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4130 (AMS 6345/ AMS 6346 / AMS 6350)- Chrome-Moly Aircraft Steel
Technical Data Sheet
Alloy 4130 (AISI 4130) is a chromium molybdenum alloy steel being a widely used Aircraft Steel due to its weldability, ease of fabrication and mild hardenability. The hardenability and weldability of Alloy 4130 are considered equivalent to 8630 (MIL-S-6250) . Alloy 4130 is also vacuum degassed to meet the magnetic particle inspection standards of AMS 2301.
Applications of 4130 Chrome- Moly Aircraft Steel :
Automotive
Military / Commercial Aircraft
Machine Tools
Components
Motorsports
Aerospace
Oil and Gas industry
| Chemical Composition Limits | |||||||||
| Weight% | C | Mn | P | S | Si | Cr | Ni | Mo | Cu |
| 4130 Bar/Tube | 0.28 - 0.33 | 0.40-0.60 | 0.025 max | 0.025 max | 0.15 - 0.35 | 0.80-1.10 | 0.25 max | 0.15-0.25 | 0.35 |
| 4130 Sheet/Plate | 0.28 - 0.33 | 0.40 - 0.60 | 0.025 max | 0.025 max | 0.20-0.35 | 0.80-1.10 | - | 0.15 - 0.25 | - |
Typical Mechanical Properties
| Alloy | Condition | Thickness | Tensile Strength ksi | Yield Strength ksi | Elongation | Hardness |
| Tube AMS 6371 | Cold Drawn | - | 95 | 70 | 12 | <25 |
| Bar AMS 6370 | Annealed | - | - | - | - | 29HB Max |
| Bar AMS 6346 | Hardened & Tempered | - | 125 | 100 | 17 | - |
| Sheet AMS 6350 | Annealed | - | - | - | - | <25 HRC |
| Sheet AMS 6345 | Normalised | <0.062" | 95 | 75 | 8 | - |
| Sheet AMS 6345 | Normalised | 0.062" - 0.125" | 95 | 75 | 10 | - |
| Sheet AMS 6345 | Normalised | 0.125" - 0.187" | 95 | 75 | 12 | - |
| Sheet AMS 6345 | Normalised | 0.187" - 0.250" | 90 | 70 | 15 | - |
| Sheet AMS 6345 | Normalised | 0.250" - 0.750" | 90 | 70 | 16 | - |
| Sheet AMS 6345 | Normalised | 0.750" - 1.500" | 90 | 70 | 18 | - |
| Sheet AMS 6345 | Normalised & Heat Treated | 0.249" - 0.375" | - | - | - | 42 |
| Sheet AMS 6345 | Normalised & Heat Treated | 0.375" - 0.500" | - | - | - | 38 |
| Sheet AMS 6345 | Normalised & Heat Treated | 0.500" - 0.625" | - | - | - | 32 |
| Sheet AMS 6345 | Normalised & Heat Treated | 0.625" - 0.750" | - | - | - | 29 |
| Sheet AMS 6345 | Normalised & Heat Treated | 0.750" - 0.875" | - | - | - | 27 |
| Sheet AMS 6345 | Normalised & Heat Treated | 0.875" - 1.500" | - | - | - | 26 |
Availability
Alloy 4130 (AISI 4130) is available in Sheet, Tube, Plates, Powder, Rods, Bars (Squares, Rounds, Hexagons, Flats) and Welding Wire. For all stock availability contact Sales.
NEW - Aircraft Materials now offers a comprehensive range of high-quality Alloy 4130 metal powders, produced and tested to exacting standards for use in all processes including Additive Manufacturing (AM), Near-Net Shape Powder Metallurgy (NNS/PS) and Hot-Isostatic Pressing (HIP).
Specifications
AMS 6345 Sheet / Plate, Normalised
AMS 6346 Bar Hardened & Tempered
AMS 6350 Sheet / Plate
AMS 6351 Sheet / Plate, spheroidised
AMS 6370 Bar
AMS 6371 Tube
MIL-S-6758
MIL-S-18729
MIL-T-67366
AISI 4130
ASTM A322
ASTM A331
S534
S535
UNS G41300
