Three finished wear-part classes within one qualification and traceability system. Selection starts with wear mechanism, impact, geometry and processing.
| Product class | Nominal class | Surface hardness by thickness interval | Specification scope |
|---|---|---|---|
| GOREX 400Open dossier | 400 HBW | ≤ 80 mm: 370—430 HBW; > 80—120 mm: 360—440 HBW | through 120 mm |
| GOREX 450Open dossier | 450 HBW | ≤ 80 mm: 420—480 HBW; > 80—120 mm: 410—480 HBW | through 120 mm |
| GOREX 500Open dossier | 500 HBW | ≤ 70 mm: 470—540 HBW; > 70—100 mm: 450—540 HBW | through 100 mm |
Pre-commercial technical overview. Thickness, dimensions, mechanical values, chemistry and inspection scope are confirmed for each request and documented for the shipment.
Balanced abrasion resistance and impact tolerance with broad fabrication margin. Final selection always remains application-specific.
Higher nominal hardness with the retained E-grade impact framework, for rising abrasion intensity where structural and fabrication demands remain material.
The launch programme's highest nominal hardness, for use where wear pressure justifies tighter fabrication and design control.
The same engineering measures, the same scales and explicit claim boundaries. These charts visualise the contracted NM400E, NM450E and NM500E framework behind the GOREX grades.
Specified range in the first thickness band. The range moves upward with the grade; it is not a wear-life multiplier.
Comparable first-band values reveal the trade-off: strength and hardness rise while elongation and fabrication margin tighten.
Under the cited HBIS/Tangsteel test conditions, the tested NM500 steel recorded 8.3 times the wear resistance of the Q355B baseline. Test method, abrasive, impact and hardness control the outcome; this ratio must not be applied as a universal service-life forecast.
Indicative| Grade | Source framework | Surface hardness | Rm min. | A50 min. | KV2 min. | Max. thickness | CEV max. |
|---|---|---|---|---|---|---|---|
| GOREX 400 | NM400E | 370–430 HBW / ≤ 80 mm | ≥ 1200 MPa | ≥ 10% | ≥ 24 J / -40 °C / ≤ 80 mm | ≤ 120 mm | ≤ 0.57% / ≤ 50 mm |
| GOREX 450 | NM450E | 420–480 HBW / ≤ 80 mm | ≥ 1250 MPa | ≥ 8% | ≥ 24 J / -40 °C / ≤ 80 mm | ≤ 120 mm | ≤ 0.59% / ≤ 50 mm |
| GOREX 500 | NM500E | 470–540 HBW / ≤ 70 mm | ≥ 1350 MPa | ≥ 7% | ≥ 21 J / -40 °C / ≤ 60 mm | ≤ 100 mm | ≤ 0.64% / ≤ 50 mm |
| Units: HBW / MPa / % / J / °C / mmSource: GB/T 24186-2022 + GOREX qualification overlayRevision: GX-PP-0.9Indicative | |||||||
Framework values are used only when contracted and confirmed for the order. Shipment conformity is established by the original mill EN 10204 3.1 document and GOREX release controls.
Higher nominal hardness is not a universally better selection. Record material flow and abrasion first, then impact, load-bearing geometry, cutting, bending, welding and future repair. Finally, confirm the chosen class against the order's actual thickness and chemistry.