SAE 4145H Steel

SAE 4145H Steel Suppliers . AISI 4145 steel suppliers delivering to the whole of the UK. AISI 4145 is a chromium molybdenum alloy steel grade widely used in the oil and gas sectors. Similar to AISI 4140 but with a higher carbon content. 4145 is more popular in larger diameters due to its increased strength and hardenability. AISI 4145 is commonly supplied quenched and tempered with a hardness of between 30 - 36HRc.