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100%PMI on bolting
±0.01 mmon the marked dimensions
3.1 / 3.2certificate grades
Heatlevel traceability
The chain
| Stage | What happens |
|---|---|
| 1. Melt | Chemistry verified, heat number issued |
| 2. Form | Forging, rolling or drawing — number carried on the tag |
| 3. Heat treat | Solution anneal and age, recorded per run |
| 4. Test | Volume, surface, mechanical and chemical, per the order |
| 5. Mark | Number on the part where the drawing allows, on the tag always |
| 6. Certify | One certificate, one heat number, measured values |
Inspection matrix by product
| Product | On every piece or length | Per lot | Document |
|---|---|---|---|
| Forgings and rings | UT, PT, dimensional | Tensile, hardness, composition, grain size | 3.1 / 3.2 + NDT |
| Bar and billet | UT, dimensional | Tensile, hardness, composition | 3.1 |
| Spring wire | Diameter in-line, surface | Tensile, elongation, relaxation on request | 3.1 |
| Bolting | PMI on 100%, dimensional | Hardness, tensile, proof load | 3.1 / 3.2 + PMI |
| Nickel mesh | Mesh count, wire diameter, open area | Purity, tensile | 3.1 |
| Monel plate | Thickness, flatness | Tensile, hardness, PMI, NACE on request | 3.1 / 3.2 |
Documents you can ask for
- EN 10204 3.1, carrying the heat number and the measured values.
- EN 10204 3.2, where a third party witnesses — booked before the test, not after.
- Separate NDT report at the class named on the order.
- Dimensional report on the dimensions the drawing marks.
- NACE MR0175 / ISO 15156 where the service requires it.
When a lot misses the specification
Declared before delivery, or not shipped.
A part outside the tolerance is either reworked and re-inspected, or the deviation is put in front of the buyer before it leaves. Shipping it and hoping the inspection does not happen is the one option that is not available.