EN24 / AISI 4340 equivalents, chemistry & properties.
EN24 / AISI 4340 is a alloy engineering steel used for heavy-duty shafts, gears, aircraft parts. Below are its equivalent designations in nine standards, chemical composition, mechanical properties and density.
EN24 / AISI 4340 equivalent grades
- India (IS)
- 40Ni2Cr1Mo28 (IS 1570)
- USA (ASTM / AISI / SAE)
- AISI / SAE 4340 (nearest)
- UNS
- G43400
- Europe (EN)
- 34CrNiMo6 (nearest)
- Werkstoff No. (W.Nr)
- 1.6582
- UK (BS)
- 817M40 (EN24)
- Japan (JIS)
- SNCM439
- China (GB)
- 40CrNiMoA
- Russia (GOST)
- 40XH2MA
Key data
- Family
- Alloy engineering steel
- Density
- 7.85 g/cm³
- Typical mechanical
- T condition about 850–1000 MPa; up to 1550 MPa
- Typical uses
- Heavy-duty shafts, gears, aircraft parts
- Weight
- Calculate weight in EN24 / AISI 4340
EN24 / AISI 4340 chemical composition (weight %)
BS 970 817M40 (EN24)
| C | Si | Mn | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|
| 0.36–0.44 | 0.10–0.35 | 0.45–0.70 | ≤0.035 | ≤0.040 | 1.00–1.40 | 1.30–1.70 | 0.20–0.35 |
AISI / SAE 4340 (SAE J404)
| C | Si | Mn | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|
| 0.38–0.43 | 0.15–0.35 | 0.60–0.80 | ≤0.035 | ≤0.040 | 0.70–0.90 | 1.65–2.00 | 0.20–0.30 |
Grades similar to EN24 / AISI 4340
Frequently asked questions
What is the equivalent of EN24 / AISI 4340?
EN24 / AISI 4340 equivalents: India (IS) 40Ni2Cr1Mo28 (IS 1570); USA (ASTM / AISI / SAE) AISI / SAE 4340 (nearest); UNS G43400; Europe (EN) 34CrNiMo6 (nearest); Werkstoff No. (W.Nr) 1.6582; UK (BS) 817M40 (EN24); Japan (JIS) SNCM439; China (GB) 40CrNiMoA; Russia (GOST) 40XH2MA. Equivalents are close but not always identical; check the standard on your order.
What is the chemical composition of EN24 / AISI 4340?
EN24 / AISI 4340 (BS 970 817M40 (EN24)): C 0.36–0.44, Si 0.10–0.35, Mn 0.45–0.70, P ≤0.035, S ≤0.040, Cr 1.00–1.40, Ni 1.30–1.70, Mo 0.20–0.35 (weight %).
What is the density of EN24 / AISI 4340?
About 7.85 g/cm³ (7,850 kg/m³), the value used for weight calculations.
Need EN24 / AISI 4340?
Steel Impex India, Mumbai, supplies EN24 / AISI 4340 in pipes, plates, sheets, bars and fittings as available, with mill test certificates. Send the grade, standard, size and quantity.