Pob unplât dur di-staenmae ganddo ei gyfansoddiad a'i nodweddion cemegol unigryw ei hun, sy'n addas ar gyfer gwahanol feysydd cais.
Graddau Cyfwerth o Platiau Dur Di-staen 409/410/420/430/440/446
| Gradd | WERKSTOFF NR. | UNS | AFNOR | BS | JIS |
| SS 409 | 1.4512 | S40900 | Z3CT12 | 409 S 19 | SUS 409 |
| SS 410 | 1.4006 | S41000 | - | 410S21 | SUS 410 |
| SS 430 | 1.4016 | S43000 | BF Z 3 CN 19-09 | - | - |
| SS 440 | 1.4125 | S44000 | - | - | - |
Cyfansoddiad Cemegol Platiau Dur Di-staen 409/410/420/430/440/446
| Graddau | C | Ni | Si | S | Mn | P | Cr | T i |
| SS 409 | 0.08 | 0.5 | 1.0 | 0. 045 | 1.0 | 0. 045 | 11.75 -10.5 | - |
| SS 410 | 0.15 uchafswm | 0.50 uchafswm | 1.0 | 0.030 | 1.0 | 0. 040 | 11.5 – 13.5 | - |
| SS 430 | 0.12 | 1.0 | 0.030 | 1.0 | 0. 040 | 16.0 | - | - |
| SS 440 | 0.95-1.20 | - | 1.0 | 0.030 | 1.0 | 0. 040 | 16.00-18.00 | - |
EIDDO MECANYDDOL DUR Di-staen 409/ 410/ 410S/ 420/ 430/ 440/ 446 PLATIAU
| Graddau | Dwysedd | Ymdoddbwynt | Cryfder Tynnol | Cryfder Cynnyrch (Gwrthbwyso 0.2%) | Elongation | Caledwch (Brinell) MAX | Caledwch (Rockwell B) MAX |
| SS 409 | 8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % | - | - |
| SS 410 | - | 65 (450) | 30 (205) | 20 | 217 | 96 | |
| SS 430 | - | 450 | 205 | 22 | 89 | 183 | |
| SS 440 | - | 95,000 psi | 50,000 psi | 25% | 175 | - |
Amser postio: Mehefin-27-2023