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Quality 420 Stainless Steel Cold Rolled Sheet Precision Dimension Bright Surface Finish factory
Quality 420 Stainless Steel Cold Rolled Sheet Precision Dimension Bright Surface Finish factory

420 Stainless Steel Cold Rolled Sheet Precision Dimension Bright Surface Finish

Basic Properties
Place of Origin: MADE IN CHAINA
Brand Name: Baosteel，TISCO
Certification: EN 10204 Type 3.1 / 3.2 available
Model Number: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507
Trading Properties
Minimum Order Quantity: 100kg
Price: Negotiable (Request a Quote)
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Ability: 10000tons
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420 Stainless Steel Cold Rolled Sheet

Stainless Steel Cold Rolled Sheet Precision

420 SS Sheet Bright Finish
Product Summary
420 cold-rolled stainless steel sheet is a high-carbon martensitic stainless steel produced through precision cold rolling processes. The cold rolling operation imparts superior surface finish, tight dimensional tolerances, and enhanced mechanical properties compared to hot-rolled equivalents. This ...

Product Details

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420 Stainless Steel Cold Rolled Sheet

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Stainless Steel Cold Rolled Sheet Precision

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420 SS Sheet Bright Finish
Country Of Origin: MADE IN CHAINA
Brand: Baosteel，TISCO
Certifications: ISO/EN 10204 Type 3.1 / 3.2 Available
Grade: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH)
MOQ: 100kg
Price: Negotiable (Request A Quote)
Packaging: Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag
Delivery Time: 15-25days
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Capacity: 10000tons
Product Description

420 cold-rolled stainless steel sheet is a high-carbon martensitic stainless steel produced through precision cold rolling processes. The cold rolling operation imparts superior surface finish, tight dimensional tolerances, and enhanced mechanical properties compared to hot-rolled equivalents.

This grade offers high hardness (after heat treatment), good wear resistance, and moderate corrosion resistance. It is widely used in applications requiring a combination of sharp cutting edges, durability, and a smooth, bright surface.

Key Features of Cold-Rolled 420 Sheet
Feature Benefit
Precise dimensional accuracy Tight thickness tolerances (±0.03mm to ±0.05mm)
Excellent surface finish Smooth, bright, or matte finishes (2B, BA, No.4, HL)
Improved mechanical properties Higher strength and uniformity due to work hardening
Superior flatness Suitable for precision stamping and forming
Consistent quality Uniform microstructure and performance across the coil
Chemical Composition (wt%)
Element Content Range
Carbon (C) 0.15% – 0.36%
Chromium (Cr) 12.00% – 14.00%
Manganese (Mn) ≤ 1.00%
Phosphorus (P) ≤ 0.040%
Sulfur (S) ≤ 0.030%
Silicon (Si) ≤ 1.00%

Note: The carbon content allows hardening by heat treatment to achieve HRC 50–55. Chromium provides moderate corrosion resistance.

Product Specifications
Parameter Range / Details
Material Grade 420 Stainless Steel (Martensitic)
Manufacturing Process Cold Rolled (CR)
Thickness 0.3 mm – 6.0 mm (typical cold rolled range)
Thickness Tolerance ±0.03 mm to ±0.05 mm (depending on thickness)
Width 500 mm – 1500 mm (slit or mill edge)
Width Tolerance 0 / +3 mm (slit edge)
Length Coil form: as required (typically 50–500 kg coils)
Sheet form: 1000–4000 mm (cut-to-length)
Flatness ≤ 3 mm per meter (or as agreed)
Surface Finish 2B, BA, No.4, HL, Mirror (No.8), or custom
Delivery Condition Annealed (soft) – suitable for further forming and heat treatment
Hardness (Annealed) ≤ HB 235
Hardness (Heat Treated) HRC 50 – 55
Density 7.75 g/cm³
Surface Finishes for Cold-Rolled 420 Sheet
Finish Code Description Typical Application
2B Smooth, matte grey finish produced by cold rolling, followed by annealing and pickling General industrial, stamping, forming
BA (Bright Annealed) Mirror-bright, reflective finish obtained by bright annealing in a controlled atmosphere Decorative household appliances
No.4 Brushed / satin finish (120-320 grit) Architectural panels, kitchen equipment
HL (Hairline) Long, continuous brush lines Elevator panels, decorative trim
No.8 (Mirror) Highly reflective mirror finish Cosmetic packaging, high-end decoration

Other finishes (including embossed, patterned, or coated) are available upon request.

Mechanical Properties
Condition Tensile Strength (MPa) Yield Strength (MPa) Elongation (%) Hardness
Annealed (Cold Rolled) 550 – 750 300 – 450 15 – 25 ≤ HB 235
Quenched & Tempered 800 – 1000 600 – 800 8 – 12 HRC 50 – 55

Note: Mechanical properties vary with carbon content and heat treatment parameters. Values shown are typical.

Heat Treatment
Process Temperature Cooling Medium Resulting Hardness
Annealing 750 – 800°C Furnace slow cool ≤ HB 235
Hardening 980 – 1040°C Oil or air HRC 50+
Tempering 150 – 370°C Air HRC 50 – 55 (adjustable)

Caution: Avoid tempering in the range of 400–600°C (temper embrittlement zone).

Advantages of Cold Rolling for 420 Sheet
Aspect Cold Rolled Advantage
Surface Quality Smooth, defect-free surface, ideal for decorative and precision applications
Dimensional Accuracy Tight thickness tolerances (±0.03mm), suitable for high-volume stamping
Mechanical Consistency Uniform hardness and strength across the entire coil
Work Hardening Higher as-rolled strength (if supplied non-annealed, e.g., hard or half-hard tempers)
Formability Annealed cold-rolled sheet offers excellent formability for bending, drawing, and stamping
Typical Applications – Cold-Rolled 420 Sheet
Industry Specific Application Recommended Finish
Cutlery & Blades Kitchen knives, scissors, surgical blades 2B, No.4
Medical Instruments Forceps, retractors, dental tools 2B, BA
Molds & Dies Plastic injection molds, die-casting molds 2B
Automotive Components Trim panels, exhaust system hardware No.4, HL
Household Appliances Knife blades for food processors, blender blades 2B, BA
Architectural & Decorative Elevator panels, door hardware, decorative trim HL, No.4, Mirror
Industrial Tooling Saw blades, industrial knives, wear plates 2B
Precision Stamping Electronic components, spring clips, and washers 2B, BA
Available Coil & Sheet Forms
Form Thickness Range Width Range Weight (Coil) Length (Sheet)
Coil 0.3 – 6.0 mm 500 – 1500 mm 50 – 500 kg —
Cut-to-length Sheet 0.3 – 6.0 mm 500 – 1500 mm — 1000 – 4000 mm
Slit Coil 0.3 – 6.0 mm 10 – 500 mm 50 – 500 kg —
Tolerances – Cold-Rolled 420 Sheet (Typical)
Thickness Range Thickness Tolerance (±) Width Tolerance (Slit Edge) Flatness (per meter)
0.30 – 0.60 mm 0.03 mm 0 / +0.5 mm ≤ 2 mm
0.61 – 1.50 mm 0.04 mm 0 / +1.0 mm ≤ 2 mm
1.51 – 3.00 mm 0.05 mm 0 / +1.5 mm ≤ 3 mm
3.01 – 6.00 mm 0.06 mm 0 / +2.0 mm ≤ 3 mm
Quality Control & Testing

Each coil or sheet is subject to the following inspections:

  • Chemical analysis – per heat

  • Hardness test (Rockwell B or C, depending on condition)

  • Tensile test (yield, tensile, elongation)

  • Surface roughness measurement (Ra, Rz as required)

  • Flatness inspection (using a straight edge or a laser)

  • Dimensional check (thickness, width, length)

  • Visual inspection (surface defects, scratches, oil spots)

  • Eddy current or PMI (upon request)

Certificates Available:

  • Mill Test Certificate (EN 10204 3.1)

  • Third-party inspection report (SGS, BV, TUV – upon request)

  • Heat treatment records (if applicable)

  • NACE compliance (on request)

Packaging & Logistics
Item Method
Sheet Packaging Paper interleaving between sheets, moisture-proof paper wrapping, steel strapping, wooden pallet
Coil Packaging VCI paper + moisture-proof paper + galvanized steel outer wrapping + wooden skid
Edge Protection Cardboard or plastic edge protectors for coils
Marking Grade, dimensions, heat number, and weight are clearly labeled
Port of Loading Major Chinese ports (Shanghai, Tianjin, Ningbo, etc.)
Shipping Terms FOB, CFR, CIF (as agreed)

 

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