🟪 Product Overview

420 Stainless Steel Plate is a high‑carbon martensitic stainless steel designed for applications requiring:

• High hardness after heat treatment
• Excellent wear resistance
• Good corrosion resistance in mild environments
• High polishability for mirror‑finish applications

420 is widely used in cutlery, surgical tools, industrial blades, pump shafts, and precision mechanical parts.

Compared with 410, 420 offers higher hardness and better edge retention, making it a preferred material for cutting and wear‑resistant applications.

🟪 Product Specifications

• Thickness: 2 – 80 mm
• Width: 1000 – 2000 mm
• Length: Custom lengths available
• Standards:
  • ASTM A240 / A480
  • JIS G4304 (420J2)
  • EN 10088‑2
• Heat Treatment:
  • Annealed
  • Quenched & Tempered
  • Hardened (48–52 HRC)
• Surface Finish: No.1 / 2B / Annealed Finish

🟪 Key Features

• High hardness after heat treatment
• Excellent wear resistance
• Good polishability (mirror finish possible)
• Moderate corrosion resistance
• Suitable for cutting, tooling, and mechanical applications

🟪 Included Grades

• 420 — Standard high‑carbon martensitic stainless steel
• 420J2 — Higher corrosion resistance, widely used in cutlery and surgical tools

🟪 Mechanical Properties (Typical)

Property	420 Stainless Steel
Yield Strength	≥345 MPa
Tensile Strength	650–850 MPa
Hardness (HRC)	48–52 (quenched & tempered)
Elongation	≥18%
Condition	Annealed / Q&T

🟪 Chemical Composition (Typical)

Element	Content (%)
C	0.16–0.40
Cr	12–14
Ni	—
Mn	≤1.0
Si	≤1.0
P	≤0.040
S	≤0.030

🟪 Physical Properties (General)

• Density: 7.75 g/cm³
• Magnetism: Magnetic
• Heat Treatable: Yes
• Wear Resistance: High

🟪 Applications

• Cutting tools and industrial blades
• Surgical instruments
• Scissors and knives
• Pump shafts and valve components
• Mechanical parts requiring high hardness
• Precision tools and wear‑resistant components

🟪 Why Use It

420 stainless steel plate is ideal for applications requiring high hardness, excellent wear resistance, and good polishability. Its ability to reach 48–52 HRC makes it a preferred material for cutting tools, surgical instruments, and high‑wear mechanical components.

🟪 Why Choose Jaron Steel

• Full range of 420 / 420J2 stainless steel plates
• Heat‑treatment options available
• Precision cutting and machining services
• SGS / BV / TUV inspection available
• Export‑grade seaworthy packaging