GENERAL SCOPE

4340 is a low alloy steel that is used in downhole tools and hangers that require very high tensile strength with excellent impact resistance.

TM Steels can provide all materials produced to bespoke customer requirements. We project manage your raw material or semi finished material requirements, including Sawing,  Heat Treatment, Testing, Rough Machining, Hardness Testing, Ultrasonic Examination and certification, including BS EN 10204 3.1 & BS EN 10204 3.1 Witness documentation packages. We use an approved list of European Mills, and can offer material with PED / REACH & ROHS approval & UKAS accredited Testing. Contact our sales team today if you would like to enquire about our AISI4340 Stock Lines.

uses INCLUDE: Heavy Shafting, fasteners, Aircraft, Automotive, Hydraulic systems, gears, axles, spindles, drilling tools, wellhead, marine propulsion

CHEMICAL COMPOSITION

MECHANICAL PROPERTIES

SURFACE CONDITION                               

Peeled Bar.

REDUCTION RATIO                                      

4:1 Min

STRUCTURE                                                  

Grain size will be ASTM 5 or finer.

ULTRASONIC EXAMINATION                 

Ultrasonic examination available per ASTM A388/API6A Latest Edition or to bespoke customer specification.

STOCK RANGE         

Rolled / Peeled Bar                                  

Normalised, quenched and tempered.                                           

50.8mm –265mm ⌀

Forged Annealed Bar                               

Annealed condition suitable for further heat treatment.     

270mm – 609.6mm ⌀

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