420 Stainless Steel

Martensitic Alloy 420

Overview: 420 Stainless Steel

420, a hardenable martensitic alloy, is essentially a “higher carbon” version of 410, designed to enhance hardness and strength while retaining similar chromium levels. Despite having a lower chromium content (12% minimum) compared to the austenitic 304 grade (18% minimum), 420 still offers notable anti-corrosion properties, classifying it firmly within the stainless steel category rather than carbon steel. However, its use is somewhat restricted due to reduced ductility at low temperatures and diminished strength when over-tempered at high temperatures, leading to its infrequent welding applications.

What Is 420 Stainless Steel

420 Stainless Steel Features

420 alloy is recognized for its exceptional strength, hardness, and wear resistance, attributes attributed to its high carbon content. However, this comes at the expense of plasticity and weldability. With somewhat limited corrosion resistance, 420 is often chosen for components needing robust mechanical properties without the stringent demands for corrosion resistance.

Thanks to its optimal chemical composition, 420 steel is frequently selected for scenarios requiring both corrosion resistance and hardness. This makes it a preferred material for a diverse range of uses, including pump shafts, precision molds for plastics, mechanical components like cams and pivots, as well as for manufacturing firearms and various types of fasteners.

Additionally, 420 alloy is also chosen for critical medical and dental tools, encompassing surgical scissors, knife blades, and other cutlery, along with specialized instruments such as needle valves, lens molds, and precision gauges. Its durability and resistance qualities make it ideal for shear blades, hand tools, and valve components, underscoring its versatility across multiple industries.

420 Stainless Steel Application

420 Alloy Tags

UNS S42000, 1.4021, AISI 420, SUS 420J1, Inox 420, Acero 420, GB 20Cr13, Type 420, Grade 420.

420 Stainless Steel Technical Sheet


420 Chemical Compositions Sheet

Grade Standard C Si Mn P S Cr Ni

420 Stainless Steel Properties Sheet

Grade AISI/ASTM Yield Strength Rp0.2(N/mm²) Tensile Strength Rm(N/mm²) Hardness Elongation(%)
241 Max

Why Purchase 420 Alloy from GHT

Reliable Stainless Steel Coil Inventory Assurance

Ever been in a bind due to an urgent need for substantial quantities of stainless steel coils, only to find your supplier’s inventory lacking? Such situations can disrupt your workflow and plans.

Our Advantage: With us, that scenario is a thing of the past.  Our inventory is consistently stocked to the brim, ensuring rapid fulfillment of even the largest orders, seamlessly aligning with your business timeline.

Tailored Stainless Steel Material Processing

You might have encountered situations where custom processing is needed, but finding the right supplier to meet your specific demands can be a challenge.

Our Advantage: Our robust processing capabilities are designed to cater to all your customization needs. Be it dimension adjustments, stainless steel finish surface treatments, or other specific requirements, we offer professional one-stop services.

Competitive Stainless Steel Pricing

When searching for stainless steel coil suppliers, pricing is often a key consideration. You might have had to compromise on your ideal supplier due to high costs.

Our Advantage: Through effective cost control and optimized procurement processes, we ensure competitive pricing. This means choosing us not only gets you high-quality products but also services that offer great value for money.

Varied Inventory Stainless Steel Coil Specifications

The quest for stainless steel coils with precise specifications can often lead to dead ends. Finding a supplier who understands and meets these unique requirements is crucial.

Our Advantage: Our inventory is a testament to diversity, encompassing a variety of materials, thicknesses, and widths. We pride ourselves on being able to meet your specific project needs with pinpoint accuracy.

Precision Stainless Steel Shearing Services

Accurate shearing is crucial for the use of stainless steel coils, but not all suppliers can offer such precision services.

Our Advantage: Our shearing services are both professional and efficient, ensuring precise cuts as per your requirements, guaranteeing that the products meet your exact specifications.

Looking For 420 Supplier

Send us a message to discuss your 420 needs. We always reply within 24 hours.

How To Pack 420 Stainless Steel Sheet & Coil

In GHT, all of our stainless steel coils are packaged as per international standard to prevent any possible damage or loss. By default, for quantity less than 1 whole compete coil (our MOQ is 5 tons), we will use woven plastic bag to cover SS coils and then fix them upon wooden pallet for further protection. We can also package the SS coils as per your special requirement, though this can incur extra cost.

In GHT, all of our 420 stainless steel sheets are packaged as per international standard to prevent any possible damage or loss. By default, we will use brown paper to cover SS sheets and then bundle them together onto wooden pallets. At times, upon some customers’ requests, we will also apply reinforced package with extra metal straps fixed on the four corners, though this can incur extra cost. For enhanced customer experience, we also accept customized package as per your requests.

420 Stainless Steel FAQs

Yes, as a martensitic stainless steel, whether annealed or hardened, stainless steel 420 keeps magnetic.

Absolutely, 420 stainless steel is a commendable choice for knives, catering especially to chefs, hunters, and divers. 420 hardness ensures a good balance of toughness and high resistance, making it adept for various uses. One of 420’s standout features is its corrosion resistance, ideal for humid or marine environments.

However, it’s worth noting that while 420 steel maintains its sharpness less effectively than higher-end steels, it compensates with ease of sharpening. This attribute, coupled with its affordability, makes 420 stainless steel an excellent option for budget-friendly, low-end knives.

Composition: 420 stainless steel boasts a carbon content ranging from 0.15% to 0.40%, significantly higher than 304’s maximum of 0.08%.
Conversely, 304 stainless steel contains more chromium, between 18% and 20%, compared to 420’s 12% to 14%, enhancing its corrosion resistance.

420 stainless steel is prized for its hardness and strength, making it ideal for applications requiring wear resistance, albeit with lesser corrosion resistance than 304.
304 stainless steel excels in corrosion resistance, making it a better choice for acidic or highly corrosive environments, though it lacks the hardness of 420.

420 is often chosen for manufacturing cutting tools, surgical instruments, and molds, benefiting from its superior hardness and wear resistance.
304’s exceptional corrosion resistance makes it a go-to material for food processing equipment, chemical containers, and architectural features, suitable for a broader range of temperatures.

No. We have only good quality SS 420 stainless steel sheet & coil .

We can provide 420 samples for you to check the quality. Sample is free and you just pay the freight.

Yes, we offer 420 cut to size customization services for our 420 grade products based on your specific requirements, from thickness, width to grade. Just let us know your application.

Trial orders can be delivered within a week. For regular orders, it takes 7-30 days roughly.

Just Send Us What You Want To Know​

Want To Purchase 420 Stainless Steel?


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