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- ATI Allegheny Ludlum 420 Martensitic Stainless Steel
ATI Allegheny Ludlum 420 Martensitic Stainless Steel
| Category | Metal , Ferrous Metal , Martensitic , Stainless Steel , T 400 Series Stainless Steel |
| Manufacturer | ATI Allegheny Ludlum |
| Trade Name | |
| Port | Ningbo port,China |
| Trade Terms | FOB, CFR, CIF |
| Payment Terms | L/C, T/T, Western Union |
| Download PDF | ATI Allegheny Ludlum 420 Martensitic Stainless Steel.pdf  |
| Price | EMAIL US sales@lookpolymers.com |
Material Notes:
Characteristics: superior wear resistance, hardenable, excellent corrosion resistance. Applications:cutlery, dental and surgical instruments, nozzles, valve parts, hardened steel ball and seats for oil well pumps, separating screens and strainers, springs, shears, and wear surfaces. Information provided by Allegheny Ludlum
| Physical Properties | Metric | English | Comments |
|---|---|---|---|
| Specific Gravity | 7.73 g/cc | 7.73 g/cc | |
| Density | 7.68 g/cc | 0.277 lb/in³ |
| Mechanical Properties | Metric | English | Comments |
|---|---|---|---|
| Hardness, Rockwell B | 85 | 85 | |
| 87 | 87 | ||
| Hardness, Rockwell C | 23 | 23 | Hardened+Tempered 1200°F |
| 36 | 36 | Hardened+Tempered 1000°F | |
| 44 | 44 | Hardened+Tempered 550°F | |
| 45 | 45 | Hardened+Tempered 600°F | |
| 46 | 46 | Hardened+Tempered 800°F | |
| 46 | 46 | Hardened+Tempered 900°F | |
| 48 | 48 | Hardened+Tempered 400°F | |
| Tensile Strength, Ultimate | 586 MPa | 85000 psi | Annealed |
| 838 MPa | 122000 psi | Hardened 1900°F, Tempered 1200°F | |
| 1093 MPa | 158500 psi | Hardened 1900°F, Tempered 1000°F | |
| 1583 MPa | 229600 psi | Hardened 1900°F, Tempered 550°F | |
| 1606 MPa | 232900 psi | Hardened 1900°F, Tempered 600°F | |
| 1606 MPa | 232900 psi | Hardened 1900°F, Tempered 900°F | |
| 1627 MPa | 236000 psi | Hardened 1900°F, Tempered 800°F | |
| 1759 MPa | 255100 psi | Hardened 1900°F, Tempered 400°F | |
| Tensile Strength, Yield | 652 MPa | 94600 psi | Hardened 1900°F, Tempered 1200°F |
| 951 MPa | 138000 psi | Hardened 1900°F, Tempered 1000°F | |
| 1213 MPa | 175900 psi | Hardened 1900°F, Tempered 550°F | |
| 1234 MPa | 179000 psi | Hardened 1900°F, Tempered 600°F | |
| 1236 MPa | 179300 psi | Hardened 1900°F, Tempered 900°F | |
| 1280 MPa | 186000 psi | Hardened 1900°F, Tempered 800°F | |
| 1311 MPa | 190100 psi | Hardened 1900°F, Tempered 400°F | |
| 310 MPa @Strain 0.200 % |
45000 psi @Strain 0.200 % |
Annealed | |
| Elongation at Break | 29 % | 29 % | Annealed |
| Thermal Properties | Metric | English | Comments |
|---|---|---|---|
| CTE, linear | 11.2 µm/m-°C @Temperature 20.0 - 200 °C |
6.22 µin/in-°F @Temperature 68.0 - 392 °F |
|
| 12.5 µm/m-°C @Temperature 20.0 - 600 °C |
6.94 µin/in-°F @Temperature 68.0 - 1110 °F |
||
| Specific Heat Capacity | 0.460 J/g-°C | 0.110 BTU/lb-°F | |
| Thermal Conductivity | 24.2 W/m-K @Temperature 100 °C |
168 BTU-in/hr-ft²-°F @Temperature 212 °F |
|
| Melting Point | 1454 - 1510 °C | 2649 - 2750 °F | |
| Solidus | 1454 °C | 2649 °F | |
| Liquidus | 1510 °C | 2750 °F |
| Component Elements Properties | Metric | English | Comments |
|---|---|---|---|
| Carbon, C | 0.15 - 0.40 % | 0.15 - 0.40 % | |
| Chromium, Cr | 12 - 14 % | 12 - 14 % | |
| Iron, Fe | 83 - 87.9 % | 83 - 87.9 % | as balance |
| Manganese, Mn | <= 1.0 % | <= 1.0 % | |
| Nickel, Ni | <= 0.50 % | <= 0.50 % | |
| Phosphorous, P | <= 0.040 % | <= 0.040 % | |
| Silicon, Si | <= 1.0 % | <= 1.0 % | |
| Sulfur, S | <= 0.030 % | <= 0.030 % |
| Electrical Properties | Metric | English | Comments |
|---|---|---|---|
| Electrical Resistivity | 0.0000560 ohm-cm | 0.0000560 ohm-cm |
| Descriptive Properties | Value | Comments |
|---|---|---|
| Corrosion Rate mils per year | 0.068 (5% Phosphoric Acid at 49°C) | Hardened martensitic grades were tested after tempering at 204°C |
| 1.11 (5% Acetic Acid at 49°C) | Hardened martensitic grades were tested after tempering at 204°C | |
| Pitting Potential, Volts vs. Sat. Calomel Electrode | 0.581 | 100 ppm Chloride solution at 24°C, pH5. Samples had ground surface. Hardened martensitic grades were tested after tempering at 204°C. |
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