440C stainless steel
440C stainless steel forgings are indispensable in industries demanding extreme hardness and wear resistance. Their ability to retain sharp edges and withstand mechanical stress makes them ideal for cutting tools, bearings, and medical devices. Compliance with ASTM, AMS, and ISO standards ensures reliability in critical applications.
Descriptions
1. Chemical Composition
The high carbon and chromium content in 440C provides its signature hardness and corrosion resistance. Below is the detailed chemical composition:
| Element | Composition (%) |
| Carbon (C) | 0.95-1.20 |
| Chromium (Cr) | 16.00-18.00 |
| Manganese (Mn) | ≤1.00 |
| Silicon (Si) | ≤1.00 |
| Phosphorus (P) | ≤0.040 |
| Sulfur (S) | ≤0.030 |
| Molybdenum (Mo) | 0.75 max |
| Iron (Fe) | Balance |
2. Mechanical Properties
440C stainless steel forgings exhibit outstanding mechanical properties after heat treatment. Below are values for annealed and heat-treated conditions:
Annealed Condition
| Property | Value |
| Tensile Strength | 725 MPa (105,000 psi) |
| Yield Strength(0.2% offset) | 450 MPa (65,000 psi) |
| Elongation (50 mm gauge) | 14% |
| Hardness (Brinell) | 255 HB |
| Modulus ofElasticity | 200 GPa (29 x10⁶ psi) |
| Density | 7.70 g/cm³(0.278 1b/in³) |
| Melting Range | 1480-1530°C(2696-2786°F) |
Heat-Treated Condition (Quenched & Tempered)
| Property | Value |
| Tensile Strength | 1850-1965 MPa (270,000-285,000 psi) |
| Yield Strength(0.2% offset) | 1650-1750 MPa (240,000-254,000 psi) |
| Elongation(50 mm gauge) | 2-5% |
| Hardness (Rockwell C) | 58-60 HRC |
3. Common Forging Product
Forged Blades
Forged Bearings
Forged Surgical Tools
Forged Valve Components
Forged Mold Inserts
4. Key Advantages
Ultra-High Hardness: Achieves Rockwell C hardness up to 60 HRC.
Wear Resistance: Ideal for abrasive and high-contact applications.
Corrosion Resistance: Superior to most martensitic grades due to high chromium content.
5. Industry standards
Standard | Scope |
ASTM A276/A276M | Stainless steel bars and shapes. |
AMS 5630 | Aerospace-grade 440C bars and forgings. |
ASTM A314 | Stainless steel billets and forgings for valves. |
ISO 683-17 | Heat-treated steels for cutting tools. |
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CONTACT US
Address
B-2007,Chuanmei Building,Taishan Street,Taian City，Shandong, China
Call Us
+86 0538 6368027
Email Address
Sales@tiptopforging.com
Applications
High-stress fasteners, landing gear components.
Ball bearings, roller bearings, and aerospace bearings.
Valve components, pump parts, and mold inserts.
