Stainless Steel CB7Cu-1-H1025 vs CB7Cu-1-H900
Stainless Steel · CB7Cu-1 temper comparison
CB7Cu-1-H1025 and CB7Cu-1-H900 are two conditions of the same stainless steel grade, CB7Cu-1: 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. CB7Cu-1-H900 is the stronger of the two: yield strength 1,240 MPa (180 ksi) against 1,000 MPa (145 ksi) for CB7Cu-1-H1025, about 24% more; tensile strength follows at 1,350 MPa (196 ksi) vs 1,070 MPa (155 ksi). In exchange, CB7Cu-1-H1025 is the more ductile: elongation 11% versus 8% for CB7Cu-1-H900, and CB7Cu-1-H900 is harder (400 HB vs 320 HB). On the shop floor, CB7Cu-1-H1025 welds better (good vs fair).
CB7Cu-1-H1025Choose it when the part is bent, formed or impact-loaded, or when it will be welded.
CB7Cu-1-H900Choose it when strength drives the design.
CB7Cu-1-H1025 vs CB7Cu-1-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.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
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, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 196 GPa28.4 Msi · Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 152 GPa22 Msi · Poisson's Ratio 0.28
Physical
Density and transition temperatures.
Same in both: Density 7.75 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.
Thermal Conductivity
Max Service Temperature (continuous)
Same in both: Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 10.9 µm/m·K6.1 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -70°C-94 °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) -0.29 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Same in both: Formability (cold) 8 / 100 · Castability 70 / 100 · Brazeability / Solderability 40 / 100 · Polishability 72 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 58 MJ/kg24,936 BTU/lb · Embodied Carbon (primary production) 5 kg CO₂/kg · Embodied Water 130 L/kg15.6 gal/lb · Typical Recycled Content 60%
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.
CB7Cu-1-H1025 vs CB7Cu-1-H900 — frequently asked
Is CB7Cu-1-H900 stronger than CB7Cu-1-H1025?
Yes. CB7Cu-1-H900 has a typical yield strength of 1,240 MPa (180 ksi) against 1,000 MPa (145 ksi) for CB7Cu-1-H1025 — about 24% more. Tensile strength is 1,350 MPa (196 ksi) vs 1,070 MPa (155 ksi).
Which condition does FabDigit quote by default, H1025 or H900?
H1150 is the default CB7Cu-1 condition in the FabDigit quote flow (neither H1025 nor H900). 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, CB7Cu-1-H1025 or CB7Cu-1-H900?
CB7Cu-1-H1025. Its machinability rates fair (39/100) against poor (30/100) for CB7Cu-1-H900; for welding the order is CB7Cu-1-H1025 first (good, 60/100) then CB7Cu-1-H900 (fair, 45/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in CB7Cu-1-H1025 and CB7Cu-1-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.