MATERIALS-STUDBOLTS/HEX NUTS UNS S31254-A182 F44
A182 F44 is a 6% Mo Super Austenitic stainless steel. The material combines moderately good mechanical strength and high ductility with excellent corrosion resistance in a variety of environments.
This material is generally supplied in the annealed condition giving yield strengths in excess of 44 KSI (300Mpa),
this material cannot be hardened by heat treatment but stronger surface strengths can be achieved by cold working.
Forging temperature for this material should be 1100 – 1250oC
Reheat as often as necessary and cool in still air.
Material in the annealed condition is readily machinable by all conventional methods.
Welding A182 F44 is readily weldable using many of the standard electric arc welding processes but oxyacetylene welding is not recommended because carbon pickup in the weld metal may occur.
Anneal – Heat to 1150 – 1210oC ensuring sufficient time is allowed for the centre to achieve furnace temperature and hold for a time commensurate with the ruling section, followed by water quenching.
Typical Chemical composition
Carbon 0.02% Max
Silicon 0.80% Max
Manganese 1.00% Max
Phosphorous 0.030% Max
Sulphur 0.010% Max
Chromium 19.5 – 20.5%
Nickel 17.5 – 18.5%
Molybdenum 6.0 – 6.5%
Nitrogen 0.18 – 0.22%
Copper 0.50 – 1.00%