Description

347 stainless steel is a high-strength, corrosion-resistant steel known for its excellent resistance to intergranular corrosion. It contains niobium, which provides enhanced stability against sensitization during welding or high-temperature service.

Applications

347 stainless steel is widely used in various applications where excellent resistance to corrosion and high temperatures is required. It is commonly used in the manufacturing of aircraft exhaust systems, chemical processing equipment, food processing equipment, and boiler components.

Blacksmith Applications

For blacksmiths, 347 stainless steel can be used to create high-quality tools like punches, chisels, tongs, and hammers. Its corrosion resistance and high-temperature stability make it suitable for forging applications that involve exposure to harsh environments.

347 Stainless Steel Forging Temperature

Forging should be performed between 2100°F - 2300°F (1149°C - 1260°C), followed by air cooling or rapid quenching in water or oil.

347 Stainless Steel Heat Treatment

347 Stainless Steel Annealing Temperature

Annealing is typically carried out at a temperature range of 1800°F - 2000°F (982°C - 1093°C) for a sufficient period of time, followed by slow cooling in the furnace to relieve stresses and improve ductility.

347 Stainless Steel Normalizing Temperature

Normalizing can be done by heating the steel to a temperature of 1700°F - 1850°F (927°C - 1010°C) and holding it at that temperature for a suitable soak time, followed by air cooling.

347 Stainless Steel Hardening Temperature

Hardening of 347 stainless steel is achieved by heating the steel to a temperature range of 1800°F - 2000°F (982°C - 1093°C) and then rapidly quenching in water, oil, or air.

347 Stainless Steel Tempering Temperature

Tempering should be carried out between 1100°F - 1600°F (593°C - 871°C) to achieve the desired combination of hardness, strength, and toughness.

Machinability

347 stainless steel has a machinability rating of 45, indicating fair machinability. It requires slower speeds, rigid tooling setups, and adequate cooling to avoid work hardening.

Weldability

347 stainless steel exhibits good weldability. It can be welded using common methods such as gas tungsten arc welding (GTAW), gas metal arc welding (GMAW), and shielded metal arc welding (SMAW). Proper preheating and post-weld heat treatment are typically recommended to minimize the risk of sensitization and preserve corrosion resistance.