304 vs 420 Stainless Steel: Which Is Better & Why?
                     304 vs 420 Stainless 
Steel: Which is Better?
Choosing the right stainless steel grade is crucial for industrial, 
commercial, and household applications. This presentation 
compares 304 and 420 stainless steel based on their properties 
and ideal use cases.
Understanding Stainless Steel Grades
Stainless steel is an iron-based alloy known for its corrosion resistance, strength, and durability. Different grades 
vary based on chemical composition and treatment.
304 Stainless Steel 420 Stainless Steel
An austenitic stainless steel, widely used in kitchen A martensitic stainless steel, known for high hardness 
equipment, architecture, and industrial components. and wear resistance, often used in cutlery and surgical 
instruments.
Chemical Composition
Chromium 18-20% 12-14%
Nickel 8-10.5% ~0.5% (or none)
Carbon ≤ 0.08% 0.15 – 0.40%
304 has higher chromium and nickel for better corrosion resistance, while 420 has higher carbon for increased hardness.
Corrosion Resistance
304 Stainless Steel 420 Stainless Steel
Excellent corrosion resistance due to high Moderate corrosion resistance. Resists moisture 
chromium and nickel content, forming a protective and mild acids but may corrode in saltwater or 
oxide layer. Ideal for harsh environments. acidic conditions.
Winner: 304 stainless steel for superior corrosion resistance.
Hardness and Strength
420 Stainless Steel 304 Stainless Steel
Higher carbon content allows heat treatment to Not hardenable by heat treatment; relatively softer. 
50+ HRC. Offers superior wear resistance and edge Unsuitable for applications requiring high hardness.
retention, ideal for blades.
Winner: 420 stainless steel for higher hardness and wear resistance.
Weldability and Formability
304 Stainless Steel 420 Stainless Steel
Excellent weldability and formability. Ideal for More brittle due to high carbon content, affecting 
fabrication, construction, and architectural uses weldability and limiting forming capabilities.
without losing integrity.
Winner: 304 stainless steel for ease of fabrication.
Common Applications
Kitchen utensils, sinks 304 stainless steel
Cutlery, surgical blades 420 stainless steel
Construction and architecture 304 stainless steel
Industrial valves, gears 420 stainless steel
Chemical containers 304 stainless steel
Scissors, razor blades 420 stainless steel
304 is for general-purpose and corrosion-resistant uses, while 420 excels in hardness-specific applications.
Ferrite Structural Steel: Your Trusted Supplier
Choosing between 304 and 420 stainless steel depends on your specific application needs. 
Ferrite Structural Steel Pvt Ltd offers a wide range of certified stainless steel grades, competitive pricing, and expert 
consultation.
• Wide range of stainless steel grades (304 and 420)
• Competitive pricing and bulk availability
• Certified materials with mill test reports
• Timely delivery and expert consultation