Type 18 SR Stainless Steel provides excellent resistance to high-temperature scaling. 18SR is readily welded by conventional methods. It is not subject to embrittlement or loss of corrosion resistance in the heat-affected zones that affects many other straight chromium alloys. This alloy is especially valuable for applications requiring high-temperature scaling resistance superior to Types 409, 430 and 304 stainless steels and for those applications where Types 442 and 446 give only marginal protection.

Product Forms:

Sheet, Strip

Typical Applications:

Industrial ovens, blowers, exhaust systems, furnace equipment, heaters, induction furnaces and furnace tubes, annealing boxes, baffle plates, heat exchangers, resistor grids, kiln liners and pyrometer tubes.

Chemical Composition: (Typical)

Element Type 18SR
Carbon 0.015
Manganese 0.30
Chromium 17.30
Nickel 0.25
Titanium 0.25
Aluminum 1.7

Mechanical Properties: (Typical)

Type Yield Strength 0.2% offset (KSI) Tensile Strength (KSI) % Elongation (2″ Gauge length)
18 SR 56 78 30


18 SR Stainless Steel provides corrosion resistance comparable to other ferritic 18% Cr stainless alloys and approaches Type 304 in many aqueous media.

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