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

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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