420 Stainless Steel Coil and Sheet

420 Stainless Steel Profile

Sanmei Metal Stainless Steel inventory includes 420 J2 in coil and sheet.
420 stainless steel aligns with international standards like ASTM A276 and JIS SUS420 .

SS 420 Basic Information

Overview

420 stainless steel, known as S42000, is a martensitic, hardenable alloy that stands out for its enhanced strength and hardness compared to other stainless steels like 410 and 416. It contains at least 12% chromium for corrosion resistance and higher carbon content, which increases its wear resistance and allows it to achieve a Rockwell hardness of up to 50 HRC after heat treatment. This steel exhibits good ductility in the annealed condition, but its machinability decreases once hardened beyond 30 HRC. Despite its good corrosion resistance, especially when hardened and polished, it is not as resistant as common austenitic grades and is limited by a loss of ductility at sub-zero temperatures and a loss of strength at elevated temperatures due to over-tempering. Common applications include bushings, dental and surgical instruments, pump parts, valve components, and shafts. It is not recommended for use above tempering temperatures due to a reduction in mechanical properties, and welding is possible with the right techniques .


General Properties

420 stainless steel is a high-carbon martensitic grade that offers a balance of hardness and corrosion resistance. It is known for its high hardness, wear resistance, and moderate corrosion resistance. The steel's composition includes carbon (C: 0.15-0.40%), chromium (Cr: 12.0-14.0%), and other elements in smaller amounts such as manganese (Mn), silicon (Si), phosphorus (P), and sulfur (S) .

 

Applications

420 stainless steel is used in a variety of applications where strength and durability are essential, such as in cutlery, surgical instruments, and tools. It is also used in precision machinery, bearings, electrical equipment, instruments, transportation vehicles, household appliances, and food utensils.

Resistance of Stainless Steel 420

Corrosion Resistance:
While 420 stainless steel provides good corrosion resistance, especially when hardened and polished, it is not as resistant as common austenitic grades. Its corrosion resistance is compromised at sub-zero temperatures and at elevated temperatures due to over-tempering .

 

Heat Resistance:
The useful operating range of 420 stainless steel is limited by its loss of ductility at sub-zero temperatures and loss of strength at elevated temperatures due to over-tempering .

Type 420 Stainless Steel Processing

Machinability:

420 stainless steel is relatively easy to machine in the annealed condition, but machining becomes more difficult once hardened to above 30 HRC .

 

Welding:

Welding is not common for this alloy due to its hardening properties, but it is possible with the right techniques and post-weld heat treatment to prevent cracking .

 

Hot Working:

Hot working of 420 stainless steel can improve its toughness and wear resistance .

 

Cold Working:

Cold working can increase the steel's hardness and strength while also improving its surface quality and dimensional accuracy .

 

Annealing:

Annealing is used to soften the steel, improve machinability, and prepare it for further heat treatment processes .

 

Tempering:

Tempering is used to reduce brittleness and internal stresses after hardening .

 

Hardening:

420 stainless steel can be hardened to achieve high hardness levels through a process of heating and rapid cooling (quenching) .

Physical Properties for 420 Stainless Steel

PropertyValue
Density7.74 g/cm³
Modulus of Elasticity200 GPa (29 x 10^6 psi)
Coefficient of Thermal Expansion10.3 μm/m·°C (5.7 μin./in.·°F)
Thermal Conductivity24.9 W/m·K (14.4 Btu/ft·h·°F)
Specific Heat460 J/kg·K (0.11 Btu/lb·°F) at 0-100°C (32 to 212°F)
Electrical Resistivity0.55 μΩ·m at 20°C

Mechanical Properties for 420 Stainless Steel

Property

Yield Strength, min. (ksi)

Tensile Strength, min. (ksi)

Elongation, min. (%)

Hardness, max. (Rb)

420

345 (50)

655 (95)

25

321 HBS

420 Stainless Steel Chemical Composition

GradeCarbon (C)Manganese (Mn)Silicon (Si)Phosphorus (P)Sulfur (S)Chromium (Cr)Nickel (Ni)Molybdenum (Mo)Iron (Fe)
4200.15 - 0.40%≤1.00%≤1.00%≤0.040%≤0.030%12.0 - 14.0%≤0.75%≤0.50%Balance
BUY YOUR 420

420 Stainless Steel: Top Choice for Knives—Corrosion-Resistant and Clean

420 stainless steel is the top choice for knives due to its excellent corrosion resistance, high strength, and easy-to-clean surface, ensuring durability, hygiene, and reliability.

Good Corrosion Resistance

420 stainless steel performs exceptionally well in damp or harsh environments, resisting rust and extending the product's lifespan.

High Strength

SS420 has high strength, making it suitable for applications that require high stress and frequent use, such as tools and medical equipment.

Easy to Clean

420 stainless steel has a smooth surface that does not easily accumulate dirt, making it easy to clean and maintain, making it very suitable for food processing and medical environments.

BUY YOUR 420

SS420 J1 J2

420J1 and 420J2 are branches of 420, generated mainly to meet the varying industrial application requirements for stainless steel hardness, strength, and corrosion resistance. By adjusting the chemical composition, especially the carbon content, stainless steel materials with different characteristics can be produced to adapt to various specific usage environments.
Blog: Guide to Stainless Steel 420: J1, J2, and Beyond
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Blog: Stainless Steel 420 vs 304: Complete Guide
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Sanmei's 420 Stainless Steel Coil and Sheet Specification

For Coil

TypeWidth  (mm)Weight  (MT)Thickness  (mm)
420 Coil1000, 1219, 1240, 1500 or Customized3-100.15-3.0

For Sheets

TypeWidth (mm)Length (mm)Thickness (mm)
420 Sheets1000, 1219, 1240, 1500 or Customized2000, 2438, 2500, 3000, 30480.3-3.0 

Basic Surfaces for Stainless Steel Coils and Sheets

The basic finish options for 201, 304, 304L, 316, 316L, and 430, etc. stainless steel coils and sheets include 2B, BA, No. 1, and No. 4 finishes. Please get in touch with our professional sales team for details on other grades and finishes.

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Plenty of Decorative Finishes for Your Stainless Steel Sheet

including NO.1, 2B, BA, NO.4, 8K, Hairline, Stamped, PVD color coating, Antique, Anti-Finger Print, Laminatd, Emboss ect.
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Stainless Steel Coil Surface Treatment

The finished stainless steel coil is a powerful solution to the problems of inconsistent styles and discontinuous colors.
including NO.1, 2B, BA, NO.4, 8K, Hairline, brushed and ect.
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Stainless Steel is Everywhere

Stianless Steel is an indispensable material across a wide spectrum of industries, from food processing and medical equipment to household goods, construction, and industrial applications.

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  • She is a Trustworthy Friend and Business Partner

    "Mrs.Paige is a long time business partner, supplying me many diversified products, she has the capacity to supply any product namely finished product, raw materials, machinery, spare parts & also packing materials. She always maintains quality, price and punctuality in full filling orders. She is a good friend with whom you could confidently move forward for the betterment of any business. I wish her good luck" 

    Mr. Moeez
    Director
    Start Your Worry-Free Journey
  • I've found her to be one of the most open and passionate people.

    I've worked with Mrs Paige on numerous deals for our respective companies. At the time, I found her to be one of the most open and passionate people. Her dealing is flawless, with great coordination and problem-solving skills. You can always rely on her to come through for you and give you the best support. I can confidently say I gained a good friend and look forward to continued cooperation in the future.

    Mr. Iqbal
    Director
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