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). Find out more email us with your quality Alloy 4130 metal powder requirements: powders@aircraftmaterials.com

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

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Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.