Steel X82WMoCrV6-5-4-HT64
Heat-treated state
EN X82WMoCrV6-5-4 · GB W6Mo5Cr4V2
HT64 = hT 64–66 HRC
Pick for maximum wear resistance and red hardness (cutting tools, hot-running rollers) where impact loading is low.
Values for the HT64 condition
Other X82WMoCrV6-5-4 tempers and conditions
X82WMoCrV6-5-4 is listed in 6 conditions; see the grade overview at X82WMoCrV6-5-4.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ADefault Solution annealed | Standard as-delivered condition for machining, forging and blank preparation before hardening. | 550 | 880 | 12 | 250 HB | — |
Cold drawn / ground annealed bar | Choose for small-diameter precision bar and drill rod where tight tolerance and straightness are needed before hardening. | 700 | 950 | 8 | 26 HRC | 3.1 % IACS |
HT 60–62 HRC | Standard condition for high-temperature rolling bearings: austenitize ~1190–1210 °C, quench, temper 3× at 540–560 °C for dimensional stability to ~450 °C. | 2,000 | 2,300 | 1 | 61 HRC | — |
HT64This page HT 64–66 HRC | Pick for maximum wear resistance and red hardness (cutting tools, hot-running rollers) where impact loading is low. | 2,050 | 2,300 | 0.3 | 65 HRC | 2.7 % IACS |
HT 62–64 HRC | Balanced hardness/toughness setting for rolling elements, punches and cutting tools with moderate shock. | 2,100 | 2,400 | 0.5 | 63 HRC | 2.8 % IACS |
HT + sub-zero | Use for precision bearings and gauges where retained austenite must be minimised for long-term dimensional stability. | 2,150 | 2,450 | 0.6 | 62 HRC | 2.8 % IACS |
What is X82WMoCrV6-5-4-HT64?
X82WMoCrV6-5-4-HT64 is X82WMoCrV6-5-4 heat treated to HT64 — pick for maximum wear resistance and red hardness (cutting tools, hot-running rollers) where impact loading is low. X82WMoCrV6-5-4-HT64 has a yield strength of 2,050 MPa (297 ksi) and a tensile strength of 2,300 MPa (334 ksi) — stronger than 100% of steel grades. Elongation at break is 0.3% and the elastic modulus is 220 GPa (31.9 Msi). X82WMoCrV6-5-4-HT64 has a density of 8.16 g/cm³ (0.295 lb/in³), heavier than 98% of steel grades. It melts at 1,260°C (2,300 °F). A is the default condition FabDigit quotes; HT64 is available on request or by drawing note.
Advantages
- High strength — 2,050 MPa (297 ksi), better than 100% of steel grades
- Polishes to a fine finish — 88/100, better than 100% of steel grades
- High service temperature — 540°C (1,004 °F), better than 93% of steel grades
Limitations
- Limited ductility — 0.3%, worse than 100% of steel grades
- Difficult to machine — 3/100, worse than 100% of steel grades
- Difficult to weld — 5/100, worse than 100% of steel grades
- Limited formability — 1/100, worse than 100% of steel grades
- Low electrical conductivity — 2.7 % IACS, worse than 96% of steel grades
X82WMoCrV6-5-4-HT64 properties
Typical room-temperature values for X82WMoCrV6-5-4-HT64; 22 are specific to this condition. Other listed values are X82WMoCrV6-5-4 reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
X82WMoCrV6-5-4-HT64 has a density of 8.16 g/cm³ (0.295 lb/in³), heavier than 98% of steel grades. It melts at 1,260°C (2,300 °F).
Mechanical14
X82WMoCrV6-5-4-HT64 has a yield strength of 2,050 MPa (297 ksi) and a tensile strength of 2,300 MPa (334 ksi) — stronger than 100% of steel grades. Elongation at break is 0.3% and the elastic modulus is 220 GPa (31.9 Msi).
Thermal6
X82WMoCrV6-5-4-HT64 is rated for continuous service to 540°C (1,004 °F). It conducts heat at 22 W/m·K (12.7 BTU/hr·ft·°F), worse than 93% of steel grades. Thermal expansion is 11 µm/m·K (6.11 µin/in·°F).
Electrical3
X82WMoCrV6-5-4-HT64 conducts electricity at 2.7 % IACS, worse than 96% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (20/100), better than 87% of steel grades.
Sustainability4
Producing a kilogram of X82WMoCrV6-5-4-HT64 takes about 45 MJ of energy and emits 3.3 kg of CO₂ — more than 93% of steel grades. Typical recycled content is 35%.
Manufacturability6
X82WMoCrV6-5-4-HT64's machinability is not recommended (3/100, worse than 100% of steel grades); weldability not recommended (5/100); formability not recommended (1/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with X82WMoCrV6-5-4-HT64
Is X82WMoCrV6-5-4 easy to machine?
Machine only in the annealed (≤269 HB) state with sharp, rigid setups — cobalt HSS or coated carbide, low speeds and heavy positive rake; hardened 60–65 HRC parts require CBN turning, creep-feed grinding or EDM.
Can X82WMoCrV6-5-4 be welded?
Not a structural weld material; repair welding needs 450–550 °C preheat, matching HSS/tool-steel filler, slow furnace cooling and full re-temper.
Can X82WMoCrV6-5-4 be formed, bent or molded?
Hot forge 1100 → 900 °C with slow furnace cooling to the annealed state; no meaningful cold forming — anneal 800–840 °C slow cool before any deformation.
What surface finishes work on X82WMoCrV6-5-4?
Not anodizable; protect with oil, phosphate or black oxide, or apply TiN/TiAlN/DLC PVD below the tempering temperature; hardened surfaces polish and lap to bearing-grade finishes.
X82WMoCrV6-5-4 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 |
|---|---|---|
| C | 0.78 – 0.88 | 0.82 |
| Si | 0.15 – 0.45 | 0.3 |
| Mn | 0.2 – 0.45 | 0.3 |
| P | ≤ 0.03 | — |
| Smax; ≤0.015 for bearing quality | ≤ 0.03 | — |
| Cr | 3.75 – 4.5 | 4.15 |
| Mo | 4.7 – 5.2 | 5 |
| W | 5.9 – 6.7 | 6.3 |
| V | 1.65 – 2.2 | 1.9 |
| Fe | balance | — |
X82WMoCrV6-5-4-HT64 — frequently asked
What is X82WMoCrV6-5-4-HT64 used for?
X82WMoCrV6-5-4-HT64 is typically used for high-temperature rolling bearings, aerospace and turbine bearing components and specialty tool and bearing hybrids. In short: M2-type bearing steel; retains hardness when hot; very high wear resistance.
What is the yield strength of X82WMoCrV6-5-4-HT64?
X82WMoCrV6-5-4-HT64 has a typical yield strength of 2,050 MPa (297 ksi) and a tensile strength of 2,300 MPa (334 ksi) — stronger than 100% of steel grades. Strength varies by condition: see the 6 listed tempers.
Is X82WMoCrV6-5-4-HT64 easy to machine?
Not especially — machinability is rated not recommended (3/100, worse than 100% of steel grades). Machine only in the annealed (≤269 HB) state with sharp, rigid setups — cobalt HSS or coated carbide, low speeds and heavy positive rake; hardened 60–65 HRC parts require CBN turning, creep-feed grinding or EDM.
Can X82WMoCrV6-5-4-HT64 be welded?
Not readily — weldability is rated not recommended (5/100). Not a structural weld material; repair welding needs 450–550 °C preheat, matching HSS/tool-steel filler, slow furnace cooling and full re-temper.
What surface finishes work on X82WMoCrV6-5-4-HT64?
Not anodizable; protect with oil, phosphate or black oxide, or apply TiN/TiAlN/DLC PVD below the tempering temperature; hardened surfaces polish and lap to bearing-grade finishes.
Can X82WMoCrV6-5-4-HT64 be formed, bent or molded?
Hot forge 1100 → 900 °C with slow furnace cooling to the annealed state; no meaningful cold forming — anneal 800–840 °C slow cool before any deformation.
What is the maximum service temperature of X82WMoCrV6-5-4-HT64?
X82WMoCrV6-5-4-HT64 is rated for continuous use to about 540°C (1,004 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between X82WMoCrV6-5-4-A and X82WMoCrV6-5-4 HT-SZ?
A is the default condition — standard as-delivered condition for machining, forging and blank preparation before hardening. HT-SZ: use for precision bearings and gauges where retained austenite must be minimised for long-term dimensional stability. Yield strength is 550 MPa in A versus 2,150 MPa in HT-SZ.
Sources
- EN ISO 683-17 — Heat-treated steels, alloy steels and free-cutting steels — Part 17: Ball and roller bearing steels — ISO/CEN (2014)
- GB/T 9943 — (W6Mo5Cr4V2) — SAC (2008)
- ASTM A600 / AISI M2 high speed tool steel — ASTM (2016)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys (Tool Steels) — ASM International (1990)
- ASM Handbook Vol.16 — Machining (tool steel machinability ratings) — ASM International (1989)
- Böhler S600 / Erasteel ASP-M2 high speed steel data sheets — voestalpine Böhler Edelstahl / Erasteel (2021)
- W6Mo5Cr4V2 (Mysteel / 1688 ) — Mysteel / 1688 (2025)
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.