OTAI Steel professional supply EN24 equivalent 40CrNiMo, which is China standard grade, can be AISI 4340, Din 36CrNiMo4, W-Nr 1.6511 equivalent as well. Generally speaking, they can be equivalent each other if not very special application condition.
Most customer purchase 40CrNiMo as EN24 equivalent, especially customer from British, Middle east, and Africa. We sell large quantity to such district big quantity each year. China standard 40CrNiMo are widely accepted as EN24 equivalent and other grade SAE 4340, Din 36CrNiMo4, and W-Nr 1.6511 word wide for reasons as following:
- Mechanical Performance for 40CrNiMo and EN24 steel are similar
- Price for 40CrNiMo is much cheaper compared other mentioned grade above
- 40CrNiMo is the most widely used engineering alloy steel in China, usage is huge, stock is always enough, can support quickly shipment.
- China standard steel quality is good, and qualified at almost all condition EN24, SAE 4340, Din 36CrNiMo4, and W-Nr 1.6511 applied.
Below table is chemical composition for EN24 equivalent 40CrNiMo and other mentioned grade.
| Item | C(％) | Si(％) | Mn(％) | P(％) | S(％) | Cr(％) | Ni(％) | Mo(％) | Standard |
| EN24 | 0.36～0.44 | 0.10～0.40 | 0.45～0.70 | ≤0.035 | ≤0.04 | 1.00～1.40 | 1.30～1.70 | 0.20～0.35 | BS 970-1(1996) |
| 4340 | 0.38～0.43 | 0.15～0.35 | 0.60～0.80 | ≤0.035 | ≤0.04 | 0.70～0.90 | 1.65～2.00 | 0.20～0.30 | ASTM A304 |
| 40CrNiMo | 0.37~0.44 | 0.17~0.37 | 0.50~0.80 | ≤0.025 | ≤0.025 | 0.60~0.90 | 1.25~1.65 | 0.15~0.25 | GB/T 3007-1999 |
| 36CrNiMo4/1.6511 | 0.32~0.40 | ≤0.4 | 0.50~0.80 | ≤0.025 | ≤0.035 | 0.90~1.20 | 0.90~1.20 | 0.15~0.30 | DIN EN10083 |
OTAI Special steel focus on special steel industry above 20 years. Besides alloy steel, our other main group are tool steel, high speed steel and high quality carbon steel. Our professional engineer always provide our customer most suitable technique proposal, which will help customer save cost a lot.
Last week, one customer send us inquiry for EN24, they are large steel holders in Middle East. He send us the dimensions from diameter 20mm to 200mm, length 6 meters. All are regular size. They need heat treatment Q+T. We provide production lead time 40 days consider Q+T process. They have no problem about the lead time, but EN24 price is not competitive. Then our engineer commend them take EN24 equivalent 40CrNiMo instead. After check chemical composition, mechanical property of EN24 equivalent 40CrNiMo, customer take our proposal, and decide to go ahead EN24 equivalent 40CrNiMo soon. That’s great. Not only save cost for our customer, also this will become the first order from this Middle East country. EN24 equivalent 40CrNiMo will help customer expand their business in local market for sure. Looking forward good cooperation in future.
If you are purchasing material EN24, SAE 4340, Din 36CrNiMo4, and W-Nr 1.6511, you can contact us for a trail. It is good option for you to consider China standard 40CrNiMo. You are welcome contact us for other product as well.
Ms Susie Li
Mobile/WhatsApp: 0086-13826999755
Tel: 0086-769-23190193
Fax: 0086-769-88705839
Email: Susie@otaisteel.com
