Product Description
AISI4340 Alloy Steel Round Bar / Alloy Steel Bar Diameter 13 - 300mm in 6m Length
| Products | Alloy Steel Round Bar |
| Diameter | 13 - 300mm |
| Length | 6m or custom cutting as request |
| Grade | 4340 Alloy Steel |
| Our Service | Cutting , polishing, packing, heat treatment |
| Brand | BAOSTEEL , XINGCHENG, DSS,CHONGQING, XNSS,HLXT.etc |
| Standard | GB , ASTM , JIS , EN , DIN |
| Company Type | storgae company and process service |
AISI 4340 steel (UNS G43400) is an ultra-high strength medium carbon low alloy steel, which combines deep hardenability, high ductility, toughness and strength, and has high fatigue resistance and creep resistance. It is not particularly affected by tempering and embrittlement, and exhibits good strength retention at high temperatures and is not easily softened. In thin sections, this steel is air-hardened. In practice, it is usually oil quenched.
Chemical Composition of 4340 Alloy Steel
AISI 4340 steel material chemical composition is listed in the following table based on cast analysis.
| 4340 Chemical Composition, % | ||||||||||
| ASTM | Steel Grade (UNS) | C | Si | Mn | P (≤) | S (≤) | Ni | Cr | Mo | Notes |
| ASTM A29/A29M | 4340 alloy steel (UNS G43400) | 0.38-0.43 | 0.15-0.35 | 0.60-0.80 | 0.035 | 0.04 | 1.65-2.00 | 0.70-0.90 | 0.20-0.30 | Steel Bars, Carbon and Alloy, Hot-Wrought |
| ASTM A322 | Steel Bars, Alloy, Standard Grades | |||||||||
| ASTM A519/A519M | Seamless Carbon and Alloy Steel Mechanical Tubing | |||||||||
| ASTM A646/A646M | Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings | |||||||||
Mechanical Properties of 4340 Alloy Steel
4340 steel mechanical properties are listed in the following tables.
| AISI 4340 Mechanical Properties | ||||||
| Steel | Condition | Tensile strength, MPa (ksi), ≥ | Yield strength, MPa (ksi), ≥ | Elongation in 50 mm (2 in.), ≥ | Reduction in area, %, ≥ | Hardness, HB, ≤ |
| 4340 | Normalized at 870 °C (1600 °F) | 1282 (186) | 862 (125) | 12.2 | 36.3 | 363 |
| Annealed at 810 °C (1490 °F) | 745 (108) | 470 (68) | 22.0 | 50.0 | 217 | |
| Oil quenched from 800 °C (1475 °F) and tempered at 540 °C (1000 °F) | 1207 (175) | 1145 (166) | 14.2 | 45.9 | 352 | |
Applications of 4340 Alloy Steel
SAE AISI 4340 steel is usually used in places where severe conditions exist and heavy parts requiring high strength, and can be widely used as billet, bar, bar, forging, sheet, pipe and welding wire. AISI 4340 steel can also be produced as light plates and castings. Typical applications include bolts, screws and other fasteners. Gears, pinions, shafts and similar mechanical components; crankshafts and piston rods of engines; and landing gear and other key structural components of aircraft.
Equivalent of 4340 Alloy Steel
ASTM AISI 4340 steel equivalent to SAE, European (German DIN, British BSI, France NF), Japanese JIS and Chinese GB standard (for reference).
| AISI 4340 equivalent | |||||||||||
| US | European Union | China | Japan | ISO | |||||||
| Standard | Grade (UNS) | Standard | Grade | Standard | Steel name (Steel number) | Standard | Grade | Standard | Grade | Standard | Grade |
| AISI SAE; ASTM A29/A29M; ASTM A322; ASTM A519/A519M; ASTM A646/A646M | 4340 (UNS G43400) | SAE | AMS6414 | GB/T 3077 | 40CrNi2Mo | JIS G 4053 | SNCM439 | ||||
Company Informations
Our company's main material of all kinds of round steel, ling Steel, Xuan Steel, Benshan Steel, Tiangang, Shandong Luli steel, rongcheng steel, Professional, Handan, Laigang, Jiyuan steel and other major steel mills all kinds of excellent special steel designated agents in Tianjin, monthly sales of all kinds of steel 40,000-60000 tons.
We have more than 4 warehouse for stock our bars. About 30 grade of products keep in stock long time, more than 800 size ensure the short deliver time for clients.
We have a warehouse specially for steel round bar processing, include cutting, polishing, heat treatment.etc
The company's sales network throughout the world, products are widely used in a variety of machinery, standard parts, automobiles, gears, forging, hardware tools and other industries.
We manufacture the following popularly used grades:
| EN19, EN24, EN25, EN26, EN30, EN31, EN36C, EN39, EN 40, EN41B, EN42, EN9, EN14A, EN15, EN16, EN18, EN47, EN100, EN351, EN353, EN354, EN355, C22E, C25E, C30, C35E, C45, CK45, C50, C55, C60, S45C, S235J2, S275J2, S355J2, ST52.3, C35E, C45R, 35B2, 28Mn6, 46Cr2, 34Cr4, 41Cr4, 20Mn5, 42CrMo4, 50CrMo4, 30CrNiMo8, 34CrNiMo6, 36CrNiMo4, 36NiCrMo16, 51CrV4 27MnCrB5, 32CrB4, 25CrMo4, 20MnCr5, 16MnCr5, 16MnCrS5,17CrNiMO6, 18CrNiMo7, 20MnB4, 23MnB4, 23MnB3, 34CrMo4V, SS410, SS416, SS420, SS431, SCM420, SCM440, 13Ni13Cr3, 15Ni16Cr5, 36Si7, 40Cr4, 15Ni5Cr4Mo1, 15Ni7Cr4Mo2, 16Ni8Cr6Mo2, 36Si7, 37C15, 35Mn6Mo3, 40Ni6Cr4Mo3, 40Ni10Cr3Mo6, 55Si7, 50Cr4V2, 25Cr13Mo6, 10C8S10, 14Cr14S14, 25C12S14, 40C10S18, 11C10S25, 40C15C12, |
| SAE 1010, SAE1025, SAE1030, SAE 1035, SAE 1040, SAE 1117, SAE1541H, SAE4130, SAE4135, SAE4140, SAE4145, SAE4145H, SAE 4330, SAE 4340, SAE 4820, SAE5160, SAE8620, SAE 8630, SAE8640, SAE52100, SAE9310, AISI1010, AISI1025, AISI1030, AISI 1035, AISI 1040, AISI 1117, AISI1541H, AISI 4130, AISI4135, AISI4140, AISI4145, AISI4145H, AISI 4330, AISI 4340, AISI4820, AISI 5160, AISI 8620, AISI 8630, AISI 8640, AISI 9310 |
| BS970 080A15, 080M15, 070M20, 080A30, 080M30, 080M40, 080A42, 080A47, 080M50, 070M55, 150M19, 150M36, 045A10, 045M10, 080M15, 210M15, 635M15, 637M17, 655M13, 665M17, 805M17, 805M20, 815M17, 820M17, 822M17, 835M15, 530M40, 605M36, 606M36, 708M40, 709M40, 722M24, 817M40, 826M31, 826M40, 945M38, 410S21, 416S21, 416S29, 420S29, 420S37, 431S29 |
| EN 10088-3 X12Cr13, X20Cr13, X30Cr13, X17CrNi16-2 |
| ASTM A105, ASTM A182 F5, ASTM A182 F9, ASTM A182 F11, ASTM A182 F12, ASTM A182 F22, ASTM A182 F91, ASTM A182 F92, ASTM A350 LF2, ASTM B16, ASTM A193 B7, ASTM A193 B16, ASTM A266 Grade 1-2-3 and 4, ASTM A29 all grades, ASTM A540 B21, ASTM A540 B22, ASTM A540 B23, ASTM A540 B24, ASTM A540 B24V |
| X22CrMoV121, 21CrMov57, 40CrMoV4-6, 27NiCrMoV15-6, 26 NiCrMo 14-6, 20CrMoVTiB4-10, X19CrMoNbVN11-1, X10CrMoVNb9-1 |
| DIN 1.2714/DB6, DIN1.2343/AISI H11, Din 1.2344/AISI H13 |
| GOST 4543-71 33XC, 38XC, 40XC, 45XH, 30XH3A, 12X2H4A, 20X2H4A, 20X2H4MA, 18X2H4MA, 30XGCA, 40ХН2МА, 40Х2Н2MA, 30ХН2МА |
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