SAE 4340 Hot Rolled Round Bars Dia 16mm to 200mm

SAE 4340 Hot Rolled Round Bars Dia 16mm to 200mm

₹91.00 for Non-Indian / Export Buyers | ₹107.38 incl. 18% GST per Kg for Indian Buyers

SAE 4340 Hot Rolled Bars
SAE 4340 is a high-strength, low-alloy steel known for its exceptional toughness and durability. Ideal for demanding applications in aerospace, automotive, and oil & gas industries, these bars offer a tensile strength of 930-1080 MPa and a yield strength of 780 MPa. Available in custom lengths, with optional rust prevention and full traceability. Perfect for gears, shafts, crankshafts, and other high-stress components. Order now for reliable, high-performance steel solutions!

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Description

SAE 4340 Hot Rolled Bars / Black Bars - Delivery Conditions

Section Round
Size Range 16mm to 200mm
Condition Hot Rolled
Tolerance offered As per SAE 4340 specifications
Standard Hot Rolled Bars to generally conform to relevant standards
Straightness As per applicable standards
Ovality Not specifically controlled, but within tolerance limits
Lengths offered In full lengths up to 12000 mm / 40ft. With prior agreement, fixed/custom lengths can also be offered.
Straightened No, as rolled condition.
Polished No
End Cut Condition Generally supplied with as-rolled ends. Special end cuts or deburred ends can be offered upon request.
Colour Coding Both ends are colour coded for easy identification. Buyer's colours can also be applied.
Rust Preventive Hot Rolled Bars can be supplied with rust preventive coating upon request
Packing Loose or Bundled with tie strings or wire and/or packed in chosen packing material
Test Report Test Certificates for Chemical, Mechanical, and Physical properties as per agreement
Typical Mechanical Properties
  • Tensile Strength: 930 - 1080 MPa
  • Yield Strength: 780 MPa min
  • Elongation: 12% min
  • Hardness: 217 - 269 HB
Chemical Composition
  • Carbon (C): 0.38% - 0.43%
  • Manganese (Mn): 0.60% - 0.80%
  • Chromium (Cr): 0.70% - 0.90%
  • Nickel (Ni): 1.65% - 2.00%
  • Molybdenum (Mo): 0.20% - 0.30%
  • Phosphorus (P): 0.035% max
  • Sulfur (S): 0.040% max
  • Silicon (Si): 0.15% - 0.35%
  • Iron (Fe): Balance
Applications SAE 4340 is widely used in the manufacturing of high-strength components like aircraft landing gear, crankshafts, connecting rods, gears, and other high-stress applications in the aerospace, automotive, and oil & gas industries.
Melting & Refining Method SAE 4340 is generally produced using Electric Arc Furnace (EAF) or Basic Oxygen Furnace (BOF) methods, with secondary refining like Vacuum Degassing (VD) and Ladle Refining Furnace (LRF) for superior quality.
Rolling Route The material is produced via the Continuous Casting route, where molten steel is cast into billets and then hot rolled into desired bar sizes.
Quality Control Strict quality control processes are implemented, including chemical analysis, mechanical testing, and dimensional checks to ensure product quality.
Surface Condition Hot Rolled Bars may have a scale-covered surface, which can be removed through pickling, shot blasting, or machining as per customer requirements.
Traceability Each batch is fully traceable back to its heat number, ensuring documentation of all chemical and mechanical properties.

Equivalents / similar steels to SAE 4340 / AISI 4340:

  • British Standard (BS): BS 970 817M40
  • Indian Standard (IS): IS 5517 40Ni2Cr1Mo28
  • American (ASTM): ASTM A322 Grade 4340, ASTM A331 Grade 4340
  • European (EN): EN 10083-3 34CrNiMo6
  • Japanese (JIS): JIS G4105 SNCM439
  • German (DIN): DIN 1.6582, 34CrNiMo6
  • French (AFNOR): AFNOR 35NiCrMo16
  • Italian (UNI): UNI 35NiCrMo12
  • Russian (GOST): GOST 4543 36NiCrMo4
  • Korean (KS): KS SNCM439
  • Chinese (GB): GB/T 3077 40CrNiMoA
  • Canadian (CSA): CSA G40.21 50CrMoNi
  • Australian (AS/NZS): AS 1444-2007 Grade 4340
  • Swedish (SS): SS 2541 36NiCrMo16
  • Turkish (TS): TS 36NiCrMo16
  • Brazilian (NBR): NBR SAE 4340
  • South African (SABS): SABS 1431 Grade 4340
  • Mexican (NMX): NMX-B-506-C SAE 4340
  • Finnish (SFS): SFS 2541 34NiCrMo16
  • Spanish (UNE): UNE 36011 34NiCrMo16
  • Czech (ČSN): ČSN 41 5141
  • ISO: ISO 683-2 Grade 34CrNiMo6
  • MIL (Military Standard): MIL-S-8698 SAE 4340
  • Argentinian (IRAM): IRAM 6245 SAE 4340
  • Polish (PN): PN 34HNM
  • Norwegian (NS): NS 2541 34NiCrMo6
  • Romanian (STAS): STAS 42NiCrMo6
  • Belgian (NBN): NBN 34CrNiMo6
  • Dutch (NEN): NEN 34NiCrMo6
  • Austrian (ÖNORM): ÖNORM 34NiCrMo6
  • Indonesian (SNI): SNI 34NiCrMo6
  • Singapore (SS): SS 2541 34NiCrMo6
  • Malaysian (MS): MS 2541 34NiCrMo6
  • Philippines (PNS): PNS 34NiCrMo6
  • Thai (TIS): TIS 34NiCrMo6
  • Pakistani (PS): PS 2541 34NiCrMo6
  • Hungarian (MSZ): MSZ 2541 34NiCrMo6
  • Bulgarian (BDS): BDS 34NiCrMo6
  • Ukrainian (DSTU): DSTU 34NiCrMo6
  • Egyptian (ES): ES 34NiCrMo6
  • Vietnamese (TCVN): TCVN 34NiCrMo6
  • Iranian (ISIRI): ISIRI 40Ni2Cr1Mo28
  • Saudi Arabian (SASO): SASO 34NiCrMo6
  • New Zealand (NZS): NZS 34NiCrMo6
  • Swiss (SN): SN 34NiCrMo6
  • Greek (ELOT): ELOT 34NiCrMo6
  • Portuguese (NP): NP EN 34NiCrMo6
  • Icelandic (IST): IST 34NiCrMo6
  • Taiwan (CNS): CNS SNCM439
  • Colombian (NTC): NTC SAE 4340
  • Chilean (NCh): NCh 34NiCrMo6

Additional information

Size / Dia

16 mm, 18 mm, 20 mm, 22 mm, 24 mm, 25 mm, 26 mm, 28 mm, 30 mm, 32 mm, 33.5 mm, 36 mm, 38 mm, 40 mm, 42 mm, 45 mm, 46.5 mm, 48 mm, 50 mm, 52 mm, 53 mm, 56 mm, 58 mm, 60 mm, 63 mm, 65 mm, 66 mm, 67 mm, 68 mm, 70 mm, 71 mm, 75 mm, 77 mm, 80 mm, 85 mm, 90 mm, 95 mm, 100 mm, 105 mm, 110 mm, 115 mm, 120 mm, 125 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, 180 mm, 190 mm, 200 mm

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