Stainless Steel 333
| Chemical Analysis | |
|---|---|
| C | Carbon 0.08max |
| 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 2.50/4.00 |
| 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
Applications
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.
Forging
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
Annealing
This grade should be annealed at 2000/2150ºF (1090/1175ºC) and cooled as rapidly as possible.
Machinability
The grade machines at about 25 percent the speed of grade B1112. Low speeds and heavy feeds are essential in machining this material.
Weldability
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.
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