Stainless Steel 1.4405 vs CA15
Stainless Steel · grade comparison
Stainless Steel 1.4405 and CA15 are both stainless steel grades. 1.4405 is the stronger of the two: yield strength 620 MPa (89.9 ksi) against 510 MPa (74 ksi) for CA15, about 22% more; tensile strength follows at 850 MPa (123 ksi) vs 700 MPa (102 ksi). In exchange, CA15 is the more ductile: elongation 22% versus 18% for 1.4405, and 1.4405 is harder (285 HB vs 225 HB). CA15 runs hotter in service (650°C vs 400°C continuous) and CA15 conducts electricity better (3 % IACS vs 2.2 % IACS). On the shop floor, CA15 machines more easily (45 vs 35 out of 100) and 1.4405 welds better (good vs fair).
1.4405Choose it when strength drives the design, or when it will be welded.
CA15Choose it when the part is bent, formed or impact-loaded, or when the part sees heat.
1.4405 vs CA15: 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.
Shear 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, Brinell
Hardness, Rockwell C
Hardness, Vickers
Same in both: Elastic (Young's) Modulus 200 GPa29 Msi · Bulk Modulus 160 GPa23.2 Msi
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
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (continuous)
Min Service Temperature
Same in both: Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · 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
Castability
Brazeability / Solderability
Polishability
Same in both: Formability (cold) 10 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Water
Typical Recycled Content
Same in both: Embodied Carbon (primary production) 3.6 kg CO₂/kg
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 stainless steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | 1.4405 | CA15 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$ Premium | $$$ Premium |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 7 finishes: Electroless Nickel (EN), Epoxy Coating, Gold Plating, Hard Chrome Plating, Pickling, Plasma Spray, Silver Plating.
1.4405 vs CA15 — frequently asked
Is 1.4405 stronger than CA15?
Yes. 1.4405 has a typical yield strength of 620 MPa (89.9 ksi) against 510 MPa (74 ksi) for CA15 — about 22% more. Tensile strength is 850 MPa (123 ksi) vs 700 MPa (102 ksi).
Which is cheaper, 1.4405 or CA15?
Both sit in the same relative cost tier ($$$, premium); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, 1.4405 or CA15?
CA15, by a small margin. Both rate fair for machinability — 45/100 against 35/100 for 1.4405; for welding the order is 1.4405 first (good, 60/100) then CA15 (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4405 and CA15 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.