API 5L PSL1 L245 / Grade B
Hot-Rolled Pipeline Steel for ERW Line Pipe Manufacturing
High-quality carbon-manganese hot-rolled steel designed for downstream ERW line pipe production and pipeline applications requiring API 5L PSL1 L245 / Grade B specifications. Manufactured by Hebei Yanshan Iron & Steel Group Co., Ltd. through a documented clean steelmaking and continuous-casting process.
Quick Specifications
API 5L PSL1 L245 / Grade B Pipeline Steel
Hebei Yanshan Iron & Steel Group Co., Ltd. manufactures L245 pipeline steel with a controlled steelmaking and continuous-casting process. Yanshan has specifically documented an L245 pipeline-steel smelting and casting process, including chemical-composition control, nitrogen control, inclusion control and continuous-casting quality management.
The hot-rolled coil is intended for downstream manufacturing of ERW line pipe, where the finished pipe is manufactured and tested according to the applicable API 5L requirements.
★ Key Manufacturing Advantages
- ✓L245 / Grade B pipeline-steel capability: Dedicated production route for energy infrastructure.
- ✓Suitable for downstream ERW pipe: Clean edge slitting and controlled carbon-manganese balance.
- ✓Controlled chemical composition: Narrow microalloying windows (Ti, V, Al) for grain refinement.
- ✓Controlled steelmaking & casting: Low nitrogen and low non-metallic inclusions.
- ✓Heat-level traceability: Unbroken link from liquid melt to final dispatched coil.
- ✓Mill Test Certificate available: Comprehensive original mill inspection records.
- ✓Suitable for international projects: Adaptable to diverse tender and EPC specifications.
- ✓Third-party inspection available: Welcoming SGS, BV, and TÜV by mutual agreement.
Technical Specification: API 5L PSL1 L245 / Grade B
Complete technical parameters governing Yanshan Steel hot-rolled pipeline coils for ERW line pipe manufacturing.
| Parameter | Technical Specification |
|---|---|
| Product Name | API 5L PSL1 L245 / Grade B Pipeline Steel |
| Product Form | Hot-Rolled Steel Coil (HRC) |
| Steel Grade | L245 / Grade B |
| Product Specification Level | PSL1 |
| Reference Standard | API Specification 5L |
| Intended Application | ERW Line Pipe Manufacturing |
| Steel Type | Carbon-Manganese Steel |
| Minimum Yield Strength* | 245 MPa (35,500 psi) |
| Minimum Tensile Strength* | 415 MPa (60,200 psi) |
| Heat Traceability | Yes (Full Heat Traceable) |
| Coil Traceability | Yes (Individual Coil Barcode & Stamping) |
| Mill Test Certificate (MTC) | Available according to order requirements |
| Third-Party Inspection (TPI) | Available by agreement (SGS / BV / TÜV) |
Yanshan L245 Reference Production Chemistry
Yanshan Steel's documented L245 production process specifies a controlled chemical composition designed for L245 pipeline steel.
| Chemical Element | Reference Requirement | Metallurgical Role & Function |
|---|---|---|
| Carbon (C) (C) | 0.09 – 0.14 % | Controlled for optimal tensile strength and weldability |
| Silicon (Si) (Si) | 0.20 – 0.35 % | Deoxidizer providing matrix solid-solution strengthening |
| Manganese (Mn) (Mn) | 0.80 – 1.00 % | Enhances hardenability and fine-pearlite grain structure |
| Phosphorus (P) (P) | ≤ 0.030 % | Strictly limited to prevent cold-embrittlement |
| Sulfur (S) (S) | ≤ 0.030 % | Low sulfur level controlled to minimize sulfide inclusions |
| Titanium (Ti) (Ti) | 0.008 – 0.020 % | Microalloying element for carbonitride grain pinning |
| Vanadium (V) (V) | 0.015 – 0.025 % | Precipitation hardening element enhancing yield strength |
| Soluble Aluminium (Al) (Al_sol) | 0.015 – 0.060 % | Total deoxidation and austenitic grain-refinement agent |
Mechanical Properties: Finished Pipe Reference Requirements
For the resulting API 5L PSL1 L245 / Grade B line pipe, the principal strength and elongation requirements are:
| Mechanical Property | API 5L PSL1 Requirement (SI) | US Customary |
|---|---|---|
| Yield Strength, Min.Measured at 0.5% total extension under load | 245 MPa | 35,500 psi |
| Tensile Strength, Min.Ultimate tensile failure limit of finished pipe | 415 MPa | 60,200 psi |
| Elongation (A in 2" / 50mm)Calculated based on test specimen cross-sectional area | Conforming to API 5L | Conforming to API 5L |
Why L245 / Grade B for Pipelines?
- Balanced Strength:Yield ≥ 245 MPa and tensile ≥ 415 MPa provide reliable mechanical load-bearing capacity for conventional pipeline corridors.
- Superior Welded Performance:Formulated specifically for high-speed automated ERW longitudinal seam fusion with low weld-line inclusion sensitivity.
- Good Forming Characteristics:Controlled carbon and manganese preserve cold bendability and dimensional accuracy across breakdown rolls.
HRC Dimensions (Customer & Project Specific)
Exact HRC dimensions are tailored to the pipe manufacturer's forming mill tooling and project purchase orders.
| Parameter | Available / Requirement Specification |
|---|---|
| Thickness | As per Purchase Order (Customer Specific) |
| Width | As per Purchase Order (Customer Specific) |
| Coil Weight | As agreed (Typical 15 – 28 Metric Tons) |
| Inner Diameter (ID) | As agreed (Typical 610 mm / 760 mm) |
| Outer Diameter (OD) | As agreed according to handling capacity |
| Thickness Tolerance | According to agreed standard (e.g. ASTM / EN / GB) |
| Width Tolerance | According to agreed standard |
| Flatness & Crown | Controlled for smooth automated uncoiling and leveling |
| Camber | According to agreed standard |
| Edge Condition | Mill edge or trimmed edge suitable for ERW processing |
| Surface Condition | Clean, uniform oxide scale suitable for pipe forming |
Manufacturing Process of L245 Pipeline Steel
From raw iron ore smelting in Qian'an to precision coiling and export shipment.
Ironmaking
Iron-bearing ores smelted in high-efficiency blast furnaces yielding hot metal.
Molten Iron Treatment
Desulfurization and thermal conditioning before converter charging.
Converter Steelmaking
Basic oxygen furnace (BOF) smelting with controlled deoxidation and alloy additions.
Secondary Refining
Ladle furnace (LF) and vacuum treatment for inclusion shape and nitrogen control.
Continuous Casting
Dynamic soft-reduction casting into defect-free pipeline slabs with uniform chemistry.
Slab Inspection
Surface scarfing and automated ultrasonic checks before reheat furnace entry.
Hot Rolling
Multi-stand continuous tandem rolling achieving specified gauge and width tolerances.
Controlled Cooling
Laminar run-out table water cooling to achieve fine-grained ferrite-pearlite matrix.
Coiling
High-tension automated mandrel coiling at controlled metallurgical temperatures.
Quality Inspection
Spectrometric heat analysis, dimensional laser gauging, and surface testing.
MTC & Traceability
Heat-to-coil tracking number stamping and certified MTC generation.
Shipment
Eye-to-sky export packaging with seaworthy waterproof wrapping and strapping.
Controlled Steelmaking & Clean Casting Stability
Yanshan Steel's documented L245 production process incorporates controls designed to improve metallurgical quality and casting stability.
Pipeline steel requires rigorous control over metallurgical cleanliness because the raw material subsequently undergoes severe edge cold-forming and high-frequency induction welding. Non-metallic inclusions or excess dissolved nitrogen can cause weld-line porosity or split seams during hydrostatic validation.
The published L245 process reports improvements in nitrogen and inclusion control as well as a product qualification rate above 99% under the described production process.
Critical Quality-Control Areas Include:
Systematic Quality Control & Coil Traceability
Every production batch is subject to rigorous multi-stage physical, chemical, and dimensional inspection.
Chemical Analysis
Heat-level optical emission spectrometry (OES) chemical analysis is performed to verify the exact ladle melt composition against contractual specifications.
Mechanical Testing
Tensile, yield strength, and elongation properties are evaluated across longitudinal and transverse orientations according to the agreed technical specification.
Dimensional Inspection
High-precision laser thickness gauges, width scanners, and crown/camber monitors verify adherence to agreed thickness and width tolerances throughout the strip length.
Surface & Edge Inspection
The coil surface and sheared edges are systematically inspected for scale defects, slivers, or laminations that could interfere with downstream ERW pipe manufacturing.
Heat & Coil Traceability
Individual heat numbers, slab numbers, and coil identification tags are maintained across all production and quality documentation for 100% lifetime traceability.
Certified Mill Documentation
Accompanied by original Mill Test Certificates (MTC), packing lists, and commercial invoices supporting international customs clearance and client audit approvals.
Inspection & Quality Documentation Availability
Complete list of technical certificates and third-party inspection scopes available for project orders.
| Document / Inspection Type | Availability Scope |
|---|---|
| Mill Test Certificate (MTC) | ✓ Available (EN 10204 3.1 Type) |
| Heat Number Traceability | ✓ Stamped & Tagged on Every Coil |
| Coil Number Identification | ✓ Individual Barcode & QR Tracking |
| Chemical Ladle Analysis | ✓ Full OES Spectrometry Batch Data |
| Mechanical Property Test Records | ✓ Verified Tensile & Yield Records |
| Dimensional & Gauge Inspection | ✓ Thickness, Width & Crown Records |
| Surface & Edge Visual Inspection | ✓ Verified Defect-Free Surface |
| Export Packing List | ✓ Itemized Coil Weight & Dimensions |
| Certificate of Origin (CO) | ✓ Available Upon Requirement |
| Third-Party Inspection (TPI) | ✓ Available by Agreement (SGS / BV / TUV) |
Designed for Downstream ERW Pipe Production
The HRC can be supplied as raw material for downstream Electric Resistance Welded (ERW) line pipe manufacturing, subject to the agreed technical specification and pipe manufacturer's qualified production process.
Yanshan Steel Hot-Rolled Coil (HRC)
- • Supplied by steel manufacturer (Yanshan Steel)
- • Hot-rolled coil substrate
- • Controlled steelmaking, continuous casting & hot-rolling
- • Certified Heat/Coil Mill Test Certificate (MTC)
- • Raw material for pipe fabrication
- • Not itself finished API 5L pipe
Finished ERW Line Pipe
- • Manufactured by pipe producer / manufacturing partner
- • High-frequency welded (ERW / HFW) tubular line pipe
- • Forming, high-frequency welding, sizing & hydrostatic hold
- • Pipe Mill Test Certificate & NDT inspection documentation
- • Finished product for field pipeline installation
- • Must independently meet applicable API 5L requirements
⚙️ Typical ERW Line Pipe Manufacturing Process Flow
HRC Coil Uncoiling
Master hot-rolled coil mounted on heavy uncoiler mandrel.
Multi-Roll Leveling
Precision tension leveling to eliminate coil curvature and residual stress.
Slitting & Edge Milling
Rotary shears cut exact strip circumference width with beveled clean edges.
Continuous Roll Forming
Multi-stand breakdown and fin-pass rolls progressively form circular tubular shape.
High-Frequency (HFW) Welding
High-frequency induction/contact current heats strip edges to forge seam.
Weld Bead Scarfing
Internal (ID) and external (OD) carbide cutters remove weld flash smoothly.
Seam Heat Treatment
Post-weld induction normalizing relieves heat-affected zone (HAZ) stress.
Sizing & Straightening
Multi-roll sizing mill achieves exact outer diameter and roundness.
Flying Cut-off
Carbide saw cuts continuous line pipe to standard 6m, 12m, or custom lengths.
Full Hydrostatic Testing
100% full-pipe body pressure hold up to 90% specified minimum yield strength.
Automated NDT (UT/Eddy)
Continuous ultrasonic weld inspection for internal and surface discontinuities.
Final Inspection & MTC
End beveling, dimensional verification, marking, and final finished pipe release.
Typical Applications of L245 / Grade B Pipeline Steel
API 5L PSL1 L245 / Grade B is widely associated with conventional pipeline transportation and municipal energy infrastructure.
Oil Transportation Pipelines
Used in long-distance trunk lines and gathering systems for the transmission of crude petroleum where PSL1 Grade B is specified.
Natural Gas Transmission
Employed in regional distribution grids and intra-facility natural gas transport networks complying with API 5L PSL1 design codes.
Municipal & Industrial Water Aqueducts
Ideal substrate for high-pressure municipal fresh water aqueducts, industrial cooling pipelines, and desalination distribution.
Industrial Process Piping
Conveyance of permitted non-corrosive chemical fluids, slurry lines, and industrial utility fluids across petrochemical complexes.
Energy & Power Plant Infrastructure
Pipeline infrastructure supporting thermal power plants, hydroelectric conduits, and utility distribution manifolds.
Civil & Structural Piling Pipes
Engineered casing pipes, deep foundation piles, and structural tubular members where Grade B strength is specified.
Why Choose Yanshan L245 Pipeline Steel?
Six compelling reasons EPC contractors and pipe manufacturers choose Hebei Yanshan Iron & Steel Group Co., Ltd.
Dedicated L245 Production Capability
Yanshan Steel has specifically documented an L245 pipeline-steel smelting and casting process, developed specifically for pipeline infrastructure requirements rather than commercial hot-rolled sheet.
Controlled Clean Metallurgy
The documented process incorporates strict metallurgical controls for chemical composition, low nitrogen levels, and minimal non-metallic inclusions, ensuring high continuous-casting stability.
Downstream ERW Pipe Compatibility
Specially formulated carbon-manganese balance and clean edges ensure consistent weld forgeability and minimal defect rates during downstream high-frequency induction welding.
Rigorous Heat-Level Traceability
Every single hot-rolled coil maintains an unbroken traceability link back to its original liquid-steel heat, vacuum degassing ladle, and continuous-cast slab.
Comprehensive Quality Documentation
Accompanied by verified Mill Test Certificates detailing chemical ladle analysis, mechanical properties, and dimensional compliance according to contract specifications.
Flexible Third-Party Inspection
Yanshan Steel facilitates factory witness testing and sample auditing by independent international inspection authorities including SGS, Bureau Veritas (BV), and TÜV Rheinland.
Seaworthy Export Packaging & Shipping
HRC can be prepared according to the customer's shipping, storage, and handling requirements to prevent maritime moisture and handling damage.
📦 Export Coil Protection Options
- • Heavy waterproof barrier wrapping paper and VCI anti-corrosion film
- • High-tensile radial and circumferential steel strapping bands
- • Heavy protective steel outer wrapper sheet
- • Internal and external metallic edge corner protection rings
- • Coil eye protection discs to prevent crane hook gouging
- • Weatherproof identification tags with heat number, coil number, and weight
- • Rust-prevention protective oiling treatment where specified
🚢 Multi-Modal Shipping Modes
- • Container Shipment: 20ft heavy-duty containers with wooden saddles and chocking
- • Breakbulk Shipment: Direct mill rail haulage to deep-water berths at Tangshan Port and Tianjin Port
- • Bulk Vessel Shipment: Dedicated charter vessels for large-scale infrastructure project orders
- • Rail Transport: Dedicated marshalling tracks directly at Qian'an Railway Station
Heat → Slab → Coil → MTC → Shipment
Each coil is associated with its original production heat and corresponding quality documentation. This allows customers and downstream pipe manufacturers to maintain seamless traceability throughout the manufacturing and supply chain.
Frequently Asked Questions (FAQ)
Key technical and contractual questions answered transparently for project procurement teams.
Q:What is API 5L L245 / Grade B?
L245 / Grade B is a PSL1 line-pipe grade designation under API Specification 5L, with a specified minimum yield strength of 245 MPa (35,500 psi) and minimum tensile strength of 415 MPa (60,200 psi).
Q:Is L245 the same as Grade B?
Yes. Within the API 5L PSL1 specification, L245 (SI metric unit designation, representing 245 MPa minimum yield) and Grade B (US customary designation) correspond to the exact same strength grade level.
Q:Is this product finished API 5L pipe?
No. The product described on this page is Hot-Rolled Steel Coil (HRC), which serves as the premier raw-material substrate intended for downstream ERW line pipe manufacturing. The finished pipe is manufactured and hydrostatically tested by the pipe producer according to applicable API 5L requirements.
Q:Can the HRC be used for ERW pipe manufacturing?
Yes. Yanshan Steel's L245 HRC is specifically formulated for downstream Electric Resistance Welded (ERW) pipe production, subject to the agreed raw-material technical specification and the pipe manufacturer's qualified forming and welding procedures.
Q:Does Yanshan Steel have documented L245 manufacturing capability?
Yes. Hebei Yanshan Iron & Steel Group Co., Ltd. has specifically documented an L245 pipeline-steel smelting and continuous-casting process. The company's published technical patents detail controls for composition, nitrogen levels, inclusion control, secondary refining, and continuous-casting stability.
Q:Is Yanshan an API 5L Monogram-certified pipe manufacturer?
No, Yanshan Steel does not make unsubstantiated claims. Yanshan Steel manufactures high-quality hot-rolled pipeline steel coils (HRC) used as raw material for pipe makers. We do not claim an API 5L Monogram license for finished pipe unless an active license can be independently verified. This technical precision keeps our supply contractually sound and defensible for international project tenders.
Q:Can a Mill Test Certificate (MTC) be provided?
Yes. Applicable heat-specific Mill Test Certificates and inspection documentation detailing actual ladle chemical composition and mechanical test properties are supplied with every order.
Q:Is third-party inspection (TPI) available?
Yes. Independent third-party inspection (such as SGS, Bureau Veritas, or TÜV) can be arranged by mutual agreement in the sales contract for pre-shipment witness testing, dimensional audits, and lab verification.
Technical Documents Available Upon Request
Looking for API 5L PSL1 L245 / Grade B HRC?
Get in touch with our metallurgical sales engineering desk at Hebei Yanshan Iron & Steel Group Co., Ltd. for product availability, dimensions, quantity, production schedule, and inspection requirements.
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