Solution annealing is used mainly for austenitic and duplex stainless steels to dissolve unwanted precipitates and support the required microstructure and corrosion performance. The exact cycle depends on alloy, section size, product standard and fabrication history.
| Wording | Risk | Better requirement |
|---|---|---|
| “Annealed” | Condition and acceptance are unclear. | Reference the exact product standard and delivery condition. |
| “Solution annealed” only | No proof or final property requirement. | Add heat-treatment records, mechanical properties and applicable corrosion tests. |
| “Heat treated to standard” | Edition and supplementary options are unclear. | Name the standard, edition and ordered options. |
| Product | Questions |
|---|---|
| Sheet/plate | Finish, flatness, pickling/passivation and cut edges. |
| Bar/forging | Section, allowance, hardness, test location and UT. |
| Pipe/tube | Welded or seamless, final heat treatment, surface and NDT. |
| Fabrication | Whether treatment is before or after welding and forming. |
No. Solution annealing changes bulk microstructure; pickling and passivation address surface condition.
An MTR states condition and results, but buyers needing process evidence should request traceable heat-treatment records.
Send grade, form, dimensions, standard, final condition and certification requirements.
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