Stainless Steel Custom 450-H1025 vs Custom 450-H900
Stainless Steel · Custom 450 temper comparison
Custom 450-H1025 and Custom 450-H900 are two conditions of the same stainless steel grade, Custom 450: H1025 (aged 552 °C (1025 °F) for 4 h) versus H900 (aged 482 °C (900 °F) for 1 h, peak hardness). The chemistry is identical, so every difference below comes from the condition. Custom 450-H900 is the stronger of the two: yield strength 1,205 MPa (175 ksi) against 1,000 MPa (145 ksi) for Custom 450-H1025, about 21% more; tensile strength follows at 1,310 MPa (190 ksi) vs 1,070 MPa (155 ksi). In exchange, Custom 450-H1025 is the more ductile: elongation 16% versus 14% for Custom 450-H900, and Custom 450-H900 is harder (390 HB vs 320 HB).
Custom 450-H1025Choose it when the part is bent, formed or impact-loaded.
Custom 450-H900Choose it when strength drives the design.
Custom 450-H1025 vs Custom 450-H900: 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.
Custom 450-H1025Custom 450-H900
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)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29 · Compressive Strength 1,240 MPa180 ksi · Shear Strength 790 MPa115 ksi · Fracture Toughness (K_IC) 80 MPa·√m72.8 ksi·√in
Physical
Density and transition temperatures.
Same in both: Density 7.75 g/cm³0.28 lb/in³ · Melting Point (Solidus) 1,400°C2,552 °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 15.9 W/m·K9.2 BTU/hr·ft·°F · Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.6 µm/m·K5.9 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -75°C-103 °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) -0.25 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Same in both: Weldability 60 / 100 · Formability (cold) 20 / 100 · Brazeability / Solderability 45 / 100 · Polishability 78 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 57 MJ/kg24,506 BTU/lb · Embodied Carbon (primary production) 4.6 kg CO₂/kg · Embodied Water 130 L/kg15.6 gal/lb · Typical Recycled Content 40%
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.
Custom 450-H1025 vs Custom 450-H900 — frequently asked
Is Custom 450-H900 stronger than Custom 450-H1025?
Yes. Custom 450-H900 has a typical yield strength of 1,205 MPa (175 ksi) against 1,000 MPa (145 ksi) for Custom 450-H1025 — about 21% more. Tensile strength is 1,310 MPa (190 ksi) vs 1,070 MPa (155 ksi).
Which condition does FabDigit quote by default, H1025 or H900?
H900 is the default Custom 450 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, Custom 450-H1025 or Custom 450-H900?
Custom 450-H1025, by a small margin. Both rate poor for machinability — 34/100 against 28/100 for Custom 450-H900.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Custom 450-H1025 and Custom 450-H900 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.