Chemical Composition Chart
The Fundamental DNA of Engineering Steels.
A steel's performance—its strength, hardness, toughness, and machinability—is dictated by its precise chemical makeup. This comprehensive, searchable chart provides the fundamental data for all our major grades in one convenient place, empowering you to compare materials and verify the foundational chemistry of your components.
| Grade | C % | Si % | Mn % | P % (max) | S % (max) | Cr % | Mo % | Ni % | B % | Pb % |
|---|---|---|---|---|---|---|---|---|---|---|
| EN8D/C45 | 0.40-0.48 | 0.10-0.40 | 0.60-0.90 | 0.040 | 0.050 | - | - | - | - | - |
| EN9 | 0.50-0.60 | 0.05-0.35 | 0.50-0.80 | 0.050 | 0.050 | - | - | - | - | - |
| SAE 1018 | 0.15-0.20 | - | 0.60-0.90 | 0.040 | 0.050 | - | - | - | - | - |
| SAE 1541 | 0.36-0.44 | - | 1.35-1.65 | 0.040 | 0.050 | - | - | - | - | - |
| EN18 | 0.35-0.45 | 0.10-0.35 | 0.60-0.90 | 0.040 | 0.050 | 0.80-1.10 | - | - | - | - |
| EN19/4140 | 0.36-0.44 | 0.10-0.35 | 0.50-0.80 | - | - | 0.90-1.20 | 0.20-0.35 | - | - | - |
| EN24 | 0.36-0.44 | - | 0.45-0.70 | - | - | 1.00-1.40 | 0.20-0.35 | 1.30-1.70 | - | - |
| EN31/52100 | 0.95-1.10 | 0.10-0.35 | 0.40-0.70 | - | - | 1.20-1.60 | - | - | - | - |
| 16MnCr5 | 0.14-0.19 | 0.40 max | 1.00-1.30 | - | - | 0.80-1.10 | - | - | - | - |
| 20MnCr5 | 0.17-0.22 | 0.40 max | 1.10-1.40 | - | - | 1.00-1.30 | - | - | - | - |
| 8620 | 0.18-0.23 | - | 0.70-0.90 | - | - | 0.40-0.60 | 0.15-0.25 | 0.40-0.70 | - | - |
| SCM420 | 0.18-0.23 | 0.15-0.35 | 0.60-0.90 | - | - | 0.90-1.20 | 0.15-0.30 | - | - | - |
| EN353 | 0.14-0.20 | - | 0.50-0.90 | - | - | 0.75-1.15 | - | 3.00-3.75 | - | - |
| EN42 | 0.75-0.85 | 0.10-0.35 | 0.50-0.80 | - | - | - | - | - | - | - |
| SAE 9254 | 0.51-0.59 | 1.20-1.60 | 0.60-0.80 | - | - | 0.60-0.80 | - | - | - | - |
| EN1A | 0.07-0.15 | - | 0.80-1.20 | 0.07 max | 0.25-0.35 | - | - | - | - | - |
| EN1AL | 0.07-0.15 | - | 0.80-1.20 | 0.07 max | 0.25-0.35 | - | - | - | - | 0.15-0.35 |
| 12L14 | 0.15 max | - | 0.85-1.15 | 0.04-0.09 | 0.26-0.35 | - | - | - | - | 0.15-0.35 |
| EN8M | 0.35-0.45 | 0.10-0.40 | 1.00-1.30 | 0.050 | 0.20-0.30 | - | - | - | - | - |
| 10B21 | 0.18-0.23 | - | 0.70-1.00 | 0.030 | 0.035 | - | - | - | .0005-.003 | - |
| 15B25 | 0.22-0.29 | - | 1.10-1.40 | 0.030 | 0.035 | - | - | - | .0005-.003 | - |
| 15B41 | 0.37-0.44 | - | 1.35-1.65 | 0.030 | 0.035 | - | - | - | .0005-.003 | - |
| 51B37 | 0.35-0.40 | - | 0.75-1.00 | - | - | 0.70-0.90 | - | - | .0005-.003 | - |