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St35.8 chemical composition and St35.8 equivalent grade
St35.8 is a German standard (DIN 17175) for seamless carbon steel boiler tubes used in high-pressure service. This standard specifies the technical delivery conditions for the seamless tubes used in boiler, pipeline, pressure vessel, and equipment construction. St35.8 tubes are known for their high quality and reliability in high-pressure applications.
St35.8 chemical composition and Mechanical Properties
The chemical composition of St35.8 steel typically includes the following elements:
- Carbon (C): 0.17% max
- Silicon (Si): 0.10-0.35%
- Manganese (Mn): 0.40-0.80%
- Phosphorus (P): 0.040% max
- Sulfur (S): 0.040% max
|
|
Chemical Composition (%) |
Mechanical Properties |
|
Carbon (C) |
0.17 max |
|
|
Silicon (Si) |
0.10 - 0.35 |
|
|
Manganese (Mn) |
0.40 - 0.80 |
|
|
Phosphorus (P) |
0.040 max |
|
|
Sulfur (S) |
0.040 max |
|
|
Tensile Strength (MPa) |
|
360 - 480 |
|
Yield Strength (MPa) |
|
235 min |
|
Elongation (%) |
|
25 min |
|
Hardness (HB) |
|
143 max |
St35.8 equivalent grade
As for equivalent grades, St35.8 is similar to ASTM A179, EN 10216-2 P235GH, and JIS G3454 STPG370. These grades are used in various industrial applications, and they have similar chemical and mechanical properties, making them interchangeable in certain cases.
St35.8 has several equivalent grades across different standards. Some of these are:
- ASTM A179: This is the equivalent grade in the American standard.
- DIN 17175: St35.8 is a grade specified under this standard.
- JIS G3461: STB 340 is the Japanese equivalent.
- BS 3059 Part II: 360 is the equivalent grade in the British standard.
St35.8 Tubing
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