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Testing
Chemistry, mechanical properties and thickness, with NACE on request.
| Test | Method | Establishes | Where |
|---|---|---|---|
| PMI | On request, per piece or per lot | The grade is what it says | Report |
| Tensile | ASTM E8 | Yield, tensile, elongation | Certificate |
| Hardness | Per grade | Condition response, especially K-500 age | Certificate |
| Thickness | Measured | Against ASTM B127 tolerance | Certificate |
| NACE | MR0175 / ISO 15156 | Sour service suitability | Certificate, on request |
NACE has to be asked for
Sour-service certification is a condition of supply, not a property of the plate. It is stated at enquiry and carried on the certificate; a plate supplied without it is not sour-service certified even if the grade is right.