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USt 37.0-1.0253
keyword USt 37.0-1.0253 Category Steel pipe material Related products Get a quoteAnalysis of Chemical and Mechanical Properties of USt 37.0/1.0253 Spiral Steel Pipe
1、 Chemical composition
Carbon (C): 0.17%~0.20% (upper limit 0.17% for thickness ≤ 16mm, upper limit 0.20% for 16mm<thickness ≤ 100mm)
Silicon (Si): ≤ 0.40% (used for deoxidation strengthening, specific content adjusted according to melting analysis)
Manganese (Mn): ≤ 1.50% (improves thermal processing performance and strength, actual content depends on process requirements)
Phosphorus (P) and sulfur (S): both ≤ 0.035% (strictly controlling harmful elements to reduce the risk of cold brittleness and hot cracking)
2、 Mechanical performance
Tensile strength: ≥ 370 MPa (meets the strength requirements of ordinary structural steel)
Yield strength: ≥ 235 MPa (typical value for thickness ≤ 16mm)
Elongation rate: ≥ 22% (with a gauge length of 5 times the sample diameter to ensure plastic deformation capacity)
Impact toughness: ≥ 27 J at room temperature (suitable for general industrial environments, low-temperature toughness requires additional verification)
Hardness: ≤ 170 HB (Brinell hardness, processing and welding performance)
3、 Key performance characteristics
Weldability: Suitable for submerged arc welding (SAW) and high-frequency welding (ERW), requiring controlled preheating temperature (100-200 ° C) and the use of low hydrogen welding materials
Corrosion resistance: Basic corrosion protection relies on surface treatment (such as sandblasting and coating), and additional protection is required in high sulfur environments
Molding ability: The spiral forming process allows for room temperature bending, with a molding angle range of 50 °~75 °
4、 Application scenarios
Building structure: static load components such as load-bearing beams and support columns
Mechanical manufacturing: low stress components such as equipment frames and conveyor rollers
Basic engineering: bridge pile foundation, dock pile pipe (requiring anti-corrosion treatment)
5、 Execution standards and testing
Material standard: German DIN 17100-1980 (ordinary structural steel)
Quality verification: Tensile testing, impact testing, and ultrasonic testing (UT) are required for weld X-ray inspection
This material spiral steel pipe is based on low-carbon components, balancing strength and processing performance, and is suitable for general industrial and construction fields, but additional protection requirements should be noted in high corrosion or extreme low temperature environments.
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