4145

4145 is a grade of steel that was developed primarily by the energy industry for the manufacture of down-hole drilling tools (i.e. drill collars).  Sunbelt Steel carries this grade extensively in the H MOD Q&T condition.  The "MOD" stands for a modification of the molybdenum and manganese alloy content that yields superior strength and toughness after heat treatment.  These higher mechanical properties make 4145 a great choice for a wide variety of industries and applications (i.e. gears, shafts for large hydraulic presses, and rolls for paper mills).

The 4145 we carry is available in lengths up to 40' in the Quenched & Tempered condition, usually to a hardness range of 285-341 BHN.  Longer lengths or material in the Hot Rolled/As Rolled condition are available upon request. 

Sunbelt Steel carries an inventory of 4145H Mod Q&T solid bar in sizes ranging from 2-7/8" to 20" OD.  Other ODs, both larger and smaller, are available upon request.  In addition to solid bar, an extensive inventory of heavy-wall trepanned bar is available for immediate delivery.  Generally, Sunbelt Steel has drilled inventory in OD sizes from 2-7/8" to 11" and ID's ranging from 1" to 4-3/4".

Contact a member of our sales team with any of your 4145 questions or needs.