83.0 | 9.00 | 4 200.0 |
| Order for CDS acc GOST 8734-75 steel 38Cr2MoAlA (38X2МЮА) | |||||
| Report No 824-97 | |||||
| Steel | Heat treatment | ||||||
|---|---|---|---|---|---|---|---|
| Quench | Tempering | ||||||
| Temperature, °С | Cooling sphere | Temperature, °С | Cooling sphere | ||||
| 1st quench or normalization | 2nd quench | ||||||
| 38Х2МЮА (38ХМЮА) | 940 | - | Water or oil | 640 | Water or oil | ||
