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 |
