Steel 25Cr2MoVA vs A335 P91
Steel · grade comparison
Steel 25Cr2MoVA and A335 P91 are both steel grades, both heat resistant steel. 25Cr2MoVA is the stronger of the two: yield strength 850 MPa (123 ksi) against 700 MPa (102 ksi) for A335 P91, about 21% more; tensile strength follows at 1,000 MPa (145 ksi) vs 950 MPa (138 ksi). 25Cr2MoVA is the more ductile: elongation 16% versus 14% for A335 P91, and 25Cr2MoVA is harder (315 HV vs 225 HV). 25Cr2MoVA runs hotter in service (520°C vs 200°C continuous) and 25Cr2MoVA conducts heat better (38 W/m·K vs 26 W/m·K). On the shop floor, 25Cr2MoVA machines more easily (fair vs poor) and 25Cr2MoVA welds better (32 vs 20 out of 100).
25Cr2MoVAChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
25Cr2MoVA vs A335 P91: 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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Shear Modulus
Bulk Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Vickers
Same in both: Hardness, Brinell 300 HB · Hardness, Rockwell C 31 HRC
Physical
Density and transition temperatures.
Density
Melting Point (Solidus)
Liquidus Temperature
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Latent Heat of Fusion 270 J/g116 BTU/lb
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Galvanic Potential (seawater, vs SCE)
Corrosion Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Carbon (primary production)
Embodied Water
Same in both: Embodied Energy (primary production) 34 MJ/kg14,617 BTU/lb · Typical Recycled Content 30%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Modulus of Resilience
Thermal Diffusivity
Thermal Shock Resistance Index
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.
Manufacturing and finishing
| Capability | 25Cr2MoVA | A335 P91 |
|---|---|---|
| Default condition | Q&T | HR |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | 0.8 mm | 0.8 mm |
| Best machined surface | Ra 1.6 µm | Ra 1.6 µm |
Both are offered for CNC machining and Sheet metal. Both take the same 38 finishes: AlCrN, AlTiN, Black Oxide, CVD Al2O3, CVD TiCN, CVD TiN, Cerakote, Chrome Plating, Copper Plating, CrN, DLC, E-Coating and 26 more.
25Cr2MoVA vs A335 P91 — frequently asked
Is 25Cr2MoVA stronger than A335 P91?
Yes. 25Cr2MoVA has a typical yield strength of 850 MPa (123 ksi) against 700 MPa (102 ksi) for A335 P91 — about 21% more. Tensile strength is 1,000 MPa (145 ksi) vs 950 MPa (138 ksi).
Which is cheaper, 25Cr2MoVA or A335 P91?
Both sit in the same relative cost tier ($$, standard); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, 25Cr2MoVA or A335 P91?
25Cr2MoVA. Its machinability rates fair (42/100) against poor (25/100) for A335 P91; for welding the order is 25Cr2MoVA first (poor, 32/100) then A335 P91 (poor, 20/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 25Cr2MoVA and A335 P91 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.