Steel X82WMoCrV6-5-4-A vs X82WMoCrV6-5-4-HT64
Steel · X82WMoCrV6-5-4 temper comparison
X82WMoCrV6-5-4-A and X82WMoCrV6-5-4-HT64 are two conditions of the same steel grade, X82WMoCrV6-5-4: A (solution annealed) versus HT64 (HT 64–66 HRC). The chemistry is identical, so every difference below comes from the condition. X82WMoCrV6-5-4-HT64 is the stronger of the two: yield strength 2,050 MPa (297 ksi) against 550 MPa (79.8 ksi) for X82WMoCrV6-5-4-A, about 3.7 times as much; tensile strength follows at 2,300 MPa (334 ksi) vs 880 MPa (128 ksi). In exchange, X82WMoCrV6-5-4-A is the more ductile: elongation 12% versus 0.3% for X82WMoCrV6-5-4-HT64, and X82WMoCrV6-5-4-HT64 is harder (850 HV vs 262 HV). X82WMoCrV6-5-4-HT64 runs hotter in service (540°C vs 300°C continuous) and X82WMoCrV6-5-4-A conducts electricity better (3.1 % IACS vs 2.7 % IACS). On the shop floor, X82WMoCrV6-5-4-A machines more easily (fair vs not recommended) and X82WMoCrV6-5-4-A welds better (poor vs not recommended).
X82WMoCrV6-5-4-AChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
X82WMoCrV6-5-4-HT64Choose it when strength drives the design, or when the part sees heat.
X82WMoCrV6-5-4-A vs X82WMoCrV6-5-4-HT64: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all steel grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
X82WMoCrV6-5-4-AX82WMoCrV6-5-4-HT64
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Charpy V-Notch Impact (RT)
Hardness, Vickers
Same in both: Shear Modulus 84 GPa12.2 Msi · Bulk Modulus 165 GPa23.9 Msi · Poisson's Ratio 0.29 · Hardness, Brinell 250 HB · Hardness, Rockwell B 100 HRB
Physical
Density and transition temperatures.
Same in both: Density 8.16 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,260°C2,300 °F · Liquidus Temperature 1,430°C2,606 °F
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 420 J/kg·K0.1 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 11 µm/m·K6.1 µin/in·°F · Latent Heat of Fusion 250 J/g107 BTU/lb · Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.55 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Polishability
Same in both: Brazeability / Solderability 45 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 45 MJ/kg19,347 BTU/lb · Embodied Carbon (primary production) 3.3 kg CO₂/kg · Embodied Water 70 L/kg8.4 gal/lb · Typical Recycled Content 35%
Strength versus weight
Yield strength against density for every steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
X82WMoCrV6-5-4-A vs X82WMoCrV6-5-4-HT64 — frequently asked
Is X82WMoCrV6-5-4-HT64 stronger than X82WMoCrV6-5-4-A?
Yes. X82WMoCrV6-5-4-HT64 has a typical yield strength of 2,050 MPa (297 ksi) against 550 MPa (79.8 ksi) for X82WMoCrV6-5-4-A — about 3.7 times as much. Tensile strength is 2,300 MPa (334 ksi) vs 880 MPa (128 ksi).
Which condition does FabDigit quote by default, A or HT64?
A is the default X82WMoCrV6-5-4 condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which is easier to machine, X82WMoCrV6-5-4-A or X82WMoCrV6-5-4-HT64?
X82WMoCrV6-5-4-A. Its machinability rates fair (35/100) against not recommended (3/100) for X82WMoCrV6-5-4-HT64; for welding the order is X82WMoCrV6-5-4-A first (poor, 20/100) then X82WMoCrV6-5-4-HT64 (not recommended, 5/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in X82WMoCrV6-5-4-A and X82WMoCrV6-5-4-HT64 side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.