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TMCP (Thermo-Mechanical Controlled Processing) Steel Plate
Brand: Promisteel
Grade: A25,A,B,X42,X46,X52,X56,X60,X65,X70,X80,X90,X100,X120
MOQ: 25tons
Application: API 5L steel plates are widely used in oil and gas transmission pipelines (onshore, offshore, long-distance, high-pressure) and related fluid transport systems.
Capacity:10000 Ton/month
Delivery: 20-45 days
Payment: T/T, L/C, etc
Meet the Core Needs of Modern Pipe Manufacturing
For steel pipe manufacturers, material performance directly determines production efficiency and long-term safety. In high-pressure transmission, offshore engineering, and extreme environment projects, high strength, low-temperature toughness, and weldability are non-negotiable. Subpar materials may cause welding defects, increased rework, or even service failures-exactly what TMCP steel plates are engineered to eliminate.
The Science Behind TMCP Technology
Thermo-Mechanical Control Processing (TMCP) redefines steel production by integrating controlled rolling and accelerated cooling, eliminating the need for post-production heat treatment:
Precise Rolling
Conducted at 800-1000°C to refine austenite grains, with deformation parameters adjusted by thickness (5-30% reduction per pass).
Accelerated Cooling
Post-rolling cooling at 10-50°C/s locks in a fine-grained ferrite-bainite structure, ensuring uniform performance across the plate.
This process delivers a rare balance of strength and toughness, while cutting energy use compared to traditional heat-treated steel.
Proven Performance: Data Backed by Standards
Our TMCP steel plates are engineered to meet API 5L, DNV-OS-F101, and EN 10216 standards, with performance varying by thickness for precise application matching:
|
Thickness Range |
Tensile Strength |
Yield Strength |
Impact Toughness (-40°C) |
Weldability (Pcm) |
|
6-30mm |
530-620 MPa |
460-550 MPa |
≥ 140 J |
≤ 0.23 |
|
31-80mm |
490-570 MPa |
420-500 MPa |
≥ 120 J |
≤ 0.25 |
|
81-120mm |
460-530 MPa |
400-470 MPa |
≥ 100 J |
≤ 0.27 |
Note: Pcm (welding crack sensitivity index) is used per API 5L standards, ensuring low risk of cold cracks during welding.
Field-Proven Applications
Transcontinental Pipelines
200,000+ tons supplied for the Central Asia-China gas pipeline (operating pressure 10MPa). Compliant with API 5L X70, it reduces welding seams by 25% due to 4.8m width options.
Offshore Pipelines
Deployed in the North Sea's 300m water depth dynamic lay projects (DNV-OS-F101 certified). Withstands cyclic loading (±120MPa) and marine corrosion, validated over 7 years.
Arctic Projects
Used in Siberian oil pipelines, maintaining toughness at -60°C (impact energy ≥ 160 J) with zero material-related failures in 6 years.
Welding Guidelines: Practical Tips for Manufacturers
The weldability of TMCP steel is closely linked to controlled heat input:
Recommended Heat Input Range
5-35kJ/cm. This is critical for ensuring the toughness of the heat-affected zone (HAZ). If the heat input exceeds 35kJ/cm, it may lead to grain coarsening, resulting in a 30% or more reduction in impact strength.
Preheating Requirements
Preheating is not necessary for plates with a thickness of ≤25mm when the ambient temperature is ≥5°C. For thicker plates, preheating to 80-120°C is recommended to prevent hydrogen-induced cracking.
Why Choose Promisteel TMCP Plates?
Contact our technical team to discuss your project's specific thickness, strength, and environmental requirements-we deliver solutions, not just steel.
Technical Expertise
10+ years in TMCP technology, with an in-house metallurgy team developing custom grades.
Sustainability
Eliminating post-rolling heat treatment reduces carbon emissions by 22% compared to traditional quenched-tempered steel-aligned with EU's CEED regulations.
Supply Reliability
600,000 tons annual capacity, with 99% on-time delivery for bulk orders (API 5L, DNV, and ISO 9001 certified).
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