+86 371 55057610 
inquiry@xsteelplate.com
■ Overview
Xinsteel stockholder GB/T5310 specifications grade 20g seamless steel pipes,20g seamless steel tubes,20g boiler steel pipes,20g boiler steel tubes with varies wall thickness and nominal diameters.These seamless pipes 20G is used int Drain Extraction,platen,superheater,Line sampling boilers,Line Desuperheater for our end users'projects.
■ Full Data
Technical Requirements & Additional Services:
♦ Normalized Heat treatment at Temp.880-940 Deg.C
♦ Flattening test according to GB/T 246
♦ Bending test comply to GB/T 232
♦ Normalized Heat treatment at Temp.880-940 Deg.C
♦ Flattening test according to GB/T 246
♦ Bending test comply to GB/T 232
♦ Expansion test comply to GB/T 242
♦ Microstructure examination comply to GB/T 13298
♦ Issued Orginal Mill test certificate under 3.1/3.2 FORMAT
♦ Surface Protection:Black,Varnish,Hot Dip Galvanized,Coating with shop prime
♦ Microstructure examination comply to GB/T 13298
♦ Issued Orginal Mill test certificate under 3.1/3.2 FORMAT
♦ Surface Protection:Black,Varnish,Hot Dip Galvanized,Coating with shop prime
■ Techicals
►Mechnical property for 20g boiler steel pipes:
|
20G |
|
|
Yield strength (≥Mpa) |
245 |
|
Tensile strength (≥Mpa) |
410-550 |
►Chemical composition for 20g boiler steel pipes (Heat Analysis Max%)
|
Main chemical elements composition of 20G |
|||||
|
C |
Si |
Mn |
P |
S |
Cr |
|
0.17-0.23 |
0.17-0.37 |
0.35-0.65 |
0.025 |
0.015 |
0.25 |
|
Cu |
Ni |
Mo |
V |
Ti |
Zr |
|
0.20 |
0.25 |
0.15 |
0.08 |
- |
- |
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