314 Stainless Steel Wire
314 stainless steel (UNS S31400) is an austenitic heat-resistant steel renowned for its exceptional high-temperature oxidation resistance and creep strength. Enhanced by high chromium (Cr), nickel (Ni), and silicon (Si) content, it excels in extreme thermal environments such as furnace components and chemical processing equipment.
Heat-Resistant Steel 314 (S31400): Properties, International Grades & Performance Comparison
Material Overview
314 stainless steel (UNS S31400) is an austenitic heat-resistant steel renowned for its exceptional high-temperature oxidation resistance and creep strength. Enhanced by high chromium (Cr), nickel (Ni), and silicon (Si) content, it excels in extreme thermal environments such as furnace components and chemical processing equipment.
Chemical Composition & Properties
|
Element |
Content Range (%) |
Key Role |
|
Chromium |
23.0-26.0 |
Oxidation & corrosion resistance |
|
Nickel |
19.0-22.0 |
High-temperature strength |
|
Silicon |
1.5-3.0 |
Scale resistance at high temps |
|
Carbon |
≤0.25 |
Controls carbide precipitation |
|
Mechanical Properties (Solution-Treated): |
|
|
Tensile Strength |
≥520 MPa |
|
Yield Strength |
≥205 MPa |
|
Elongation |
≥30% |
|
Hardness |
≤187 HB |
High-Temperature Advantages
Max Service Temp
1200°C (intermittent), 1150°C (continuous)
Oxidation Resistance
Superior to 310S, especially in sulfur-rich environments
Creep Resistance
Ideal for pressure-bearing parts (e.g., boiler hangers)
Performance vs. Similar Grades
|
Property |
314 (S31400) |
310S (0Cr25Ni20) |
330 (N08330) |
|
Max Temp |
1200°C |
1150°C |
1100°C |
|
Oxidation |
Excellent (high Cr/Si) |
Good |
Moderate |
|
Carburization |
Good |
Moderate |
Excellent (key focus) |
|
Ductility |
Moderate (avoid 600-800°C) |
Good |
Moderate |
Key Applications
Industrial Furnaces
Tubes, combustion chambers, nozzles
01
Chemical Processing
High-temperature reactors, heat exchangers
02
Energy Sector
Boiler components, nuclear power parts
03
Manufacturing
Heat treatment fixtures, enamel furnaces
04
Processing Guidelines
Solution Treatment
1050-1150°C water/air cooling
Hot Working
1150-800°C, avoid prolonged exposure below 800°C
Welding
Use compatible filler metals and control interpass temperature
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International Grade Equivalents
|
China |
GB 16Cr25Ni20Si2 / 1Cr25Ni20Si2 / S38304 |
|
|
USA |
ASTM S31400 / AISI 314 |
|
|
Germany |
DIN 1.4841 |
|
|
Europe |
EN X15CrNiSi25-21 |
|
|
Japan |
JIS SUS314 |
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