National Standards
Boiler Tube
Seamless Steel Tubes for Low and Medium Pressure Boiler
Standard
GB3087
Application
It is used for manufacturing heating-pipelines, containers, steaming pipelines of low or medium pressure boilers. (P≤5.88MPa, T≤450℃)
Main Steel Tube Grades
10, 20
Other grades can also be provided after consulting with customers.
Chemical Composition
| Standard | Grade | Chemical Composition | ||||||
| C | Si | Mn | P, S | Cr | Cu | Ni | ||
| GB3087 | 10 | 0.07-0.14 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.25 | 0.25 | 0.25 |
| 20 | 0.17-0.24 | 0.17-0.37 | 0.35-0.65 | 0.035 | 0.25 | 0.25 | 0.25 | |
Mechanical Properties
| Standard | Grade | Mechanical Properties | ||
| Tensile Strength MPa | Yield Strength MPa | Elongation % | ||
| GB3087 | 10 | 335-475 | ≥195 | ≥24 |
| 20 | 410-550 | ≥245 | ≥20 | |
