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A515/A515M Gr70
keyword A515/A515M Gr70 Category Steel pipe material Related products Get a quoteA515/A515M Gr70 material spiral steel pipe
1、 Material characteristics
Chemical composition
Carbon (C): ≤ 0.28% (control carbon equivalent to optimize weldability)
Manganese (Mn): 0.98%~1.46% (enhances thermal processing performance and toughness)
Phosphorus (P) and sulfur (S): both ≤ 0.035% (reducing the risk of hot cracking)
Silicon (Si): 0.13%~0.45% (assisted deoxidation strengthening)
Mechanical properties
Tensile strength: ≥ 450MPa (some specifications reach 550~720MPa)
Yield strength: ≥ 240MPa (higher when thickness ≤ 50mm)
Elongation rate: ≥ 19% (gauge length 200mm)
High temperature resistance: Suitable for high temperature environments below 400 ° C, with a long service life
2、 Production process
Raw material processing
Thickness range: 6-120mm (regular stock 10-100mm), supports large diameter pipes (DN200~DN3800)
Preprocessing: Leveling, trimming, surface cleaning, rolling accuracy
Forming and Welding
Spiral winding: forming angle 50 °~75 °, weld seam gap ≤ 3mm
Welding process: Double sided submerged arc welding (DSAW) or high-frequency resistance welding (ERW), using low hydrogen welding materials (such as H08MnA)
Quality inspection
Non destructive testing: 100% ultrasonic testing (UT) or X-ray testing (RT)
Hydrostatic test: pressure ≥ 1.5 times the design pressure, holding pressure ≥ 10 seconds
3、 Application scenarios
Energy transmission
Oil/gas pipelines: high pressure resistance (design pressure ≤ 6.4MPa) and good corrosion resistance
High temperature fluid transportation: suitable for scenarios such as boiler steam drums and thermal pipelines
Industrial equipment
Chemical vessels: supporting pipelines for pressure vessels such as reactors and storage tanks
Steel structure engineering: Spiral welded pipes for pile foundations and supporting structures (in accordance with SY/T5040-2008 standard)
4、 Execution standards and suppliers
Core standards
Material standard: ASTM A515/A515M (American standard container steel plate)
Steel pipe standards: API 5L (line pipe), GB/T 9711 (oil and gas transmission pipe)
Supply services
Through strict process control and standardized testing, A515/A515M Gr70 spiral steel pipes can meet the needs of medium and high pressure energy transmission and high-temperature industry, with a focus on welding quality and anti-corrosion performance.
ADD：Chengnan Industrial Development Zone, Yanshan County, Hebei Province
Domestic phone number：0086-317-6689999
International call：0086-317-6165555
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