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Help CenterSteel Coil & Strip & Hot Rolled Steel Coil，ASTM A36、ASTM A572 Gr50/Gr60、JIS G3101 SS400、JIS G3131 SPHC/SPHD/SPHE、EN 10025 S235JR、S355JR
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1. Product Overview
Hot Rolled Steel Coil (HRC) is produced by continuous rough rolling and finish rolling of heated steel slabs, followed by laminar cooling and coiling. As a fundamental and widely used steel plate material, it features high toughness, good plasticity, excellent weldability, strong formability and cost performance. With flat plate shape, uniform material density and stable internal microstructure, hot rolled coils can be processed via flattening, slitting, bending, stamping and welding. It serves as the core raw material for steel structure engineering, mechanical manufacturing, pipe processing, automobile industry, infrastructure and cold rolling base materials. We provide full-range standard stock and customized production in accordance with GB, ASTM, JIS and EN standards.
Note: Regular supplies include ordinary carbon hot rolled coils and low-alloy hot rolled coils. Pickled coils, patterned coils, weather-resistant coils and pressure vessel coils are available for diverse working conditions.
2. Applicable Standards
Chinese Standards
GB/T 709-2019 Dimensions, shape, weight and permissible tolerances for hot rolled steel plates and strips
GB/T 3274-2017 Hot rolled carbon and low-alloy structural steel plates and strips
GB/T 1591-2018 High strength low alloy structural steels
GB/T 3277 Checkered steel plates, GB 713 Steel plates for boilers and pressure vessels
International Standards
ASTM: A36, A572 Gr50/Gr60
JIS: G3101 SS400, G3131 SPHC/SPHD/SPHE
EN: 10025 S235JR, S355JR
3. Main Material Grades
Carbon Structural Steel
Q195, Q215, Q235B (mainstream grade), Q275, SS400, A36, SPHC/SPHD/SPHE (stamping grade)
High Strength Low Alloy Steel
Q345B/C/D/E, Q355B/C/D/E, Q390, Q420, A572Gr50
Special Purpose Grades
Weathering steel Q235NH/Q355NH, pressure vessel steel Q245R/Q345R, checkered plate, pickled plate
Grade Performance Introduction
Q235B/SS400: Universal grade with balanced toughness and weldability, suitable for most structural and processing parts;
Q355 Series: High-strength low-alloy steel with superior load-bearing capacity for heavy-duty steel structures and mechanical main beams;
SPHC Series: Excellent plasticity for deep drawing and bending, widely used in hardware stamping parts;
Pressure Vessel Grades: Low impurity content and stable toughness, meeting safety standards for pressure-bearing equipment.
4. Production Process
Continuous casting slab inspection → Walking furnace heating → High-pressure water descaling → Multi-pass rough rolling → Precision finish rolling → Laminar cooling → Constant temperature coiling → Online straightening → Surface quality inspection → Edge trimming & slitting → Bundling & packaging → Marking and warehousing
Process Advantages: Continuous high-temperature rolling ensures uniform microstructure, low internal stress, no delamination or cracks, avoiding cracking and deformation during subsequent stamping, bending and welding.
5. Core Technical Parameters
5.1 Size Range
Thickness: 1.5mm～16.0mm (regular stock), customized thick plate up to 30mm
Width: 600mm, 1000mm, 1260mm, 1500mm, 1800mm, 2000mm
Coil Weight: 3.5～29 tons per coil, customized splitting available
Processing Options: Custom flattening, slitting, bending, punching, sandblasting and pickling
5.2 Dimensional Tolerance
Complying strictly with GB/T709-2019 tolerance standards with controllable thickness, width and flatness errors, ensuring flat plate shape for precision processing and large-scale steel structure construction.
5.3 Mechanical Properties (Standard)
Q235B: Yield strength ≥235MPa, Tensile strength 370～500MPa, Elongation ≥26%
Q355B: Yield strength ≥355MPa, Tensile strength 470～630MPa, high load resistance
6. Core Product Advantages
Superior comprehensive processing performance: Balanced plasticity, toughness, weldability and cold bending performance, adaptable to stamping, bending, rolling, cutting and welding without cracking or deformation.
Stable material performance: Dense rolled microstructure without delamination or inclusions, uniform mechanical properties and stable batch consistency for industrial mass production.
High cost performance: Lower cost compared with cold-rolled and alloy plates, serving as the preferred universal steel base material.
Wide compatibility: Ideal upstream base material for cold rolled, galvanized, color coated and galvalume steel coils.
Excellent surface quality: High-pressure descaling ensures clean and flat plate surface with few defects, improving coating adhesion.
Complete specifications & flexible customization: Full coverage of thickness and width with customized flattening and slitting services.
7. Main Application Fields
Steel Structure Engineering: Factory beams, columns, trusses, curtain wall structures, bridge auxiliary components;
Mechanical Manufacturing: Equipment bases, frames, housings, construction machinery parts;
Pipe Processing Industry: Base material for spiral welded pipes, straight seam welded pipes and structural hollow sections;
Automobile & Hardware Industry: Automotive chassis parts, stamping components and sheet metal parts;
Pressure Vessel & Equipment: Storage tanks, heat exchangers and atmospheric pressure vessel plates;
Deep Processing Base Material: Raw material for cold rolling, galvanizing and color coating production;
Municipal Infrastructure: Guardrails, manhole covers, enclosure and road engineering parts.
8. Quality Inspection Items
All hot rolled coils are inspected batch by batch in strict accordance with national and international standards:
Visual inspection: Free of cracks, bubbles, scars, inclusions and severe oxidation defects;
Dimensional inspection: Thickness, width, flatness, coil shape and edge quality verification;
Physical & chemical test: Spectrum analysis, tensile test, yield strength, elongation and cold bending test;
Impact test: Normal & low-temperature impact test for high-grade Q355D/E;
Non-destructive testing: Ultrasonic inspection to eliminate internal delamination defects.
9. Packaging & Marking
Domestic Delivery: Reinforced steel strip binding with edge protection; each coil attached with labels of specification, grade, heat number and certificate.
Export Packaging: Waterproof & rust-proof paper + PE film wrapping + galvanized steel strip reinforcement with corner protection. Custom shipping marks including standard, grade, size, weight and origin are available.
Delivery Documents: Chinese & English material certificate, mechanical property report and factory inspection report.
10. Delivery Lead Time & MOQ
Regular stock grades (Q235B/Q355B/SS400): Shipment within 3–7 working days;
Special grades, customized thickness, pickling, flattening & slitting processing: 10–18 working days;
Small trial orders acceptable; full-container and bulk project orders enjoy priority production.
11. Important Notes
Ordinary Q235 is not suitable for low-temperature and heavy-load conditions. Q355D/E with low-temperature impact resistance is recommended for alpine and high-load projects to avoid brittle fracture.
Slight surface oxide scale is normal for hot rolled coils. Pickling and sandblasting are recommended for painting and precision processing.
Store coils in dry and ventilated areas; avoid long-term outdoor rain exposure and humid stacking to prevent rusting.
Stamping and bending parameters shall match material plasticity; avoid rapid cold bending of high-strength low-alloy steel to prevent cracking.
Welding procedures and matching welding consumables must be adopted to ensure structural welding strength.
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