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18 SR Stainless Steel
Description:
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) | Hardness Rockwell |
|---|---|---|---|---|
| 18 SR | 56 | 78 | 30 | HRB 84 |
Corrosion:
18 SR Stainless Steel provides corrosion resistance comparable to other ferritic 18% Cr stainless alloys and approaches Type 304 in many aqueous media.
