What is the hardness of 440C?
What is the hardness of 440C?
58–60 HRC
Unsourced material may be challenged and removed. 440C (UNS designation S44004) is a martensitic 400 series stainless steel, and is the highest carbon content from 400 stainless steel series. It is usually heat treated to reach hardness of 58–60 HRC.
What type of material is 440C?
stainless steel
Grade 440C stainless steel is a high carbon martensitic stainless steel. It has high strength, moderate corrosion resistance, and good hardness and wear resistance.
How hard can you heat treat 440C stainless steel?
To harden stainless steel 440C heat to 1010-1070°C, fully soak and quench in warm oil or air cool. Be careful not to overheat or full hardness will not be obtained. When tempering 440C a Rockwell hardness of 60HRc can be obtained. Temper for at least one hour.
IS 440C magnetic?
440C contains a much higher chromium content, and is also used in bearings when more abrasion and wear may be expected. Note: 440C Stainless Steel Balls are not magnets. They are however attracted to magnets.
Does 440C grow in heat treat?
So a piece of 440C steel that is raised to the austenitizing temperature and then cooled, will expand (a little) as it is heated and then shrink back to original size once it is cooled.
IS 440C steel tough?
Corrosion resistant- 440C steel is highly resistant to corrosion with only a minimum of care needed to protect the blade from rust. Toughness – 440C steel is proven to be very tough. It has high wear resistance which is important if the knife is used in an outdoor environment.
How strong is 440C stainless steel?
Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 760-1970 MPa | 110000-286000 psi |
| Yield strength (@ strain 0.200%) | 450-1900 MPa | 65300-276000 psi |
| Bulk modulus | 166 GPa | 24100 ksi |
| Shear modulus | 83.9 GPa | 12200 ksi |
What are the properties of 440C stainless steel?
1 The properties of 440c stainless steel. It has the highest hardness, highest strength and greatest wear resistance of all of them after it has undergone hardening via heat treatment. 2 Heat treatment of 440c stainless steel. 3 Applications of 440c stainless steel.
What is hardened AISI 440C stainless steel?
Hardened AISI 440C is AISI 440C stainless steel in the hardened (H) condition. The graph bars on the material properties cards below compare hardened AISI 440C to: wrought martensitic stainless steels (top), all iron alloys (middle), and the entire database (bottom).
How can I increase the hardness of 440C parts?
440C can be hardened for maximum hardness by oil quenching or air cooling from 1850 to 1900°F. Large sections or complex parts should be preheated to 1425°F, equalize, and then raised to the austenitizing temperature. If the finished part is not to be ground and polished, the surface may be improved by packing in a neutral material during heating.
Why is 440 steel hard to weld?
440 steel, especially 440C, is difficult to process due to its high annealing hardness and abrasive chromium carbide. 440 steel welding is not recommended because of high carbon content, extremely easy to crack and metal fillers are not easily available.
