🟪 Product Overview

Martensitic Stainless Steel Plate is a high‑strength, high‑hardness stainless steel designed for applications requiring:

• Wear resistance
• High mechanical strength
• Moderate corrosion resistance
• Heat treatability (quenching & tempering)

These steels can be hardened to high levels (up to 58–60 HRC for 440C), making them ideal for cutting tools, mechanical components, and industrial equipment.

🟪 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 (grade‑dependent)
• Surface Finish: No.1 / 2B / Annealed Finish

🟪 Key Features

• High hardness and wear resistance
• Excellent mechanical strength
• Heat treatable for enhanced performance
• Good corrosion resistance (grade‑dependent)
• Suitable for cutting, tooling, and mechanical applications

🟪 Included Grades

Standard Martensitic Grades

• 410 — General‑purpose martensitic stainless steel
• 416 — Free‑machining martensitic grade
• 420 — High‑hardness grade for cutting tools

High‑Carbon Martensitic Grades

• 440A — High hardness, good corrosion resistance
• 440B — Higher carbon, improved hardness
• 440C — Highest hardness (up to 60 HRC), premium wear resistance

🟪 Mechanical Properties (Typical)

Grade	Yield Strength	Tensile Strength	Hardness (HRC)	Notes
410	≥275 MPa	450–650 MPa	35–45	General martensitic
416	≥275 MPa	515–690 MPa	35–45	Free‑machining
420	≥345 MPa	650–850 MPa	48–52	Cutting tools
440A	≥450 MPa	700–900 MPa	52–56	High hardness
440B	≥500 MPa	750–950 MPa	55–58	Higher carbon
440C	≥560 MPa	760–1000 MPa	58–60	Premium wear resistance

🟪 Chemical Composition (Typical)

Grade	C (%)	Cr (%)	Ni (%)	Mo (%)	Notes
410	0.08–0.15	11.5–13.5	—	—	General martensitic
416	0.12–0.16	12–14	—	—	Free‑machining (S added)
420	0.16–0.40	12–14	—	—	High‑hardness
440A	0.60–0.75	16–18	—	—	High carbon
440B	0.75–0.95	16–18	—	—	Higher hardness
440C	0.95–1.20	16–18	—	—	Maximum hardness

🟪 Physical Properties (General)

• Density: 7.70–7.75 g/cm³
• Magnetism: Magnetic
• Heat Treatable: Yes (quenching & tempering)
• Wear Resistance: High to very high

🟪 Applications

• Cutting tools and blades
• Surgical instruments
• Pump shafts and valve components
• Bearings and bushings
• Industrial machinery parts
• Wear‑resistant mechanical components

🟪 Why Use It

Martensitic stainless steel plate provides high hardness, strength, and wear resistance, making it ideal for demanding mechanical and tooling applications.

🟪 Why Choose WelSteels

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