🟪 Product Overview

440C Stainless Steel Plate is the highest‑carbon, highest‑hardness grade in the martensitic stainless steel family. It is engineered for applications requiring:

• Maximum hardness (up to 60 HRC)
• Exceptional wear resistance
• High edge retention
• Good corrosion resistance for a high‑carbon steel
• Excellent dimensional stability after heat treatment

Because of its superior performance, 440C is widely used in premium cutting tools, precision bearings, industrial blades, molds, and high‑load mechanical components.

🟪 Product Specifications

• Thickness: 2 – 80 mm
• Width: 1000 – 2000 mm
• Length: Custom lengths available
• Standards:
  • ASTM A240 / A480
  • JIS G4304
  • EN 10088‑2
• Heat Treatment:
  • Annealed
  • Quenched & Tempered
  • Hardened (58–60 HRC)
• Surface Finish: No.1 / 2B / Annealed Finish

🟪 Key Features

• Highest hardness among martensitic stainless steels
• Excellent wear resistance and edge retention
• Good corrosion resistance for high‑carbon stainless steel
• Heat treatable to 58–60 HRC
• Suitable for high‑precision and high‑load applications

🟪 Included Grades

• 440C — Highest carbon, maximum hardness
• 440B — Medium carbon, slightly lower hardness
• 440A — Lower carbon, better corrosion resistance

🟪 Mechanical Properties (Typical)

Property	440C Stainless Steel
Yield Strength	≥560 MPa
Tensile Strength	760–1000 MPa
Hardness (HRC)	58–60 (quenched & tempered)
Elongation	≥12%
Condition	Annealed / Q&T

🟪 Chemical Composition (Typical)

Element	Content (%)
C	0.95–1.20
Cr	16–18
Ni	—
Mo	≤0.75
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: Very high
• Edge Retention: Excellent

🟪 Applications

• High‑end knives and cutting tools
• Precision bearings
• Industrial blades and cutters
• Molds and dies
• Valve components
• Mechanical parts requiring maximum hardness
• Surgical tools and instruments

🟪 Why Use It

440C stainless steel plate delivers maximum hardness, superior wear resistance, and excellent edge retention, making it the top choice for high‑performance cutting tools, precision bearings, and heavy‑duty mechanical components.

🟪 Why Choose Jaron Steel

• Full range of 440C stainless steel plates
• Heat‑treatment options available
• Precision cutting, machining, and surface finishing
• SGS / BV / TUV inspection available
• Export‑grade seaworthy packaging