Steel round bar AISI 4340/SAE 4340
The AISI steel round bar (AISI) 4340/SAE 4340, used in many applications, is made from high-strength low-alloy steel, supplemented with molybdenum, nickel, chromium, manganese, sulfur, phosphorus and silicon.
Properties (features)
AISI 4340 steel is characterized by the following advantages:
the possibility of using the material in power shafts, spindles, bolts, connecting rods, gears, transmissions, instruments, aircraft landing gear, and other components and parts;
corrosion and weather resistance;
effective resistance to changes in humidity, alkaline, acidic compounds, as well as other destabilizing factors;
resistance to mechanical (deformation) loads;
affordable price.
Steel bar 4340/SAE 4340: price and sale
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Chemical content AISI 4340/SAE 4340
| Standard | Grade | C | Mn | P | S | Si | Ni | Cr | Mo |
| ASTM A29 | 4340 | 0.38-0.43 | 0.60-0.80 | 0.035 | 0.040 | 0.15-0.35 | 1.65-2.00 | 0.70-0.90 | 0.20-0.30 |
Mechanical characteristics AISI 4340/SAE 4340
| Condition | Ruling section mm | Tensile Strength MPa | Yield Strength MPa | Elong. % | Izod Impact J | Brinell Hardness |
| T | 250 | 850-1000 | 635 | 13 | 40 | 248-302 |
| T | 150 | 850-1000 | 665 | 13 | 54 | 248-302 |
| U | 100 | 930-1080 | 740 | 12 | 47 | 269-331 |
| V | 63 | 1000-1150 | 835 | 12 | 47 | 293-352 |
| W | 30 | 1080-1230 | 925 | 11 | 41 | 311-375 |
| X | 30 | 1150-1300 | 1005 | 10 | 34 | 341-401 |
| Y | 30 | 1230-1380 | 1080 | 10 | 24 | 363-429 |
| Z | 30 | 1555- | 1125 | 5 | 10 | 444- |
Forms of supply AISI 4340/SAE 4340 round bars
| Steel bars | |
| Steel grade | Sizes (mm) |
| AISI 4340/SAE 4340 | 20-800 |
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