12Cr1MoV straight seam welded steel pipe

12Cr1MoV welded steel pipe is a high-performance alloy steel product designed to perform reliably under high-temperature and high-pressure conditions. Manufactured using a straight seam welding process, this pipe is widely used across power plants, petrochemical industries, and boiler systems, thanks to its optimized chemical composition and superior mechanical strength.

Key Features of 12Cr1MoV Straight Seam Welded Steel Pipe

Material Composition:

C: ~0.12%

Cr: ~1%

Mo & V: Enhance heat resistance and structural stability
This alloy blend delivers outstanding thermal strength and oxidation resistance.

Mechanical Properties:

Tensile Strength: 440–640 MPa

Yield Strength: ≥ 245 MPa

Stable performance at temperatures up to 580°C
Long-term exposure to elevated temperatures does not compromise structural integrity due to the refining effect of vanadium and the heat-strengthening role of molybdenum.

Manufacturing Highlights of 12Cr1MoV Straight Seam Welded Steel Pipe

Produced using high-frequency electric resistance welding (ERW)

Conforms to standards such as GB/T 5310

Undergoes normalizing + tempering post-weld treatment

Strict quality inspections:

Ultrasonic testing

Eddy current testing

Hydrostatic testing

100% radiographic testing for critical applications

Applications of 12Cr1MoV Straight Seam Welded Steel Pipe

Power Plants: Superheaters, reheaters, and main steam lines

Petrochemical Industry: Furnace tubes, reformer tubes

Performs efficiently under 570°C steam, significantly outlasting carbon steel alternatives (3–5x longer service life)

Cost & Processing Advantages of 12Cr1MoV Straight Seam Welded Steel Pipe

Cost-effective alternative to high-grade martensitic steels (e.g., P91, P92)

Better heat resistance than standard carbon steel (e.g., 20G, Q235)

Ease of installation: Compatible with conventional welding; no complex post-weld heat treatment required (unless specified)

Quality Control Standards of 12Cr1MoV Straight Seam Welded Steel Pipe

Chemical Composition (typical limits):

C: 0.08–0.15%, Si: 0.17–0.37%, Mn: 0.40–0.70%,
Cr: 0.90–1.20%, Mo: 0.25–0.35%, V: 0.15–0.30%

Microstructure: Uniform tempered bainite or pearlite; free from banded structures

Weld integrity: Crack-free, no fusion defects; heat-affected zone hardness ≤120% of base metal

Purchasing Guidelines of 12Cr1MoV Straight Seam Welded Steel Pipe

Confirm compliance with GB/T 5310-2017 or equivalent welded steel standards

Request full quality documentation:

Material certificates

Heat treatment records

NDT reports

Select appropriate heat treatment based on service temperature (normalizing + tempering recommended for >580°C)

Maintenance Tips of 12Cr1MoV Straight Seam Welded Steel Pipe

Avoid exposure to chloride ions during storage

Clean internal surfaces before use

Regular wall thickness & hardness checks recommended, especially at elbows and tees

Innovation & Sustainability of 12Cr1MoV Straight Seam Welded Steel Pipe

Adoption of controlled rolling & cooling improves efficiency and material strength

Advanced welding methods (laser/plasma) enhance weld quality

Integration of digital technologies enables real-time process control and data optimization

Sustainable benefits:

Long service life reduces replacement needs

100% recyclable material

Enhances thermal efficiency, lowering fuel use and emissions