A106C seamless steel pipe strictly complies with the standards of the American Society for Testing and Materials (ASTM) and the American Society of Mechanical Engineers (ASME), implementing ASTM A106/A106M and ASME SA106/SA106M specifications. Designed to withstand high-temperature and high-pressure environments, this pipe is widely used in boilers, power plants, oil refineries, and chemical process industries. Its key advantage lies in the dual assurance of material quality and mechanical strength, making it a reliable choice for demanding industrial applications.
Chemical Composition and Material Properties of ASTM A106C Seamless Steel Pipe
The A106C seamless pipe primarily contains carbon (C), manganese (Mn), and silicon (Si), with carbon≤0.35%, manganese 0.29%–1.06%, and silicon≥0.10%. Harmful impurities such as phosphorus (P) and sulfur (S) are strictly controlled (P≤0.035%, S≤0.035%), while the total amount of copper, nickel, chromium, molybdenum, and vanadium is kept≤1.00% to prevent material embrittlement. In addition, the composition allows flexibility—for every 0.01% reduction in carbon, manganese may increase by 0.06%, but not exceeding 1.35%. This ensures excellent toughness, creep resistance, and durability under continuous high-temperature operation.
Mechanical Strength and High-Temperature Performance of ASTM A106C Seamless Steel Pipe
After hot rolling or cold drawing, the ASTM A106 Grade C seamless steel pipe achieves a tensile strength≥485 MPa, yield strength≥275 MPa, and elongation≥20%, performing reliably at temperatures up to 450°C. Compared with A106 Grade A (tensile≥330 MPa) and A106 Grade B (tensile≥415 MPa), the Grade C pipe offers superior strength and thermal stability. Its performance is comparable to that of Q345 seamless steel pipes (tensile 490–675 MPa, yield≥345 MPa), but through optimized alloy composition and process control, A106C provides enhanced high-temperature stability and longer service life.
Quality Assurance and Testing of ASTM A106C Seamless Steel Pipe
From raw material inspection to final product testing, each A106C seamless steel pipe goes through 12 strict quality inspection steps, including spectral analysis, hydrostatic testing, and ultrasonic flaw detection. This ensures a defect-free internal structure and eliminates issues such as porosity or slag inclusion. Every pipe is supplied with a mill test certificate (MTC), mechanical property report, and third-party inspection certification, ensuring traceable quality and reliable performance for every batch.
Why Choose ASTM A106C Seamless Steel Pipe?
Excellent high-temperature and high-pressure resistance
Superior mechanical strength and toughness
Complies with ASTM and ASME international standards
Widely used in boilers, refineries, and power plants
Certified with complete material and testing documentation
United Steel Industry As the most important steel pipe manufacturer and exporter in China, in the past 20 years, we have completed more than 100 projects, with partners in more than 100 countries, and established relationships with oil and gas and EPC companies in many countries business relationship.
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