ASTM SAE4340 DIN 1.6511 Alloy Round Rod SNCM439/40CrNiMoA Quenching For High Strength Shafts
ASTM SAE4340 90mm Dia Alloy Round Bar SNCM439/40CrNiMoa Alloy Round Steel Bar
| grade | SNCM439/4340/40CrNiMo |
| application |
widely used in the areas as ss fasteners , chains , kitchen and sanitary wares , furniture handles , handrails , electroplating and electrolyzing pendants , foods, electron , petroleum , construction and decoration , etc. with a high strength after cold-drawn , anti-stress corrosion , good surface . |
| chemcial composition | according to international standards of ASTM , AISI , JIS , ER , GB ,etc. |
| contact | Welcome your inquiries and hope we can build good & long cooperation |
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.
Equal Standards
| Chinese | American | German | Japanese | British |
| GB | AISI | DIN | JIS | BS |
| 40CrNiMo | SAE4340 | 1.6511 | SNCM439 | EN24 |
Chemical Composition
| Grades | C | Si | Mn | P | S | Cr | Mo | Ni | |
| AISI 4340 | 0.38-0.43 | 0.15-0.35 | 0.6-0.8 | ≤0.035 | ≤0.040 | 0.70~0.90 | 0.20~0.30 | 1.65~2.00 | |
| GB 40CrNiMo | 0.37~0.44 | 0.17~0.37 | 0.50~0.80 | ≤0.025 | ≤0.025 | 0.60~0.90 | 0.15~0.25 | 1.25~1.65 | |
| 40NiCrMo7 | 0.37-0.44 | 0.15-0.4 | 0.5-0.8 | ≤0.035 | ≤0.035 | 0.60~0.90 | 0.2-0.3 | 1.6-1.9 | |
| W.Nr. 1.6511 | 0.35~0.45 | ≤0.40 | 0.60~0.80 | ≤0.035 | ≤0.040 | 0.90~1.20 | 0.15~0.30 | 1.40~1.70 | |
Heat Treatment
| Quenching | Tempering | ||||
| Heating Temperature/ºC | Cooling | Hardness/HRC | Heating Temperature/ºC | Cooling | Hardness/HRC |
| 820-840 | Oil | ≥53 | 450-650 | Air | 25-40 |
| Tensile strength (psi) | 105,000 - 115,000 |
| Yield strength (psi) | 75,000 - 85,000 |
| Elongation in 2" (%) | 20 - 30 |
| Reduction of area (%) | 35 - 45 |
| Brinell Hardness (BHN) | 210 - 240 |
Aircraft Landing Gear
Power Transmission Gears
Structural Use Applications
High strength shafts
Punches & dies
Drill bushings
Retaining rings
Gears
Available stock size
| Plate | Thickness | 20-120mm |
| Width | 2200mm | |
| Length | 4000-10000mm | |
| round bar | Diameter | 20-500mm |
| Length | 3000-6000mm |
Q1: Why choose us?
A: Our company, as an internationally experienced and professional supplier, has been engaged in steel business for more than ten years. We can provide a variety of steel products with high quality to our clients.
Q2: Can you provide OEM/ODM service?
A: Yes. Please feel free to contact us for more details.
Q3:What is your terms of payment?
A: 100% T/T advance.
30% T/T and balance against copy of documents.
30% T/T advance, balance L/C at sight.
Q4: Can we visit your factory?
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.
Q5: Can you provide sample?
A: Yes. Sample is free for regular sizes, but the buyer needs to pay freight cost.
Q6: How long is your delivery time?
A: Regular lead time is 15 to 30 days after receiving deposit.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.