Editorial Technical Reference

Cold Rolled Steel Strip

This page explains how Cold Rolled Steel Strip is classified within Fabricated Metal Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Precision-rolled flat steel product with uniform thickness and smooth surface finish

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Product Specifications

Technical details and manufacturing context for Cold Rolled Steel Strip

Definition
Cold rolled steel strip is a semi-finished industrial metal product manufactured by cold rolling hot-rolled steel through precision rollers at room temperature. This process produces material with superior dimensional accuracy, tighter thickness tolerances, and enhanced surface quality compared to hot-rolled alternatives. It serves as a fundamental raw material for numerous secondary manufacturing processes across multiple industries. The cold working process increases the material's strength and hardness while maintaining excellent formability characteristics. Typical applications include automotive components, electrical appliances, furniture, and general engineering. The strip is available in low carbon steel and high strength low alloy steel grades. Key parameters include thickness from 0.15 to 3.0 mm, width from 10 to 600 mm, tensile strength from 270 to 550 MPa, yield strength from 140 to 350 MPa, elongation from 20 to 45%, hardness from 85 to 95 HRB, surface finish from 0.4 to 1.6 μm Ra, flatness ≤3 mm/m, edge condition as mill or slit edge, coating options of none, oiled, or phosphate, coil weight from 3 to 10 t, and inner diameter of 508 or 610 mm. These values are reference ranges and must be verified for specific applications. The product is typically supplied in coil form. For detailed specifications, refer to standards such as GB/T 708 for dimensions, GB/T 228.1 for mechanical properties, GB/T 230.1 for hardness, and GB/T 2523 for surface finish. Always confirm model-specific values and standards with the legal manufacturer or supplier.
Working Principle
Hot-rolled steel coil is processed through a series of precision rollers at ambient temperature, reducing thickness through plastic deformation while improving surface finish and mechanical properties. The cold rolling process increases strength and hardness through strain hardening, while maintaining good formability. The strip is then typically annealed or skin-passed to achieve desired properties. The process ensures tight thickness tolerances and a smooth surface, making it suitable for subsequent forming operations.
Common Materials
Low Carbon Steel, High Strength Low Alloy Steel
Technical Parameters
ParameterTypical rangeNotes & selection driver
ThicknessRequired0.15–3.0 mmNominal material thicknessGB/T 708
WidthRequired10–600 mmMaterial width dimensionGB/T 708
Tensile StrengthRequired270–550 MPaMaximum stress material can withstand while being stretchedGB/T 228.1
Yield StrengthRequired140–350 MPaStress at which material begins to deform plasticallyGB/T 228.1
ElongationRequired20–45 %Percentage increase in gauge length at fractureGB/T 228.1
Hardness85–95 HRBRockwell B scale hardness measurementGB/T 230.1
Surface Finish0.4–1.6 μm RaSmooth finish for painting or platingGB/T 2523
Flatness≤3 mm/mMeasured over 1000mm lengthGB/T 708
Edge ConditionMill edge or slit edgeSlit edge has no burrs
CoatingNone, oiled, or phosphateOiled prevents rust; phosphate aids forming
Coil Weight3–10 tTypical coil weight for handling
Inner Diameter508 or 610 mmStandard coil ID

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Steel Base Metal Part
    Primary structural material providing mechanical properties
    Material: Iron-carbon alloy with controlled composition
  • Protective Coating Optional Part
    Prevents corrosion during storage and transport
    Material: Oil or temporary corrosion inhibitor

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Cold Rolled Steel Strip.

cold rolled strip steel CR strip precision steel strip

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Not pressure-rated (structural/mechanical application only)
other spec: Thickness tolerance: ±0.005mm to ±0.1mm depending on grade, Surface roughness: Ra 0.1μm to 1.6μm
temperature: -40°C to 200°C (continuous), up to 400°C (intermittent)
Media Compatibility
✓ Dry industrial atmospheres ✓ Hydraulic fluid systems ✓ Automotive chassis components
Unsuitable: Chloride-rich marine environments (accelerated corrosion)
Sizing Data Required
  • Required tensile strength (MPa)
  • Required thickness tolerance (±mm)
  • Required surface finish specification (Ra value)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Surface corrosion and pitting
Cause: Exposure to moisture, corrosive chemicals, or improper storage leading to oxidation and localized material loss, compromising structural integrity and surface finish.
Edge cracking and delamination
Cause: Excessive residual stresses from cold rolling process, improper handling causing mechanical damage, or material inhomogeneities leading to stress concentration and separation at edges or layers.
Maintenance Indicators
  • Visible rust spots, discoloration, or white powdery deposits on the steel surface indicating active corrosion
  • Audible cracking or popping sounds during handling or processing, suggesting internal stress relief or material failure
Engineering Tips
  • Implement controlled storage environment with humidity below 50% and apply protective coatings or vapor corrosion inhibitors to prevent moisture-induced degradation
  • Regularly inspect and deburr edges using proper tools, and ensure gradual stress relief through controlled annealing cycles to maintain material uniformity and prevent crack propagation

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ASTM A109/A109M - Standard Specification for Steel, Strip, Carbon, Cold-Rolled ISO 3574 - Cold-reduced carbon steel sheet of commercial and drawing qualities EN 10139 - Cold rolled uncoated mild steel narrow strip for cold forming

Quoted from the published standard.

Manufacturing Precision
  • Thickness: +/- 0.01mm to +/- 0.05mm depending on grade
  • Width: +/- 0.1mm to +/- 0.5mm depending on dimension
Quality Inspection
  • Tensile Testing (Yield Strength, Ultimate Tensile Strength, Elongation)
  • Surface Roughness Measurement (Ra value verification)

Manufacturers of Cold Rolled Steel Strip

Manufacturer profiles associated with Cold Rolled Steel Strip.

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Supply Chain Commonly Integrated Components

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Welding Fixture / Jig

A specialized tooling device used to hold and position metal components during welding operations to ensure dimensional accuracy and repeatability.

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Clamping Fixture

A mechanical device used to securely hold and position workpieces during welding operations.

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Frequently Asked Questions

What are the typical thickness and width ranges for cold rolled steel strip?

According to the directory data, the nominal thickness ranges from 0.15 to 3.0 mm, and the width ranges from 10 to 600 mm, as per GB/T 708. These are reference ranges; actual values depend on the specific product and must be confirmed with the supplier.

What mechanical properties can be expected?

The listed tensile strength is 270–550 MPa, yield strength 140–350 MPa, elongation 20–45%, and hardness 85–95 HRB, per GB/T 228.1 and GB/T 230.1. These are typical ranges and should be verified for the specific grade and condition.

What surface finish and flatness are available?

Surface finish ranges from 0.4 to 1.6 μm Ra (GB/T 2523), and flatness is ≤3 mm/m over 1000 mm length (GB/T 708). These parameters are important for painting or plating applications.

What edge conditions and coatings are offered?

Edge condition can be mill edge or slit edge, and coating options include none, oiled, or phosphate. These affect corrosion resistance and formability. Confirm availability with the supplier.
Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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