Along with the years of entrepreneurial journey of Zhongyuan people, she gradually formed her own spiritual pillar and behavioral norms. In the silent inheritance, she guided Zhongyuan Company towards a more brilliant tomorrow.
A516/A516M Gr70
keyword A516/A516M Gr70 Category Steel pipe material Related products Get a quoteChemical and Performance Analysis of A516/A516M Gr70 Spiral Steel Pipe
1、 Chemical composition
Carbon (C): ≤ 0.30% (balanced strength and weldability)
Silicon (Si): 0.13%~0.45% (enhanced deoxidation effect)
Manganese (Mn): 0.79%~1.30% (improves thermal processing performance and toughness)
Phosphorus (P) and sulfur (S): both ≤ 0.035% (suppressing thermal crack sensitivity)
2、 Mechanical properties
Tensile strength: 485~620 MPa (meets the requirements of medium and high pressure pipelines)
Yield strength: ≥ 260 MPa (higher when thickness ≤ 50mm)
Elongation rate: ≥ 17% (gauge length 200mm, ensuring plastic deformation capacity)
Low temperature toughness:- Qualified impact performance at 46 ° C (suitable for cold environments)
Hardness: ≤ 200 HB (Brinell hardness, processability)
3、 Key performance characteristics
Weldability: Suitable for double-sided submerged arc welding (SAW) and high-frequency resistance welding (ERW), requiring the use of low hydrogen welding materials and controlled preheating temperature
Corrosion resistance: Suitable for corrosive media environments such as hydrogen sulfide (H ₂ S) through component optimization (such as low sulfur and phosphorus control) and surface treatment
Hydrogen induced cracking (HIC) resistance: Some models (such as the HIC version) enhance their hydrogen corrosion resistance through special processes
4、 Application scenarios
Energy transmission: natural gas, oil pipelines (design pressure ≤ 6.4 MPa)
Industrial equipment: boiler drum, pressure vessel (storage tank, reactor), thermal pipeline network
Special environment: pipeline systems in cold regions (-46 ° C) and sulfur-containing oil and gas fields
5、 Execution standards and testing
Material standard: ASTM A516/A516M (American standard pressure vessel steel)
Quality verification: X-ray inspection of welds, ultrasonic testing (UT), hydrostatic testing (≥ 1.5 times design pressure), and low-temperature impact testing
Through strict composition control and standardized processes, A516/A516M Gr70 spiral steel pipes possess high strength, low-temperature toughness, and corrosion resistance, making them suitable for energy transmission and industrial equipment manufacturing under complex working conditions.
ADD：Chengnan Industrial Development Zone, Yanshan County, Hebei Province
Domestic phone number：0086-317-6689999
International call：0086-317-6165555
E-mail:9905791@qq.com
