Smiths MRO is a sub-divsion of a larger business - Smiths Advanced Metals.
Smiths MRO focuses on raw material support for the global aircraft maintenance, repair and overhaul market. Our business is supported by a broad and diverse stock range with a dedicated team that provides outstanding service levels required for our industry.
4130 steel sheet is easy to weld and fabricate and benefits from mild hardenability.
The product is a through-hardened low alloy steel grade, offering excellent ductility, good workability and good wear/abrasion resistant characteristics. The alloy is often referred to as chrome moly (or chromoly) due to the material's chromium and molybdenum content. The impressive weldability of the alloy is at the expense of through thickness strength. The product combines reasonable strength, toughness and fatigue strength. Good atmospheric corrosion resistance is also a feature.
4130 steel sheet is popular in aerospace engineering applications providing good strength with superior abrasion-resistant qualities. Typical engineering applications include bearings, valves, hydraulics and engine mounts. Our product is popular in commercial and military aerospace applications and is ideal for fusion welded parts.
In sheet form, 4130 steel is produced to the AMS 6345 specification in the normalised condition and AMS 6350 in the annealed condition. Specification MIL/AMS-S-18729 also covers both of these conditions. The normalised condition material made to AMS 6345 is slightly harder.
Smiths MRO stock 4130 steel in all standard thicknesses from 0.025" up to 0.125" thickness in large sheets and also cut to size pieces. We also offer in-house processing with a dedicated guillotining service where we cut your sheets to specific sizes to suit your engineering requirements.
AMS 6345
AMS 6350
MIL/AMS-S-18729
Fusion welded parts
Engine seats
Valves
Bearings
Excellent ductility
Good workability
Good abrasion resistance
Impressive weldability
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