314 Stainless Steel (1.4841)

314 stainless steel is built for mechanical stability in prolonged high-heat exposure, particularly in structural and load-bearing applications inside furnaces or chemical plants.

Tensile Strength: 515–655 MPa (75,000–95,000 psi) - Suitable for components subject to thermal expansion and contraction under stress.

Yield Strength (0.2%): 205–310 MPa (30,000–45,000 psi) - Helps retain form and performance under constant mechanical load.

Elongation: 40% - Offers good ductility, allowing some movement without fracture during thermal cycling.

Hardness (Brinell): 217 HB - Balances wear resistance with machinability in harsh environments.

These characteristics support 314's use in heat exchangers, radiant tubes, and load-bearing supports in high-temperature assemblies.

These physical traits define 314’s ability to retain integrity during prolonged heat exposure or thermal cycling:

Density: 8.0 g/cm³ - Supports use in heavy-load systems and structural assemblies.

Melting Point: 1454–1510 °C (2650–2750 °F) - Allows service in extreme heat environments without risk of softening or structural failure.

Thermal Conductivity: ~14 W/m·K - Provides steady heat transfer in radiant systems or kilns.

Thermal Expansion: ~17 × 10⁻⁶/K - Accommodates thermal cycling while minimising warping or cracking.

Modulus of Elasticity: 193 GPa (28 × 10⁶ psi) - Delivers high stiffness, critical in applications under constant load and heat.

While 314 is a distinct grade, buyers often compare it to neighbouring heat-resistant alloys for specific performance priorities:

310S (1.4845): Lower nickel content with better weldability, commonly used in high-heat structural applications.

253MA (1.4835): Silicon- and nitrogen-strengthened for excellent oxidation and creep resistance at temperatures above 1100°C.

309S (1.4833): Offers oxidation resistance at slightly lower temperatures, often used in less chemically aggressive environments.

These options provide flexibility depending on the balance of cost, mechanical strength, and resistance to oxidation or carburisation required.