Learn about our high-carbon Stainless Steel Alloy, 440C. Used Primarily in Molds, Dies, Bearings and more.
440C Overview
440C stainless steel is a member of the 400 series of stainless steels. It has the highest carbon content of all the
stainless steel alloys and is hardened by heat treatment. 440C offers high strength, hardness, and excellent wear
resistance. It’s often used in high-wear applications like cutlery, bearings and races, bushings, valve components,
surgical instruments, and molds and dies. This stainless steel is not recommended for use at high temperatures
(typically higher than 400°C) to avoid reduction of its corrosion and impact resistance.
440C Nominal Composition
| Kr | Kr | Mn | Si | Mo | P | S | Fe | |
|---|---|---|---|---|---|---|---|---|
| Mindest | 16.0 | 0.95 | - | - | -0.40 | - | - | - |
| max | 18.0 | 1.2 | 1.0 | 1.0 | 0.65 | 0,04 | 0,03 | Balance |
Industriestandards
Commercial use of the alloy is governed by industry standards such as: AMS 5618 (VAR), AMS 5630, AMS 5880, ASTM A276, AMS QQ-S-763, ASTM A493, ASTM A580, DIN 1.4125, BS EN 10088.
Anwendungen
Because of 440C’s high strength, hardness and wear resistance, this stainless steel is often used in high-wear applications like:
- Gage Blocks and Measuring Instruments
- Cutlery (Knives, Forks, Spoons)
- Ball Bearings and Races
- Molds and Dies
- Surgical Instruments
Physical and Thermal Properties
| At 70°F | At 20°C | |
|---|---|---|
| Density | 0.275 lb/in³ | 7.80 g/cm³ |
| Melting Point | 2500–2700°F | 1483°C |
| Thermal Expansion Co-efficient | 5.60 µin/in·°F | 10.2 µm/m·°C |
| Thermal Conductivity | 168 BTU·in/hr·ft²·°F | 24.2 W/m·K |
Mechanische Eigenschaften
| Representative Tensile Properties (Hardened 1900°F, oil quench, and tempered 600°F) | |
|---|---|
| Temperature | 70°F |
| Ultimate Tensile Strength | 285 ksi |
| 0.2% Yield Strength | 275 ksi |
| Verlängerung | 2% |
| Reduction of Area | 10% |
| Hardness | 580 Brinell |
Available Specificatins
| Wire & Bar | AMS 5618 (VAR), AMS 5630, AMS 5880, ASTM A276, AMS QQ-S-763, ASTM A493, ASTM A580, DIN 1.4125, BS EN 10088. |
Typical Hardness
| Typical Hardness (1” round, hardened 1900°F, oil quench, and tempered one hour) | ||||||
|---|---|---|---|---|---|---|
| Tempering Temperature (°F) | 300 | 400 | 500 | 600 | 700 | 800 |
| Rockwell Hardness (HRC) | 60 | 59 | 57 | 56 | 56 | 56 |
Verpackungsoptionen
- Spule
- Spulen
- Riegel
- Kundenspezifische Verpackung verfügbar