Stainless Steel 333

Chemical Analysis
C Carbon
Mn Manganese
2.00 max
P Phosphorus
0.030 max
S Sulfur
0.040 max
Si Silicon
0.75 – 1.50
Cr Chromium
24.00 – 27.00
Mo Molybdenum
2.50 – 4.00
Ni Nickel
44.0 – 47.0
Co Cobalt
W Tungsten
2.50 – 4.00

General characteristics of Stainless Steel 333

Type 333 is in fact more a superalloy than a stainless steel. It shows great resistance to high temperature oxidation and carburization, as well as resistance to many vicious room temperature corrosive agents


The alloy is used in heat treating muffles, retorts and fixtures, stack dampers, rotary kilns, molten glass processing, furnace fans and shafts and carburizing furnace parts.


The alloy is forged between 2200/1800ºF (1205/980ºC.) It is essential to ensure uniform heating throughout the feed stock. Post-forge annealing will ensure optimum corrosion resistance.

Heat treatment


This grade should be annealed at 2000/2150ºF (1090/1175ºC) and cooled as rapidly as possible.


The grade machines at about 25 percent the speed of grade B1112. Low speeds and heavy feeds are essential in machining this material.


Shielded fusion and resistance methods may be used to weld 333 grade. It is important to use the correct filler metals and heat input parameters. Advice should be sought from reliable technical sources.

To Send a Request for Quote, please Click Here, call 973.276.5000, or fax (973) 276 – 5050