Steel XAR 500 QT-TUF
Heat-treated state
GB NM500
Choose when the 500 HB wear class must also survive impact/cold service — tighter chemistry and cleanliness give guaranteed CVN at −40 °C.
Values for the QT-TUF condition
Other XAR 500 tempers and conditions
XAR 500 is listed in 3 conditions; see the grade overview at XAR 500.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Chinese GB/T 24186 wear plate equivalent | Choose when cost and stock availability outweigh certified toughness and flatness; hardness stays at 500 HB (50 HRC) but elongation is only 8% and machinability score 12. | 1,250 | 1,650 | 8 | 50 HRC | 7.8 % IACS |
QTDefault Quenched and tempered | Standard mill-delivered condition for XAR 500 plate, 4–65 mm; pick for severe sliding abrasion where impact loading is moderate. | 1,300 | 1,700 | 8 | 50 HRC | — |
QT-TUFThis page 500 HB with guaranteed low-temperature impact toughness | Choose when the 500 HB wear class must also survive impact/cold service — tighter chemistry and cleanliness give guaranteed CVN at −40 °C. | 1,350 | 1,650 | 9 | 50 HRC | 7.8 % IACS |
What is XAR 500 QT-TUF?
XAR 500 QT-TUF is XAR 500 heat treated to QT-TUF — choose when the 500 HB wear class must also survive impact/cold service — tighter chemistry and cleanliness give guaranteed CVN at −40 °C. XAR 500 QT-TUF has a yield strength of 1,350 MPa (196 ksi) and a tensile strength of 1,650 MPa (239 ksi) — stronger than 95% of steel grades. Elongation at break is 9% and the elastic modulus is 210 GPa (30.5 Msi). XAR 500 QT-TUF has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F). QT is the default condition FabDigit quotes; QT-TUF is available on request or by drawing note.
Advantages
- High strength — 1,350 MPa (196 ksi), better than 95% of steel grades
Limitations
- Difficult to machine — 12/100, worse than 99% of steel grades
- Limited ductility — 9%, worse than 93% of steel grades
- Limited service temperature — 250°C (482 °F), worse than 85% of steel grades
- Poor heat conductor — 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 80% of steel grades
XAR 500 QT-TUF properties
Typical room-temperature values for XAR 500 QT-TUF; 23 are specific to this condition. Other listed values are XAR 500 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
XAR 500 QT-TUF has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,420°C (2,588 °F).
Mechanical16
XAR 500 QT-TUF has a yield strength of 1,350 MPa (196 ksi) and a tensile strength of 1,650 MPa (239 ksi) — stronger than 95% of steel grades. Elongation at break is 9% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
XAR 500 QT-TUF is rated for continuous service to 250°C (482 °F). It conducts heat at 33 W/m·K (19.1 BTU/hr·ft·°F), worse than 80% of steel grades. Thermal expansion is 12 µm/m·K (6.67 µin/in·°F).
Electrical3
XAR 500 QT-TUF conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is not recommended (12/100), worse than 53% of steel grades.
Sustainability4
Producing a kilogram of XAR 500 QT-TUF takes about 30 MJ of energy and emits 2.4 kg of CO₂ — more than 56% of steel grades. Typical recycled content is 25%.
Manufacturability6
XAR 500 QT-TUF's machinability is not recommended (12/100, worse than 99% of steel grades); weldability fair (48/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with XAR 500 QT-TUF
Is XAR 500 easy to machine?
Treat as ~50 HRC hardened steel: rigid setup, negative-rake carbide or CBN, low speed / adequate feed, flood coolant; prefer drilling by carbide-tipped or hard-metal drills, or plan holes by laser/waterjet.
Can XAR 500 be welded?
Weldable with low-hydrogen (H5) consumables of lower strength than base metal; preheat 150–200 °C (thicker/higher CEV to 200 °C), interpass ≤225 °C, control heat input and avoid restraint cracking — do not PWHT above the tempering temperature.
Can XAR 500 be formed, bent or molded?
Cold bending possible with punch radius ≥4–5×t (bend axis transverse to rolling direction), generous die opening and de-burred, ground edges; hot forming destroys the Q&T hardness.
What surface finishes work on XAR 500?
Blast and paint or apply zinc-rich primer for corrosion protection; no anodizing — for extreme wear, combine with chromium-carbide hardfacing overlays.
XAR 500 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Cladle analysis, thickness dependent | ≤ 0.3 | 0.28 |
| Si | ≤ 0.6 | 0.3 |
| Mn | ≤ 1.6 | 1.2 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.01 | 0 |
| Crhardenability | ≤ 1.5 | 0.8 |
| Nitoughness, higher in thick plate | ≤ 1 | 0.3 |
| Mo | ≤ 0.6 | 0.3 |
| Bboron-treated for hardenability | ≤ 0.01 | 0 |
| Fe | balance | — |
XAR 500 QT-TUF — frequently asked
What is XAR 500 QT-TUF used for?
XAR 500 QT-TUF is typically used for crusher liners, dump bodies and mining equipment wear parts. In short: 500 HB severe-abrasion plate; hardox 500 equivalent; still field-weldable.
What is the yield strength of XAR 500 QT-TUF?
XAR 500 QT-TUF has a typical yield strength of 1,350 MPa (196 ksi) and a tensile strength of 1,650 MPa (239 ksi) — stronger than 95% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is XAR 500 QT-TUF easy to machine?
Not especially — machinability is rated not recommended (12/100, worse than 99% of steel grades). Treat as ~50 HRC hardened steel: rigid setup, negative-rake carbide or CBN, low speed / adequate feed, flood coolant; prefer drilling by carbide-tipped or hard-metal drills, or plan holes by laser/waterjet.
Can XAR 500 QT-TUF be welded?
With care — weldability is rated fair (48/100). Weldable with low-hydrogen (H5) consumables of lower strength than base metal; preheat 150–200 °C (thicker/higher CEV to 200 °C), interpass ≤225 °C, control heat input and avoid restraint cracking — do not PWHT above the tempering temperature.
What surface finishes work on XAR 500 QT-TUF?
Blast and paint or apply zinc-rich primer for corrosion protection; no anodizing — for extreme wear, combine with chromium-carbide hardfacing overlays.
Can XAR 500 QT-TUF be formed, bent or molded?
Cold bending possible with punch radius ≥4–5×t (bend axis transverse to rolling direction), generous die opening and de-burred, ground edges; hot forming destroys the Q&T hardness.
What is the maximum service temperature of XAR 500 QT-TUF?
XAR 500 QT-TUF is rated for continuous use to about 250°C (482 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between XAR 500-QT and XAR 500 QT-TUF?
QT is the default condition — standard mill-delivered condition for XAR 500 plate, 4–65 mm; pick for severe sliding abrasion where impact loading is moderate. QT-TUF: choose when the 500 HB wear class must also survive impact/cold service — tighter chemistry and cleanliness give guaranteed CVN at −40 °C. Yield strength is 1,300 MPa in QT versus 1,350 MPa in QT-TUF.
Sources
- XAR wear-resistant steel plate product information — thyssenkrupp Steel Europe (2021)
- Hardox 500 / Hardox 500 Tuf data sheet (equivalent grade) — SSAB (2023)
- GB/T 24186 Wear-resistant steel plates for engineering machinery (NM500) — SAC (2022)
- EN 10029 / EN ISO 6506 (plate tolerances, Brinell hardness testing) — CEN (2010)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels — ASM International (1990)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.