ASTM SAE4340 Alloy Steel Round Bar Annealed +Quenched SNCM439
Forged Round Rod
AISI/ASTM 4340 Alloy Steel Round Bar SAE AISI 4340 Steel
Properties, Heat Treatment SAE4340 Alloy Steel
40CrMnNiMo8-4 is another alloy which displays superior mechanical
properties. This material is available in the Annealed or Quenched
and Tempered conditions. 4340 is used many industries including oil
and gas exploration, gear manufactring etc.
Comparable Standards:
| AISI/SAE | DIN | W.Nr. | AFNOR | JIS | BS | SIAU | GB,YB |
| 4340 | 40CrMnNiMo8-4 | 1.6562 | - | SNCM439 | - | NCM4 | 40CrNiMoA |
Chemical Analysis (%):
| C | Mn | Si | Cr | Ni | Mo | P | S |
| 0.37-0.44 | 0.50-0.80 | 0.15-0.40 | 0.60-0.90 | 1.60-1.90 | 0.20-0.30 | ≤0.035 | ≤0.040 |
Mechanical properties
| Tensile str. (N/mm2) | Yield point (N/mm2) | Elongation (%) | Contraction (%) | Impack work (J/cm2) | Hardness (HB) |
| 980 | 835 | 12 | 205 | 55 | 269 |
| Heat Treatment(°C) | Physical Properties |
| Quenched | Tempered | Thermal Conductivity
(20°C)Wm-1. ok-1 | Typical Thermal expansion coefficient (20-200°C) | Specific Heat
(20°C) | Density
(20°C) |
| 850 | 600 | 12 | 12.7 | | |
AISI 4340 Alloy Steel Round Bar
Applications:
- AISI 4340 Alloy Steel Used for manufacture big sized important
Quenched-and-Tempered parts which request good toughness and high
strength. Such as top load shaft in heavy-duty machinery.
- AISI 4340 Alloy Steel Used for steam turbine shaft, vane, and
heavy-load transmission parts, fastening piece, crankshaft, gears
etc. With diameter is biger than 250mm.
Description:
1. AISI 4340/GB40CrNiMo/DIN 1.6511 alloy steel round bar
2. Hot rolled or forged condition, annealing, black or milled
surface
3. Hardness: ≤220HBS;
4. Hot rolled technology: EAF+LF+VD
Forged technology: EAF+LF+VD+ESR+Forging +Q T + Machined surface
5. Ultrasonic test standard: SPE1921-GR3, CLASS D/D or E/E
6. Production leadtime: 7~10 days
Competitive Advantage:
- High strength,
- High tenacity
- Good hardenability
- High resistance to thermal properties.
- Competitive price
- Fast production leadtime
- All the material are inspected with 3 times to meet the highly
standards
MITTEL Specializes in plastic mould steel, hot work mould steel,
cold work mould steel alloy steel and carbon structural steel, such
as: P20, P20+Ni, 1.2714,
1.2083, 1.2316, H13, O1, D2, D3, D5, 1045, 1050, A3, 52100(EN31),
4137, 4140, 4340,
5140, 6150, 8620 and SCM420 for exporting over 20 countries now,
such as: Brazil, India,
Turkey, Italy, Germany, Korea, Malaysia, Iran and so on.
Our company have introduced large-sized Vertical saw machines,
horizontal saw machines,
Milling machines, Grinding machines and other advance equipments,
we can export our
products by wholesales and retail sales, whole plate or strip is
available. All our products
can meet the standards of DIN, AISI, JIS and GB, all the material
should be inspected the
ultrasonic, hardness and others strict inspection process before
the shipment!
FAQ
Q: Are you trading company or manufacturer ?
A: We are factory and trading company
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is
15-20 days if the goods are not in stock, it is according to
quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay
the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30%
T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us as below:
