Stainless Steel - Grade 310S (UNS S31008, DIN 1.4845)

Description

Stainless steel 310S (UNS S31008, DIN 1.4845) is an austenitic chromium-nickel alloy with excellent resistance to oxidation and scaling at high temperatures up to 1150°C (2100°F). It has a low carbon content for improved weldability and formability compared to standard 310 grade.

Chemical Composition

Element	Composition
Chromium (Cr)	24.0 - 26.0
Nickel (Ni)	19.0 - 22.0
Carbon (C)	≤ 0.08
Silicon (Si)	≤ 1.50
Manganese (Mn)	≤ 2.00
Phosphorus (P)	≤ 0.045
Sulfur (S)	≤ 0.030
Iron (Fe)	Balance

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Mechanical Properties (Annealed)

Property	Value
Tensile Strength (MPa)	≥ 515
0.2% Proof Strength (MPa)	≥ 205
Elongation (%)	≥ 40
Hardness (HB)	≤ 217

Thermal & Physical Properties

Excellent oxidation resistance up to 1150°C (2100°F)
High creep strength at elevated temperatures
Resistant to spalling and thermal cycling
Good sulfidation resistance
Non-magnetic in annealed and cold worked conditions

Other Designations

ASTM: A240, A276, A312
UNS: S31008
DIN: 1.4845
JIS: SUS310S
GB: 06Cr25Ni20

Fabrication and Heat Treatment

Can be readily fabricated by standard commercial procedures
Welding processes: TIG, MIG, arc welding, laser beam welding
Solution annealing temperature: 1030-1180°C (1886-2156°F)

Applications

Heat treatment equipment (furnace parts, conveyor belts, rollers, oven linings)
Chemical processing equipment (vessels, piping, valves)
Food processing equipment
Aerospace and cryogenic applications
Power generation (boilers, turbines, nuclear plants)

Supplied Forms

Bars
Wires
Weld wire (AWS E310-16 or ER310)

Features

Excellent oxidation resistance at high temperatures
Good corrosion resistance
Resistant to scaling and spalling
Suitable for moderately carburizing atmospheres
Improved weldability and formability compared to 310/1.4845 grade

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