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Help CenterSteel Coil & Strip & Hot Rolled Coil，SPHC、Q235B、SS400、A36
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1. Product Overview
Hot rolled coils take continuous casting slabs as raw material, produced by high-temperature recrystallization rolling at 1100–1250℃. Raw materials only include carbon steel and high-strength low-alloy steel without stainless steel. Featuring excellent plasticity, toughness and weldability with cost-effective performance, coils can be further processed into hot rolled plates, narrow strips and pickled coils via flattening, slitting and shearing. They are essential upstream raw materials for steel structure, construction machinery, automobile, pipeline and light industry sectors.
Application Scenarios
Factory steel structures, bridges, tower cranes, dump truck frames, agricultural machinery parts, container base plates, pressure vessel shells, base material for oil & gas transmission pipes, raw strips for guardrail tubes, mechanical stamping parts, boiler auxiliary components, ship deck structural parts, storage racks.
Delivery Lead Time
Standard spot sizes can be delivered within 5-7 days; customized orders with special thickness, extra wide width, high-strength alloy or special surface treatment take 10-15 days, shipped in full containers from Tianjin Port.
2. Executive Standards & Common Steel Grades
Domestic Standards
GB/T 700, GB/T 1591, GB/T 3274, GB/T 14164 (line pipe steel), GB/T 19189 (steel for pressure vessels)
International Standards
ASTM A36, A572 Gr50; EN 10025-2; JIS G3101, G3131; API 5L
Common Grades (Carbon & Low Alloy Steel)
Ordinary carbon structural steel: Q195, Q215, Q235B/C/D, Q275
HSLA high strength low alloy steel: Q345B/C/D/E, Q390, Q420, Q460, Q500
Line pipe dedicated coils: L245, L290(X42), L360(X52), L415(X60), L485(X70)
Foreign equivalent grades: SS400, SM490, S235JR, S355JR, A36, A572Gr50
3. Specifications
Thickness: 1.5mm–25.4mm
Width: 600mm–2200mm, custom narrow width via slitting available
Coil weight: 8–32 tons per coil, small split coils upon request
Inner coil diameter: Φ508mm, Φ610mm standard sizes
Delivery condition: Hot rolled black scale, hot rolled pickled, TMCP thermomechanical controlled rolling
Processing options: Cut to length flat plate, longitudinal slitting, shearing, bending & stamping
4. Manufacturing Process
Continuous casting slab storage → furnace heating → high-pressure water descaling to remove oxide scale → reciprocating rough rolling → continuous finishing mill → laminar rapid cooling → constant tension coiling → on-line dimension & surface inspection → marking & warehousing → deep processing as required → packing & deliveryHigh-temperature recrystallization rolling eliminates internal stress for uniform microstructure, free from lamination and inclusion defects.
5. Core Performance Advantages
Superior cold forming capacity: Suitable for bending, stamping, pipe coiling and punching without cracking
Stable welding performance: Compatible with submerged arc welding, MIG welding and spot welding; weld strength matches base metal
Balanced toughness at low & normal temperature: Q355D/E and line pipe grades pass low-temperature impact test for cold-region construction
Complete thickness & width range for heavy machinery and large steel structures
Multiple semi-finished products available after secondary processing to reduce customers’ raw material cost
6. Full Inspection for Every Coil
Spectral chemical composition test before rolling to strictly control carbon, manganese, silicon and alloy elements
Mechanical tensile test, yield strength, elongation and low-temperature impact test
Cold bending forming test
Ultrasonic lamination inspection to detect internal delamination and slag inclusion
On-line thickness & width measurement for dimensional verification
Visual surface inspection to eliminate cracks, scabs, holes and indentationsMaterial test report, mechanical inspection certificate and quality guarantee certificate are supplied for each coil.
Quality Warranty
Full replacement or compensation available for defective products caused by unqualified chemical composition, out-of-tolerance dimension, internal lamination and surface flaws.
7. Surface Treatment & Packing
Surface finish: Standard hot rolled black oxide scale; pickled bright surface without scale
Anti-rust treatment: Anti-rust oil coated on coil outer surface, end faces covered by protective film against moisture
Packing: Reinforced by steel straps in radial & circumferential directions, wrapped with waterproof plastic film and tarpaulin; steel coil corner protectors prevent collision during lifting, moisture-proof packing for sea container transportation.
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