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Stardard Specification for Seamless Ferritic and Austenitic Alloy-Steel Boiler,Superheater,and Heat-Exchanger Tubes.
Application:
For manufacturing wall panel,economizer,superheater and steam pipeline of boilers,etc.
Details
Size:
O.D.:1/2~7in.( 12.7~177.8mm) W.T.: 0.085~1.000in.(2.2~25.4mm) Length: Max.17000mm
Steel Grade and Chemical Composition(%)
| Grade |
C |
Mn |
P≤ |
S≤ |
Si |
Cr |
Mo |
| T11 |
0.05-0.15 |
0.30-0.60 |
0.025 |
0.025 |
0.50-1.00 |
1.00-1.50 |
0.44-0.65 |
| T12 |
0.05-0.15 |
0.30-0.61 |
0.025 |
0.025 |
≤0.50 |
0.80-1.25 |
0.44-0.65 |
| T22 |
0.05-0.15 |
0.30-0.60 |
0.025 |
0.025 |
≤0.50 |
1.90-2.60 |
0.87-1.13 |
Mechanical Properties
| Grade |
Yield Point(Mpa)≥ |
Tensile Point(Mpa)≥ |
| T11 |
205 |
415 |
| T12 |
220 |
415 |
| T22 |
205 |
415 | | 
