Carbon Steel Plate & Heavy Sheet
Carbon Steel Plate stands as the backbone of global industrial development. At its essence, it is a robust, versatile material crafted by precisely alloying iron and carbon, engineered to deliver exceptional structural brilliance, high yield strength, and certified impact toughness under demanding engineering environments.
What Is Carbon Steel Plate? The Cornerstone of Structural Brilliance
At its essence, a Carbon Steel Plate is a robust and versatile metal product crafted predominantly from iron and carefully controlled quantities of carbon. Unlike low-alloy or stainless steels that require expensive additions of nickel and chromium, carbon steel achieves high mechanical strength, remarkable hardness, and exceptional ductility purely through metallurgical carbon concentration control and advanced thermo-mechanical rolling processes (TMCP).
Carbon acts as an interstitial hardening element. As carbon content rises, tensile strength and surface hardness elevate significantly, allowing plates to resist severe bending forces.
Through normalized heat treatment and controlled cooling, Yanshan Steel maintains optimal impact toughness down to -40°C, ensuring plates do not experience brittle failure under dynamic loads.
Optimal carbon proportions preserve ductility, enabling fabricators to cut, flame-profile, roll into cylindrical pipe shells, and weld without structural cracking.
Types of Carbon Steel Plate Supplied By Yanshan Steel
When it comes to Carbon Steel Plate, the diversity in types mirrors the vast applications across global industries:
Type A: Structural Steel Plates
Structural steel plates are the backbone of civil construction. Featuring balanced moderate carbon content, they provide the optimal balance of tensile load capacity, ductility, and on-site field weldability for high-rises and bridges.
Type B: Pressure Vessel Quality (PVQ) Plates
PVQ plates are engineered specifically to contain pressurized gases and liquids under thermal gradients. Manufactured with fine grain normalization and strict ultrasonic testing (UT) to prevent fracture under severe fatigue cycling.
Type C: Abrasion Resistant (AR) Plates
Crafted with elevated carbon and manganese-chromium-boron alloying followed by specialized quenching and tempering. Delivers high surface hardness (360 – 500 HBW) to endure severe impact and abrasive gouging.
Type D: High-Strength Low-Alloy (HSLA) Plates
HSLA plates incorporate microalloying elements such as vanadium, niobium, and titanium. They deliver higher yield strength (≥ 345–355 MPa) than mild carbon steel while maintaining low weight and exceptional cold bending formability.
Type E: Shipbuilding & Marine Plates
Engineered specifically to endure the corrosive, dynamic cyclic stresses of marine environments. Tested for Charpy V-notch low-temperature toughness down to -40°C and certified by major international classification societies.
Mechanical Properties & Standards Matrix
Standard heavy plate production grades conforming to ASTM, GB, EN, and international classification society rules.
| Grade Designation | Standard Specification | Yield Strength (Min) | Tensile Strength Range | Elongation | Charpy Impact Toughness | Category |
|---|---|---|---|---|---|---|
| ASTM A36 | ASTM A36/A36M | ≥ 250 MPa | 400 – 550 MPa | ≥ 20% | +20°C ≥ 27J | General Structural |
| Q235B | GB/T 700 | ≥ 235 MPa | 370 – 500 MPa | ≥ 26% | +20°C ≥ 27J | Standard Carbon |
| Q345B / Q355B | GB/T 1591 | ≥ 345 – 355 MPa | 470 – 630 MPa | ≥ 21% | 0°C ≥ 34J | High Strength HSLA |
| ASTM A572 Gr 50 | ASTM A572/A572M | ≥ 345 MPa | ≥ 450 MPa | ≥ 18% | -20°C ≥ 27J | Heavy Engineering |
| ASTM A516 Gr 70 | ASTM A516/A516M | ≥ 260 MPa | 485 – 620 MPa | ≥ 21% | -46°C ≥ 34J | Boiler PVQ |
| S355JR | EN 10025-2 | ≥ 355 MPa | 470 – 630 MPa | ≥ 22% | +20°C ≥ 27J | European Structural |
| NM400 | GB/T 24186 | ≥ 1000 MPa | ≥ 1250 MPa | ≥ 10% | -20°C ≥ 24J | Wear Resistant (400 HBW) |
| AH36 / DH36 | ASTM A131 / CCS | ≥ 355 MPa | 490 – 620 MPa | ≥ 21% | -20°C ≥ 34J | Shipbuilding Plate |
Applications of Carbon Steel Plate Across Industries
From supporting the world's tallest skyscrapers to containing high-pressure steam in power generation plants:
Construction & Infrastructure
Used in structural foundations, heavy building columns, high-rise skyscrapers, highway overpasses, and suspension bridges where heavy compressive and bending loads must be supported safely.
Manufacturing & Heavy Engineering
Integral to heavy equipment fabrication, providing durable bases for CNC machines, industrial presses, bulldozers, forklifts, and large material processing plants.
Energy & Petrochemical Sector
Essential for constructing pipelines, pressure vessels, boilers, and refinery reactors that operate under extreme pressure differentials and thermal gradients.
Shipbuilding & Marine Defense
Manufactured under strict classification society supervision (CCS, ABS, DNV-GL, LR) for vessel hulls, bulkheads, cargo decks, and defense naval structures.
Real-World Engineering Success Stories
Every Carbon Steel Plate from Yanshan Steel represents precision metallurgy embodied in major global infrastructure:
Supplied 12,000 metric tons of high-strength Q355B and S355JR heavy plates (up to 80mm gauge) for suspension bridge main girder box structures, with zero weld defect rate across all ultrasonic inspections.
Provided normalized ASTM A516 Gr 70 PVQ plates for thermal power generation steam drums, tested for high-temperature tensile strength and Charpy V-notch impact toughness at -46°C.
Supplied ABS and CCS certified AH36/DH36 marine plates with through-thickness Z-direction tensile testing (Z25/Z35) preventing lamellar tearing in complex offshore jacket node weldments.
Request Industrial Mill RFQ
Specify technical grades, dimensions, tolerances, and tonnage. Guaranteed engineering quote within 4 business hours.