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Chrome-Moly Aircraft Steel 4130 (AMS 6345/ AMS 6346 / AMS 6350)


Technical Data Sheet

 

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 -

Alloy 4130 (AISI 4130) is a chromium molybdenum alloy steel. Alloy 4130 is 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.

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, Rods, Bars (Squares, Rounds, Hexagons, Flats) and Welding Wire.  For all stock availability contact Sales.

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
  
Services
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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.

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