S235JR black annealed cold-rolled full-hard steel coil is a European standard high-precision cold-rolled structural steel designed for industrial manufacturing. It is a cold-rolled full-hard structural steel that complies with EN 10025-2 standard, with a uniform black oxide film on the surface (not pickled). This product achieves high strength and excellent dimensional accuracy through precision cold rolling process, and has good processing adaptability. It is an ideal choice for mechanical equipment, building structures and other fields
S235JR Black Annealed Cold Rolled Coil Full Hard chemical composition
|
Element |
C |
Mn |
P |
|
Content |
≤0.17% |
≤1.40% |
≤0.035% |
S235JR Full hard Black Annealed Cold Rolled Steel Coil Technical Parameters
|
Item |
parameter |
Test Standards |
|
|
Material Standard |
EN 10025-2 S235JR |
- |
|
|
Tensile Strength (Rm) |
520-620 MPa |
EN ISO 6892-1 |
|
|
Yield Strength (Rp0.2) |
350-420 MPa |
EN ISO 6892-1 |
|
|
Elongation (A50mm) |
8-12% |
EN ISO 6892-1 |
|
|
Hardness |
HRB 75-90 |
EN ISO 6506 |
|
|
Thickness Range |
0.5-4.0mm |
EN 10131 |
|
|
Roll Weight |
5-15 tons/roll |
- |
S235JR Black Annealed Full hard cold rolled steel strip advantages
✅ European standard quality assurance
Strictly in accordance with EN 10025-2 standard
CE certification and ISO 9001 quality management system
✅ Excellent mechanical properties
Tensile strength: 520-620MPa (exceeding S235JR hot rolling standard)
Yield strength: ≥235MPa (measured typical value 350-420MPa)
Hardness range: HRB 75-90
✅ Precision dimensional control
Thickness tolerance: ±0.04mm (≤2mm)
Width range: 600-1600mm (customizable slitting)
Straightness: ≤2.5mm/m
✅ High-quality surface condition
Surface roughness: Ra 1.0-2.0μm
Uniform oxide film: can be directly welded or sprayed
S235JR Full hard CRBA Coil Application Areas
|
Industry |
Typical applications |
Advantages |
|
Construction engineering |
Building frames, bridge support structures, scaffolding, etc. |
High strength ensures the stability of the structure and withstands various complex loads; good welding and processing performance, easy to construct and install |
|
Machinery manufacturing |
Machinery housings, gears, shaft parts, etc. |
High hardness and wear resistance, improve the service life and operation stability of mechanical parts; strong machinability, suitable for a variety of mechanical processing processes |
|
Automobile industry |
Automobile body frames, chassis parts, etc. |
Meet the requirements of lightweight design of automobiles, while reducing the weight of the vehicle body, ensure that the vehicle has reliable safety performance |
|
Hardware products |
Metal furniture, tools, pipe connectors, etc. |
Good processing performance, can produce various shapes, strong and durable hardware products to meet daily use needs |
About Us
Why choose our black annealed cold rolled steel coil?
✨ Strictly control the composition to ensure no cracking during stamping
✨ Uniform thickness, precise tolerance, and reduced scrap rate
GNEE Group strictly follows domestic and international trade practices, regards reputation as life, and provides all customers with the best quality products and the most complete services. The company has established a complete service system and technical support system, not only providing customers with the best quality products, but also providing complete after-sales service.
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