Seamless Steel Tubing DIN 17175 St35.8, St45.8 Heat resisting Tube
Stamdard: DIN17175
Main steel grades: St35.8, St45.8
Application: For high-pressure boilers(working pressure is generally 9.8 Mpa above, working temperature is between 450 °C and 650 °C) hot surface pipes, coal economizers, superheaters, reheaters, petrochemical industry etc.
Chemical Requirements & Mechanical Proterties:
| Grade |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
| St35.8 |
≤0.17 |
0.10-0.35 |
0.40-0.80 |
≤0.040 |
≤0.040 |
/ |
/ |
| St45.8 |
≤0.21 |
0.10-0.35 |
0.40-1.20 |
≤0.040 |
≤0.040 |
/ |
|
| Grade |
Yield Strength (Mpa) |
Tensile Strength (Mpa) |
Elongation(%) |
| St35.8 |
≥235 |
360-480 |
25 |
| St45.8 |
≥255 |
410-530 |
21 |
Mark: As required.
Inspection and Test: chemical composition test, mechanical properties test(tensile, yield, elongation), process properties test(flatting, flaring, bending, hardness, impact, etc.), appearance and size test, non-destructive inspection test, hydrostastic test.
Delivery status: Annealed, normalized, normalized+Tempered, etc.
End: plain end, beveled end, threaded
End protection: plastic caps
Outside coating: black painting, anti-corrosion oil,galvanized finish, finish as per customer requirements.
Packing: Exporting package/wooden box /as requirement.
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