Alloy Information Report for Stainless Steel 314

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General Characteristics of Stainless 314

The best high-temperature resistance capabilities of any chromium-nickel steels can be found in Stainless 314. Silicon improves oxidation and carburization resistance, but may make more brittle when subjected to lengthy temperatures of 1200° to 1500°F (649° to 816°C).

Chemical Composition of Stainless 314

• Carbon 0.25 max
• Manganese 2.00 max
• Silicon 1.50-3.00
• Phosphorus 0.045 max
• Sulfur 0.03 max
• Chromium 23.0-26.0
• Nickel 19.0-22.0
• Iron balance

Heat Treatment of Stainless 314

• Anneal by heating to 1900° to 2100°F (1038° to 1149°C), then water quench or rapidly air cool
• Harden only through cold work; thermal treatment ineffective

Applications of Stainless 314

• Equipment for furnaces
• Annealing and carburizing boxes
• Radiant tubes
• Heat treatment components

Machinability of Stainless 314

• Can tear easily
• Generous coolant recommended
• May work-harden
• High-speed turning tools: 45-80 sfpm, feeds of 0.003-0.008/rev
• Carbide-tipped tools: 200-500 sfpm
• Mix sulfurized cutting oil with paraffin oil

Workability of Stainless 314

• Forge, flange or work after gradually heating to 1600°F (871°C), thoroughly soaking and quickly heating to 2000° to 2250°F (1093° to 1232°C)
• Flange only above or below 1300° and 1800°F (704° and 982°C), and avoid working at those temperatures

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