314 Stainless Steel - 1.4841 - X15CrNiSi25-21 - ~SUH 310
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314 Stainless Steel Standard values
Working hardness:
approx. 223 BHN
Delivery condition:
max. 223HB
Chemical composition in %
0.000000
00.200000
0.21.500000
1.52.500000
2.50.000000
02.000000
20.000000
00.045000
0.0450.000000
00.015000
0.01524.000000
2426.000000
2619.000000
1922.000000
220.000000
00.110000
0.11314 Stainless Steel Technical Data
314 Stainless Steel Technical Properties
Heat-resistant, austenitic chromium-nickel steel, that provides good resistance to oxidation at high temperatures. Good resistance properties as well as excellent chemical resistance at high temperatures up to 2012°F. Very good corrosion resistance.
314 Stainless Steel Applications
apparatus engineering for high temperature application, automotive industry, chemical industry, oil industry, chains for the cement and concrete industry, mechanical engineering, furnace construction, annealing muffles, enamel grates, fire baskets, heat conductors
314 General Information
314 is an austenitic, heat resistant stainless steel. The addition of silicon in 314 stainless makes this steel grade more resistant to oxidation and prevents carburization at elevated temperatures. On the other hand, continuous use at a temperature range of 1202-1652°F (650-900°C) makes this stainless steel more susceptible to phase changes and embrittlement. This material grade is suitable for cold forming and cold heading, hammer- and die forging and is not magnetizable.
Heat resistance
314 is a heat resistant stainless steel with good oxidation and excellent chemical resistance at temperatures of up to 2012°F (1100°C). However, the corrosion resistance of this heat resistant steel is restricted in certain atmospheres (please see corrosion resistance).
Heat treatment
Solution annealing
Heat the work pieces uniformly to a temperature of 1922-2102°F (1050-1150°C) and then quench the parts in water or cool rapidly in air.
Hardening
This steel grade can only be hardened by cold working it.
Quenching media
- Water
- Air
Hot working
Heat the work piece slowly and uniformly to a temperature range of 1742-2192°F (1200-950°C) and carry out the hot work. Do not let the temperature drop below 1832°F (1000°C) and use an annealing treatment after hot forming, especially if the temperature dropped below 1832°F during hot working the material.
Cold working
Due to its austenitic structure, which makes the material more ductile, 314 stainless steels can be easily cold worked. Parts that have been exposed to high temperatures (1202-1652°F (650-900°C)) over a long time are not recommended to be cold worked as the material becomes susceptible to intergranular carbide precipitation as well as intermetallic phase precipitation.
Corrosion resistance
Intergranular corrosion
With the addition of carbon, this alloy is sensitive to intergranular corrosion after sensitization. Though this stainless steel contains 25% of chromium, which improves corrosion resistance, this alloy is not suitable to be used in wet environments.
Atmospheric corrosion
Above 1202°F (650°C), there already is a limited corrosion resistance to reducing or oxidizing gases with a sulphur content.
Above 1652°F (900°C), 314 has only limited corrosion resistance to carburizing gases or low-oxygen gases with nitrogen content.
Machinability
The formation of carbides, in 314, increases the wear of cutting tools. Due to severe work hardening and poor thermal conductivity, adequate cooling and high quality tooling is required. 314 stainless steels should be machined at a low cutting speed with shallow cutting depths.
Forging
Heat the parts up to a temperature range of 2147-1832°F (1175-1000°C) and finish the process by rapidly cooling the pieces in water or air.
Welding
As austenitic steels in comparison to unalloyed steels only have a 30% thermal conductivity and a lower fusion point, austenitic steels should be welded with a lower heat input than unalloyed steels. To avoid burn through or overheating of thinner parts it is recommended to apply a higher welding speed. 314 stainless steels have a much higher coefficient of thermal expansion than unalloyed steels. Combined with poorer thermal conductivity greater distortion is to be expected.
Disclaimer
The data shown here has been compiled with the greatest diligence and is regularly updated with regard to the correctness and completeness of its content. The content is indicative only and should not be taken as a warranty of specific properties of the product described or a warranty of suitability for a particular purpose. All information presented is given in good faith and no liability will be accepted for actions taken by third parties in reliance on this information. ABRAMS Industries reserves the right to change or amend the information given here in full or parts without prior notice.