詳細(xì)說明
Product Name | Material | Standard | Specification | Application |
Low - middle pressure boiler tube | 10# | GB3087-2008 ASTM A106 A,B | ∮8-1240*1-200 | Apply to all kinds of structure low pressure, middle pressure boiler and locomotive boiler |
| Steel grade | Chemical composition (%) | ||||||
C | Mn | Si | Cr | Ni | Cu | P.S | ||
GB3087 | 10 | 0.07~0.14 | 0.35~0.65 | 0.17~0.37 | ≤ 0.15 | ≤ 0.30 | ≤ 0.20 | ≤ 0.030 |
20 | 0.17~0.24 | 0.35~0.65 | 0.17~0.37 | ≤ 0.25 | ≤ 0.25 | ≤ 0.20 | ≤ 0.030 | |
Mechanical property | Tensile strength ?(MPa) | Yield strength (MPa) | Elongation(%) | |||||
10 | 335~475 | ≥ 195 | ≥ 24 | |||||
20 | 410~550 | ≥ 245 | ≥ 20 |
Dimension tolerance:
| Dimension | Tolerance | |||
Common grade | Senior grade | ||||
Hot rolled | OD | ≤159 | +1.0%(min+0.50mm) | +1.0%(min+0.5mm) | |
>159 | +1.0% | +1.0% | |||
TH | ≤20 | +15%(min+0.45mm) | +1.0%(min+0.30mm) | ||
>20 | +12.5% | +10% | |||
D≥351Hot expanded | +15% | ||||
Cold drawn/rolled pipe | OD | 10~30 | +0.40mm | +0.20mm | |
>30~50 | +0.45mm | +0.25mm | |||
>50 | +1.0% | +0.75% | |||
TH | 1.5~3.0 | +15% | +10% | ||
>3.0 | +12.5% | +10% |