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ASTM A671 CB60
keyword ASTM A671 CB60 Category Steel pipe material Related products Get a quoteTechnical Specification and Application of ASTM A671 CB60 Spiral Steel Pipe
1、 Standards and definitions
Execution standard: ASTM A671 is an electric fusion welding (EFW) steel pipe standard, suitable for medium and low temperature (-29 ℃~+343 ℃) pressure vessels and pipeline systems.
Grade definition: CB60 is a material grade in ASTM A671, where "CB" represents carbon manganese steel and "60" corresponds to a small yield strength of 60 ksi (approximately 414 MPa).
2、 Chemical composition and mechanical properties
Chemical composition
Basic elements: carbon (C) ≤ 0.30%, manganese (Mn) 0.60-1.35%, sulfur (S) ≤ 0.035%, phosphorus (P) ≤ 0.035%, optimize welding performance.
Alloy characteristics: Low sulfur and phosphorus design, reducing the risk of cold brittleness and hot cracking.
Mechanical performance
Yield strength: ≥ 414 MPa (60 ksi).
Tensile strength: ≥ 483-621 MPa (70-90 ksi).
Low temperature toughness: optional -46 ℃ impact test (additional requirements need to be specified).
3、 Production process and testing requirements
Manufacturing process
Spiral forming: It adopts hot-rolled steel strip spiral winding, and the weld is formed by double-sided submerged arc welding (SAW) or electric fusion welding (EFW) process.
Post weld treatment: Stress relief heat treatment is required to prevent cold cracking.
Quality inspection
Non destructive testing: The weld seam requires 100% ultrasonic (UT) or X-ray sampling inspection, in accordance with ASTM A435 standard.
Dimensional tolerance: Outer diameter error ≤ ± 0.75%, wall thickness deviation -5%~+10%.
4、 Application Fields
Chemical and power: medium and low voltage reactor pipelines, boiler supporting pipelines (such as heat exchanger tubes, nuclear power auxiliary systems).
Oil and gas transportation: Low temperature oil and gas gathering and transportation pipelines (non high pressure scenarios).
Municipal engineering: thermal pipeline network, industrial fluid transportation.
5、 Typical products and certifications
Specification range:
Outer diameter: Φ 219- Φ 3620 mm.
Wall thickness: 8-50 mm (conventional thickness 10-25 mm).
Certification documents: ASTM standard material certificate (including measured chemical composition and mechanical properties) and non-destructive testing report are required.
6、 Selection suggestions
Medium matching: It is necessary to clarify the corrosiveness, temperature, and pressure range of the conveyed medium, and if necessary, add anti-corrosion coatings (such as epoxy resin, 3PE).
Low temperature scenario: If used in environments below -46 ℃, additional impact test requirements must be specified.
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