1. What is ASTM A671 CJB115 Class 32 Steel Pipe?
ASTM A671 CJB115 Class 32 is a high-strength electric-fusion-welded (EFW) carbon steel pipecritical high-pressure applications (service temperature above -20℃F/-29℃). The "Class 32" designation indicates a minimum yield strength of 32 ksi (221 MPa), making it suitable for demanding industrial systems requiring enhanced mechanical performance.
2. Key Material Properties?
Yield Strength: >=32 ksi (221 MPa)
Tensile Strength: 100-120 ksi (690-827 MPa)
Carbon (C): <=0.35%
Manganese (Mn): 1.25-1.55%
P/S: <=0.030%
3. Typical Applications?
High-pressure hydraulic systems (3000+ psi)
4. How does it compare to Class 31 and Class 35?
| 31 | 31 ksi | High-pressure standard |
| 32 | 32 ksi | |
| 35 | 35 ksi | Specialized extreme-pressure |
5. Fabrication Requirements?
Preheat (400℃F min.) + PWHT (1100-1250℃F)
Hydrostatic (2.5x design pressure) + 100% RT/UT
Hot bending required for thickness >0.5"
