EN19 vs EN24 difference in composition & properties.
EN24 contains nickel (1.3–1.7%); EN19 has no minimum for it.
Key differences between EN19 and EN24
- EN24 contains nickel (1.3–1.7%); EN19 has no minimum for it.
EN19 vs EN24 chemical composition (weight %)
| Element | EN19 | EN24 |
|---|---|---|
| C | 0.36–0.44 | 0.36–0.44 |
| Si | 0.1–0.35 | 0.1–0.35 |
| Mn | 0.7–1 | 0.45–0.7 |
| P | ≤0.035 | ≤0.035 |
| S | ≤0.04 | ≤0.04 |
| Cr | 0.9–1.2 | 1–1.4 |
| Mo | 0.25–0.35 | 0.2–0.35 |
| Ni | – | 1.3–1.7 |
Mechanical properties, equivalents and uses
| Property | EN19 | EN24 |
|---|---|---|
| Family | Alloy engineering steel | Alloy engineering steel |
| Tensile strength, MPa | 700–850 | 850–1000 |
| Yield strength, MPa | – | – |
| Elongation, % | – | – |
| Hardness | 201–255 HB | 248–302 HB |
| Density, g/cm³ | 7.85 | 7.85 |
| UNS | G41400 | G43400 |
| EN | 42CrMo4 | 34CrNiMo6 (nearest) |
| W.Nr | 1.7225 | 1.6582 |
| JIS | SCM440 | SNCM439 |
| IS (India) | 40Cr4Mo3 (IS 1570) | 40Ni2Cr1Mo28 (IS 1570) |
| AISI / ASTM | AISI / SAE 4140 | AISI / SAE 4340 (nearest) |
| Typical uses | High-stress shafts, gears, high-tensile bolts, hydraulic parts | Heavy-duty shafts, gears, aircraft parts |
Mechanical values: Condition R, hardened and tempered (BS 970 tensile band) / Condition T, hardened and tempered (BS 970 tensile band). Limits vary by standard and product form; confirm against your purchase specification.
Frequently asked questions
What is the difference between EN19 and EN24?
EN24 contains nickel (1.3–1.7%); EN19 has no minimum for it.
Where are EN19 and EN24 used?
EN19: High-stress shafts, gears, high-tensile bolts, hydraulic parts. EN24: Heavy-duty shafts, gears, aircraft parts.
Can EN24 replace EN19?
Only if the purchase specification allows it. Check the governing standard, chemistry limits and mechanical properties against the order, and confirm on the mill test certificate.
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Mill test certificate (EN 10204 3.1) supplied with material; third-party inspection on request.
Reference basis: Compiled by Steel Impex India. Check each table’s source, product form and delivery condition before use. Sources, calculation methods and corrections.