الفولاذ هو سبيكة من الحديد والكربون. الفولاذ المقاوم للصدأ هو فولاذ يحتوي على ما لا يقل عن 10.5% من الكروم، وأقل من 1.2% من الكربون وعناصر سبيكة أخرى. يمكن تعزيز مقاومة الفولاذ المقاوم للصدأ للتآكل وخصائصه الميكانيكية بإضافة عناصر أخرى، مثل النيكل والموليبدينوم والتيتانيوم والنيوبيوم والمنغنيز، إلخ.
| الدرجة | C | نعم | Mn | P | S | Cr | ني | مو | N | Cu |
| 201 | ≤0.15 | ≤0.75 | 5.5~7.5 | ≤0.060 | ≤0.03 | 16.00~18.00 | 3.5~5.5 | – | – | 0.08 |
| 202 | ≤0.15 | ≤1.00 | 7.5~10.00 | ≤0.060 | ≤0.03 | 17.00~19.00 | 4.0~6.0 | – | ≤0.25 | |
| 301 | ≤0.15 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 16.00~18.00 | 6.00~8.00 | – | | |
| 302 | ≤0.15 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.03 | 17.00~19.00 | 8.00~10.00 | – | | |
| 304 | ≤0.07 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 18.00~20.00 | 8.00~10.50 | – | | |
| 304L | ≤0.030 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 18.00~20.00 | 9.00~13.00 | – | | |
| 310S | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 24.00~26.00 | 19.00~22.00 | – | | |
| 316 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 16.00~18.00 | 10.00~14.00 | 2.00~3.00 | | |
| 316L | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 16.00~18.00 | 12.00~15.00 | 2.00~3.00 | | |
| 321 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.03 | 17.00~19.00 | 9.00~13.00 | – | | |
| 430 | ≤0.12 | ≤0.75 | ≤1.00 | ≤0.040 | ≤0.03 | 16.00~18.00 | | – | | |
| 2205 | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.030 | ≤0.015 | 22.00~23.00 | 4.5~6.5 | 2.5~3.5 | | |
| 2507 | ≤0.03 | ≤0.08 | ≤1.20 | ≤0.035 | ≤0.015 | 24.00~26.00 | 6.00~8.00 | 3.0~5.0 | | |
| 904L | ≤0.02 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.035 | 19.00~23.00 | 23.00~28.00 | 4.0~5.0 | | 1.0~2.0 |
| INCONEL028 | ≤0.03 | ≤1.00 | ≤2.50 | ≤0.030 | ≤0.030 | ≤28.0 | ≤34.0 | ≤4.0 | | ≤1.4 |
| MONEL400 | ≤0.30 | ≤0.5 | ≤2.00 | – | ≤0.024 | – | ≥63.0 | – | | ≤34.0 |
| INCONEL800 | ≤0.10 | ≤1.00 | ≤1.50 | – | ≤0.015 | ≤23.0 | ≤35 | 4.0~5.0 | – | ≤0.75 |
