Grade: 420 (ASTM A240)
Thickness: 0.1mm~20mm or according to your request
Width: 10mm~2000mm or according to your request
Length: 100mm-12000mm or according to your request
Size: 800*1000mm, 800*2500mm, 1220*1250mm, or as required
Surface Finish: BA/2B/NO.1/NO.4/4K/HL/8K/EMBOSSED or according to customer requirementg,etc.
Packing: Clients’ requirement and Standard export sea-worthy packing
| Parameter | Details |
|---|---|
| Material Grade | 420 (ASTM A240/UNS S42000) |
| Thickness Range | 0.1mm~20mm or according to your request |
| Width Range | 10mm~2000mm or according to your request |
| Surface Finish | 2B, NO.1, HL, NO.4, 4K, 8K, Sandblast, BA, Checker Plate |
| Tensile Strength | ≥ 655 MPa (min) |
| Elongation | ≥25% |
| Yield Strength | ≥ 345 MPa (min) |
| Chemical Composition | Chromium (Cr): 12.0% – 14.0%; Manganese (Mn): ≤ 1%; Silicon (Si): ≤ 1%; |
420 Stainless Steel Sheet – High Hardness Martensitic Steel by OrinoxSteel
420 stainless steel sheets are known for their excellent hardness, wear resistance, and strength after heat treatment, making them a preferred material for applications that require durable cutting edges and mechanical performance. With a chromium content of 12–14%, 420 stainless steel provides moderate corrosion resistance along with outstanding hardness compared with many other stainless grades.
Due to its martensitic microstructure, 420 stainless steel can be hardened through heat treatment, achieving high surface hardness and good edge retention. This makes it widely used for industrial blades, knives, surgical instruments, valve components, molds, and mechanical parts.
At OrinoxSteel, we supply reliable 420 stainless steel sheets with stable chemical composition and precise dimensional tolerances, helping manufacturers achieve consistent performance in demanding applications.
Types of 420 Stainless Steel Sheet
We supply two main variants of 420-grade stainless steel sheets:
• 420J1 Stainless Steel Sheet
420J1 contains lower carbon content (approximately 0.15–0.25%) and around 12–14% chromium, offering a good balance between corrosion resistance and toughness. Compared with 420J2, it provides slightly lower hardness but better ductility and machinability.
It is commonly used for:
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precision instruments
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surgical tools
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industrial components
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cutting tools requiring moderate hardness
• 420J2 Stainless Steel Sheet
420J2 contains higher carbon content (approximately 0.26–0.40%), allowing it to achieve higher hardness after heat treatment. This grade offers superior wear resistance and edge retention.
Typical applications include:
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knives and scissors
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industrial blades
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cutting tools
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molds and mechanical components
Standard Specifications – 420 Stainless Steel Sheet
We offer a wide range of dimensions and thicknesses to meet different industrial and manufacturing requirements. Sheets can be supplied in standard sizes or custom dimensions according to customer specifications.
Available Thicknesses:
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0.3 mm
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0.5 mm
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0.8 mm
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1.0 mm
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1.2 mm
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1.5 mm
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2.0 mm
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3.0 mm
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5.0 mm
Standard Sheet Sizes:
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800 x 1000 mm
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800 x 2500 mm
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1000 x 1030 mm
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1220 x 1250 mm
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1500 x 1550 mm
Custom sizes available on demand.
How to Calculate the Weight of 420 Stainless Steel Sheet
To estimate the weight of a stainless steel sheet, use the following formula:
Weight (kg) = Width (m) × Length (m) × Thickness (mm) × 7.93
Where 7.93 represents the density of stainless steel (g/cm³).
Make sure to convert units correctly before calculating.
Example:
For a 1220 × 2440 mm sheet with 1 mm thickness:
Weight = 1.22 × 2.44 × 1 × 7.93 ≈ 23.6 kg
Applications of 420 Stainless Steel Sheet in Knife and Blade Manufacturing
Due to its high hardness and excellent wear resistance after heat treatment, 420 stainless steel sheet is widely used in knife and blade manufacturing. It provides good edge retention and durability, making it suitable for products such as:
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kitchen knives
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industrial blades
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scissors
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surgical blades
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cutting tools
Grades such as 420J1 and 420J2 are particularly popular in this industry.
Applications of 420 Stainless Steel Sheet in Surgical and Medical Instruments
420 stainless steel is commonly used for medical and surgical instruments because it can achieve high hardness while maintaining moderate corrosion resistance. Typical applications include:
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surgical scissors
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forceps
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dental tools
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precision medical instruments
The material can be polished to a smooth surface that is easy to clean and sterilize.
Applications of 420 Stainless Steel Sheet in Industrial Equipment Manufacturing
In industrial manufacturing, 420 stainless steel sheet is used to produce wear-resistant mechanical parts. After heat treatment, the material provides excellent strength and hardness for demanding environments.
Typical components include:
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valve parts
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pump shafts
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mechanical components
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industrial cutting tools
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molds and dies
Applications of 420 Stainless Steel Sheet in Mold and Tooling Industry
Because of its good hardenability and wear resistance, 420 stainless steel is frequently used in plastic molds and tooling applications. Its polished surface and durability make it suitable for precision mold components used in manufacturing industries.
Applications of 420 Stainless Steel Sheet in Decorative and Structural Components
Although 420 stainless steel is mainly used for mechanical applications, it can also be used in decorative and structural components where both strength and a polished surface are required.
Typical examples include:
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decorative hardware
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industrial panels
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mechanical housings
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precision structural parts
| Comparison Items | 200 Series (201) | 300 Series (304 as a representative) | 400 Series (430 as a representative) |
|---|---|---|---|
| Chemical Composition | Chromium (Cr) 16% – 18%, manganese (Mn) 5.5% – 7.5%, nickel (Ni) 3.5% – 5.5%, nitrogen (N) ≤0.25% | Chromium (Cr) 18% – 20%, nickel (Ni) 8% – 10.5%, low carbon | Chromium (Cr) 16% – 18%, low carbon, ferrite structure |
| Tensile Strength (MPa) | ≥520 | ≥515 | ≥450 |
| Elongation (%) | ≥40 | ≥40 | ≥22 |
| Corrosion Resistance | Moderate corrosion resistance, suitable for less corrosive environments. Prone to rusting in humid or corrosive conditions compared to 300 series. | Good general corrosion resistance, suitable for general atmosphere, fresh water and other environments, relatively weak tolerance to chloride ions | Fair corrosion resistance, better than carbon steel but inferior to 300 series. Susceptible to pitting corrosion in chloride-rich environments. |
| Magnetic Properties | Weakly magnetic due to its alloy composition | Non-magnetic in the annealed state, may become slightly magnetic under certain processing conditions | Magnetic |
| Cost | Relatively low, due to lower nickel content and relatively simple composition | Moderate, as a widely used and reliable grade | Relatively low, similar to 200 series in terms of cost, but with different performance characteristics |
| Application Fields | Interior decoration, low-end kitchenware, some decorative trims in buildings where corrosion resistance requirements are not high | Kitchen utensils, building decoration, general industrial components and other daily fields | Appliance housings, automotive trim, some food processing equipment where non-magnetic properties are not required and moderate corrosion resistance suffices |
Why Choose Our 420 Stainless Steel Sheet?
Strict Quality Control: Every 420 stainless steel sheet we supply undergoes comprehensive quality inspections — from raw material selection to rolling, annealing, and final inspection. Our manufacturing process follows international standards to ensure stable chemical composition, precise dimensions, and reliable performance after heat treatment.
Tailored Specifications: We provide flexible customization options including sheet thickness, dimensions, and surface finishes such as 2B, BA, and No.4. Whether you require sheets for blade manufacturing, industrial components, or precision tools, we can supply materials that match your exact technical requirements.
High Hardness and Wear Resistance: 420 stainless steel is a martensitic stainless steel known for its excellent hardness after heat treatment. Grades such as 420J1 and 420J2 offer strong wear resistance and good edge retention, making them widely used in knives, surgical instruments, industrial blades, molds, and mechanical parts.
Professional Technical Support: Our experienced technical team can assist you with grade selection, heat treatment guidance, machining recommendations, and surface finishing options, helping you maximize the performance of your 420 stainless steel sheet in demanding applications.
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