Chemical Composition
Chemical Composition (wt%) limits as specified in ASTM A240 and ASME SA240*
| Element | 441 |
| Carbon | 0.030 |
| Chromium | 17.5-19.5 |
| Nickel | 1.00 |
| Manganese | 1.00 |
| Silicon | 1.00 |
| Nitrogen | 0.030 |
| Phosphorus | 0.040 |
| Sulfur | 0.030 |
| Titanium | 0.1-0.5 |
| Niobium |
0.3 + (9 x C) min |
* Maximum, unless range is indicated
Mechanical Properties
Mechanical property requirements for annealed product as specified in ASTM A240 and ASME SA240
| Property | 441 |
| Yield Strength, min. (ksi) | 35 |
| Tensile Strength, min. (ksi) | 60 |
| Elongation, min. (%) | 20 |
| Hardness, max. (Rb) | 90 |
Physical Properties
Physical properties for Type 441 stainless steel
| Property | 441 |
| Density, lb/in3 | 0.278 |
| Modulus of Elasticity, psi | 29.0 x 106 |
| Coefficient of Thermal Expansion, 68-212˚F, /˚F | 5.7 x 10-6 |
| Thermal Conductivity, Btu/ft hr ˚F | 12.1 |
| Specific Heat, Btu/lb ˚F | 0.11 |
| Electrical Resistivity, Microohm-in | 23.1 |
