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Quality 420 Martensitic Stainless Steel Sheet Hot rolled / cold rolled 0.4mm - 100mm Thickness factory
Quality 420 Martensitic Stainless Steel Sheet Hot rolled / cold rolled 0.4mm - 100mm Thickness factory

420 Martensitic Stainless Steel Sheet Hot rolled / cold rolled 0.4mm - 100mm Thickness

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 Martensitic Stainless Steel Sheet

Martensitic Stainless Steel Sheet 0.4mm

Martensitic Stainless Steel Sheet 100mm
Product Summary
420 stainless plate Martensitic Grade for High Hardness Applications

Product Details

Highlight:

420 Martensitic Stainless Steel Sheet

,

Martensitic Stainless Steel Sheet 0.4mm

,

Martensitic Stainless Steel Sheet 100mm
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 stainless steel plate is a martensitic stainless steel with higher carbon content than grade 410, designed for applications requiring excellent hardness, wear resistance, and moderate corrosion resistance. It can be heat-treated to achieve a hardness of up to 50 HRC, making it the hardest among the 12% chromium grades.

Grade 420 stainless steel is widely used in cutlery, surgical instruments, pump shafts, valve components, bearings, and plastic molding tools. Its combination of high strength, good polishability, and cost-effectiveness makes it a popular choice across multiple industries.

Key Features

 
 
Feature Description
Type Martensitic stainless steel
Hardness (heat-treated) Up to 50 HRC
Yield Strength ≥379 MPa (55 KSI) as annealed
Tensile Strength ≥689 MPa (100 KSI) as annealed
Corrosion Resistance Moderate, best achieved in hardened condition
Magnetic Yes (due to martensitic structure)
Weldability Not recommended due to hardening properties
Machinability Good in annealed condition (50% rating)

Equivalent Designations

 
 
Standard Grade
AISI 420
UNS S42000
EN / DIN 1.4021 / X20Cr13
JIS SUS420J1 / SUS420J2
GB 20Cr13 / 30Cr13

Note: Different standards specify varying carbon ranges for 420-type grades:

  • AISI 420 / UNS S42000: 0.15% carbon minimum

  • EN 1.4021 (X20Cr13): 0.16-0.25% carbon

  • SUS420J1: 0.16-0.25% carbon

  • SUS420J2: 0.26-0.40% carbon (higher hardness)

Specifications & Size Range

 
 
Parameter Range
Thickness 0.4 mm – 100 mm (custom up to 300 mm available)
Width 3 mm – 3500 mm
Length 1000 mm – 12000 mm (custom available)
Production Method Hot rolled or cold rolled
Standard ASTM A240/A480, EN 10088-2, JIS G4304/G4305

Surface Finishes

 
 
Finish Code Characteristics Application
No.1 Hot rolled, annealed & pickled Original industrial surface Industrial equipment, thick plates
2B Cold rolled, bright finish Smooth, reflective General fabrication, kitchen equipment
BA Bright annealed Mirror-like reflectivity Decorative applications
No.4 Brushed Matte, fine satin finish Architectural, food processing
HL Hairline Continuous linear streaks Building facades
8K Mirror Highly reflective Luxury finishes

Chemical Composition

Standard 420 (AISI / UNS S42000)

 
 
Element Content (%)
Carbon (C) 0.15 – 0.46
Chromium (Cr) 12.0 – 14.0
Manganese (Mn) ≤1.50
Silicon (Si) ≤1.00
Phosphorus (P) ≤0.040
Sulfur (S) ≤0.030
Iron (Fe) Balance

SUS420J1 (JIS Standard)

 
 
Element Content (%)
Carbon (C) 0.16 – 0.25
Chromium (Cr) 12.0 – 14.0
Manganese (Mn) ≤1.00
Silicon (Si) ≤1.00
Phosphorus (P) ≤0.040
Sulfur (S) ≤0.030
Nickel (Ni) ≤0.60

SUS420J2 (Higher Carbon Version)

 
 
Element Content (%)
Carbon (C) 0.26 – 0.40
Chromium (Cr) 12.0 – 14.0
Manganese (Mn) ≤1.00
Silicon (Si) ≤1.00

Mechanical Properties (Annealed Condition)

 
 
Property Value
Tensile Strength ≥689 MPa (100 KSI)
Yield Strength (0.2% offset) ≥379 MPa (55 KSI)
Elongation 15% (in 2 inches)
Hardness (Brinell) ≤223 HBW
Hardness (Rockwell) ≤97 HRB
Shear Strength 420 MPa (61 KSI)
Density 7.70 – 8.00 g/cm³
Modulus of Elasticity 200 – 215 GPa
Melting Point 1450 – 1510°C (2640 – 2750°F)
Machinability 50% of 1212 carbon steel
Electrical Conductivity 3% IACS

Physical Properties

 
 
Property Value
Coefficient of Thermal Expansion (20-200°C) 10.5 × 10⁻⁶ /°C
Thermal Conductivity (20°C) 30.0 W/m·K
Specific Heat 460 J/kg·K
Modulus of Elasticity (20°C) 215 GPa

Fabrication Guidelines

Machining

420 stainless steel offers good machinability in the annealed condition (50% rating). Use rigid tooling and sharp cutting edges. Hardened material is significantly more difficult to machine.

Welding

Not recommended due to hardening properties. If welding is absolutely necessary, special procedures and preheating are required, followed by immediate heat treatment.

Hot Working

Can be forged or hot worked at temperatures between 950°C and 1120°C, followed by slow cooling.

Polishing

Excellent polishability makes 420 suitable for decorative and high-finish applications.

Forming

Good ductility in the annealed condition allows for moderate forming operations.

Contact Us

Get a fast, accurate quote for 420 Stainless Steel Plates tailored to your project requirements.

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