The corresponding grade of ASTM A240 UNS N08020 is NAS 335X. ASTM A240 UNS N08020 Stabilizing heat treatment range from 925 to 1010°C.
Workability for ASTM A240 UNS N08020 steel
The hot workability and cold workability of ASTM A240 UNS N08020 steel is basically the same as those of standard austenitic stainless steels.
Weldability for ASTM A240 UNS N08020 steel
TIG welding, MIG welding, and shielded metal arc welding are applicable in the same manner as with standard austenitic stainless steels.
However, because ASTM A240 UNS N08020 steel is an Nb-added stainless steel, the welding heat input should be reduced as far as possible. ER320 or ER320LR welding electrodes are recommended.
Pickling for ASTM A240 UNS N08020 steel
Pickling is performed under the same conditions as with Type 304, using a mixture acid of nitric acid and hydrofluoric acid.
Machinability for ASTM A240 UNS N08020 steel
The machinability of ASTM A240 UNS N08020 steel is basically the same as that of standard austenitic stainless steels. In machining, a high speed steel tool or ultrahard tool should be used. It is also advisable to use a slower feed rate and deeper cutting depth.
Applications for ASTM A240 UNS N08020 steel
Sulfuric acid plants, chemical and petrochemical plants. agricultural products, fans, tanks, agitators, pickling racks, tubing caps pharmaceutical, heat exchangers ect.
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