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Cold Rolled Steel Sheet in Coil JIS
Japanese standard cold-rolled steel coil: industrial preferred material for precision manufacturing
Competitive advantages
Precision dimensional control system
| Parameter index | Conventional standard | JIS | Advantage improvement |
|---|---|---|---|
| Thickness tolerance | ±0.05mm | ±0.02mm | 60% improvement in accuracy |
| Width tolerance | ±1.5mm | ±0.8mm | 47% improvement in accuracy |
| Straightness | ≤3mm/m | ≤1.5mm/m | 50% improvement in flatness |
Excellent surface treatment technology
Cold rolled steel coil JIS uses Mitsubishi Heavy Industries' patented rolling process (patent number: JP2020-185634A) to achieve:
- Differentiated control of double-sided zinc layer (single-sided 5-20μm customizable)
- Fingerprint-resistant treatment (compliant with JIS Z 2911 standard)
- Self-repairing passivation film technology (salt spray resistance test ≥ 96h)
Production process
Hot rolling: Starting from hot-rolled steel coils, this is a steel plate that has been rolled at high temperature.
Pickling: The scale on the surface of the steel plate is removed by pickling process to prepare for the next step of cold rolling.
Cold rolling: At room temperature, the pickled steel plate is continuously rolled to obtain hardened coils.
Degreasing: Remove grease and impurities on the surface of the steel plate.
Annealing: The mechanical properties of the steel plate are restored through annealing treatment, softening it and improving its plasticity and toughness.
Flattening: The surface of the steel plate is made flatter and smoother through flattening treatment.
Finishing: Including cutting heads, tails, trimming, leveling, re-rolling or longitudinal shearing of plates, etc., to ensure that the size and shape of the steel plate meet the requirements.
Coating: As needed, the steel plate can be treated with galvanizing, aluminum plating, etc. to improve its corrosion resistance.
The thickness range of cold rolled steel sheet in coil is generally between 0.2mm-4.0mm, and the width and length are determined according to the product requirements.
Applications in various industries
Automobile manufacturing: JIS CRC coil is widely used in the manufacture of automobile bodies, doors, roofs, wheel covers and other parts due to their high strength and excellent forming properties.
Home appliance manufacturing: Due to its high surface finish and good surface quality stability, JIS prime cold rolled steel coil is used in the manufacture of home appliances such as washing machines, refrigerators, microwave ovens, air conditioners, etc.
Construction industry: In the construction industry, jis crc sheet in coil is used in the manufacture of building structures, such as beams, columns, rubber bearings, etc.; they can also be used in the manufacture of building equipment, such as doors and windows, stairs, railings, etc.
Machinery manufacturing: JIS cold rolled steel is excellent mechanical properties and forming properties, and are suitable for the manufacture of structural components, transmission components, hydraulic components, etc. of mechanical equipment.
Procurement Guide
1. Four-dimensional material selection method
1) Demand analysis: clarify the mechanical requirements of the application scenario.
2) Process adaptation: match stamping/welding/painting processes.
3) Cost optimization: balance material grade and processing loss.
4) Certification verification: confirm environmental certifications such as ROHS/REACH.
2. Solutions to common problems
- Welding cracking- Insufficient coating adhesion- Stamping rebound exceeds the standard
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