403Cb, 410Cb, B50A790, XM-30, UNS S41040
403Cb, 410Cb is a martensitic stainless steel, this alloy has higher strength and toughness, the addition of columbium can improve grain size control and make it easier to heat treat, mainly used in electrical energy.
Chemical Composition
| Grade | Chemical composition WT % | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Cr | Ni | Mo | W | V | Ti | N | Sn | Al | Cu | Co | |
| 403Cb, B50A947 | 0.06-0.15 | 0.5 | 0.25-0.65 | 0.025 | 0.010 | 11.25-13 | 0.6 | 0.3 | 0.1 | Tried | 0.05 | Tried | 0.05 | 0.025 | 0.2 | 0.2 |
Mechanical Properties
403Cb Mechanical properties acc. to B50A947
- Tensile strength Rm MPa: Min 760
- Yield Strength Rp MPa: Min 555
- Elong In2 inches %: min 15
- RA %: min 15
- Brinell Hardness, 3000Kg Load %: 223-269
- V-Notch Charpy Min. Energy at R.T. ft-lbs(J): min 25(33.9)
Physical Properties
Heat Treatment
Thermal Properties
Welding Properties
Good welding property
Machining Properties
Good machining property