AISI/SAE 4340 Alloy Steel Bar DescriptionAISI 4340 is a commonly used alloy steel with high strength, high toughness, good wear resistance and corrosion resistance. Its moderate carbon content gives it good machinability and weldability. In addition, it also contains appropri
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Carbon Steel Bar
AISI/SAE 4340 Alloy Steel Bar
- Date.October 31, 2024
- Category.Carbon Steel Bar
- Keyword.Big fire special steel, high strength steel plate, steel industry supply and demand, steel suppliers
AISI/SAE 4340 Alloy Steel Bar Description
AISI 4340 is a commonly used alloy steel with high strength, high toughness, good wear resistance and corrosion resistance. Its moderate carbon content gives it good machinability and weldability. In addition, it also contains appropriate amounts of chromium, nickel and other elements, which further improves its performance. At the same time, its toughness and ductility are also quite good, and it can maintain good performance even in both high or low temperature environments. Due to the excellent physical and mechanical properties of 4340 steel, 4340 steel bars are also widely used in equipment manufacturing in corrosive environments such as petroleum, chemical industry, and ships.
Product Parameters
Product Name | AISI/SAE 4340 Alloy Steel Bar | |||
Standard | EN/DIN/JIS/ASTM/BS/ASME/AISI, etc. | |||
Common Round Bar Specifications | 3.0-50.8 mm, Over 50.8-300mm | |||
Flat Steel Common Specifications | 6.35x12.7mm, 6.35x25.4mm, 12.7x25.4mm | |||
Hexagon Bar Common Specifications | AF5.8mm-17mm | |||
Square Bar Common Specifications | AF2mm-14mm, AF6.35mm, 9.5mm, 12.7mm, 15.98mm, 19.0mm, 25.4mm | |||
Length | 1-6meters, Size Accept Custom | |||
Diameter(mm) | Hot Rolling Round Bar | 25-600 | Cold Rolling Square Bar | 6-50.8 |
Hot Rolling Square Bar | 21-54 | Cold Rolling Hexagon Bar | 9.5-65 | |
Cold Rolling Round bar | 6-101.6 | Forged Rebar | 200-1000 | |
Surface Process | Bright, Polished, Black | |||
Other Services | Machining(cnc), Centerless Grinding(cg), Heat Treatment, Annealing, Pickling, Polishing, Rolling, Forging, Cutting, Bending, Small Machining, etc. | |||
Chemical Composition
Grade | Mn | S | C | P | Si | Cr | Ni |
AISI 4340 | 0.60-0.80 | 0.035 | 0.38-0.43 | 0.04 | 0.15-0.35 | 0.70-0.90 | 1.65-2.00 |
Mechanical Properties
Grade | Tensile Strength kg f/mm2 | Yield Strength kg f/mm2 | Elongation % | Hardness HB |
AISI 4340 | ≥ 100 | ≥ 90 | ≥ 16 | 293-352 |
Scope of Application
AISI 4340 alloy steel is mainly used for power transmission gears and shafts, aircraft landing gear and other structural parts.
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