Stainless Steel 17-4 PH-H1025 vs 17-4 PH-H1150
Stainless Steel · 17-4 PH temper comparison
17-4 PH-H1025 and 17-4 PH-H1150 are two conditions of the same stainless steel grade, 17-4 PH: H1025 (aged 552 °C (1025 °F) for 4 h) versus H1150 (overaged 621 °C (1150 °F) for 4 h, maximum toughness). The chemistry is identical, so every difference below comes from the condition. 17-4 PH-H1025 is the stronger of the two: yield strength 1,070 MPa (155 ksi) against 800 MPa (116 ksi) for 17-4 PH-H1150, about 34% more; tensile strength follows at 1,140 MPa (165 ksi) vs 1,000 MPa (145 ksi). In exchange, 17-4 PH-H1150 is the more ductile: elongation 19% versus 15% for 17-4 PH-H1025, and 17-4 PH-H1025 is harder (352 HB vs 293 HB).
17-4 PH-H1025Choose it when strength drives the design.
17-4 PH-H1150Choose it when the part is bent, formed or impact-loaded.
17-4 PH-H1025 vs 17-4 PH-H1150: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all stainless 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 stainless 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.
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Fatigue Strength (Endurance Limit)
Fracture Toughness (K_IC)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Same in both: Elastic (Young's) Modulus 196 GPa28.4 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 142 GPa20.6 Msi · Poisson's Ratio 0.27 · Compressive Strength 790 MPa115 ksi · Shear Strength 660 MPa95.7 ksi · Hardness, Vickers 330 HV
Physical
Density and transition temperatures.
Same in both: Density 7.78 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,404°C2,559 °F · Liquidus Temperature 1,440°C2,624 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 16.3 W/m·K9.4 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.8 µm/m·K6 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -73°C-99 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.2 % IACS · Electrical Resistivity 8×10⁻⁷ Ω·m31.5 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.15 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability Rating (AISI 1212 = 100 %)
Same in both: Machinability 45 / 100 · Weldability 70 / 100 · Formability (cold) 35 / 100 · Castability 65 / 100 · Brazeability / Solderability 45 / 100 · Polishability 75 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 55 MJ/kg23,646 BTU/lb · Embodied Carbon (primary production) 5.2 kg CO₂/kg · Embodied Water 200 L/kg24 gal/lb · Typical Recycled Content 50%
Strength versus weight
Yield strength against density for every stainless steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
17-4 PH-H1025 vs 17-4 PH-H1150 — frequently asked
Is 17-4 PH-H1025 stronger than 17-4 PH-H1150?
Yes. 17-4 PH-H1025 has a typical yield strength of 1,070 MPa (155 ksi) against 800 MPa (116 ksi) for 17-4 PH-H1150 — about 34% more. Tensile strength is 1,140 MPa (165 ksi) vs 1,000 MPa (145 ksi).
Which condition does FabDigit quote by default, H1025 or H1150?
Condition A is the default 17-4 PH condition in the FabDigit quote flow (neither H1025 nor H1150). 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.
When should I choose 17-4 PH-H1025 over 17-4 PH-H1150?
Pick 17-4 PH-H1025 when strength drives the design. Pick 17-4 PH-H1150 when the part is bent, formed or impact-loaded.
Ready to make it?
Upload a CAD file and FabDigit prices the part in 17-4 PH-H1025 and 17-4 PH-H1150 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.