Stainless Steel 1.4449 CW3/4H vs 1.4449-HR
Stainless Steel · 1.4449 temper comparison
1.4449 CW3/4H and 1.4449-HR are two conditions of the same stainless steel grade, 1.4449: CW3/4H (3/4 Hard) versus HR (hot rolled). The chemistry is identical, so every difference below comes from the condition. 1.4449 CW3/4H is the stronger of the two: yield strength 800 MPa (116 ksi) against 250 MPa (36.3 ksi) for 1.4449-HR, about 3.2 times as much; tensile strength follows at 1,030 MPa (149 ksi) vs 540 MPa (78.3 ksi). In exchange, 1.4449-HR is the more ductile: elongation 45% versus 8% for 1.4449 CW3/4H, and 1.4449 CW3/4H is harder (310 HB vs 155 HB). 1.4449-HR runs hotter in service (800°C vs 300°C continuous). On the shop floor, 1.4449-HR welds better (excellent vs good).
1.4449 CW3/4HChoose it when strength drives the design.
1.4449-HRChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
1.4449 CW3/4H vs 1.4449-HR: 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.
Elastic (Young's) Modulus
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 B
Hardness, Vickers
Same in both: Shear Modulus 77 GPa11.2 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.3
Physical
Density and transition temperatures.
Same in both: Density 8 g/cm³0.29 lb/in³ · Melting Point (Solidus) 1,370°C2,498 °F · Liquidus Temperature 1,400°C2,552 °F
Thermal
How each material carries heat and how hot it can run.
Max Service Temperature (continuous)
Same in both: Thermal Conductivity 15 W/m·K8.7 BTU/hr·ft·°F · Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F · Thermal Expansion (CTE, 20–100 °C) 16 µm/m·K8.9 µin/in·°F · Latent Heat of Fusion 270 J/g116 BTU/lb · Min Service Temperature -196°C-321 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Conductivity 2.3 % IACS · Electrical Resistivity 7.5×10⁻⁷ Ω·m29.5 µΩ·in
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.05 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Polishability
Same in both: Castability 45 / 100 · Brazeability / Solderability 60 / 100
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 53 MJ/kg22,786 BTU/lb · Embodied Carbon (primary production) 4.6 kg CO₂/kg · Embodied Water 120 L/kg14.4 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.
1.4449 CW3/4H vs 1.4449-HR — frequently asked
Is 1.4449 CW3/4H stronger than 1.4449-HR?
Yes. 1.4449 CW3/4H has a typical yield strength of 800 MPa (116 ksi) against 250 MPa (36.3 ksi) for 1.4449-HR — about 3.2 times as much. Tensile strength is 1,030 MPa (149 ksi) vs 540 MPa (78.3 ksi).
Which condition does FabDigit quote by default, CW3/4H or HR?
AT is the default 1.4449 condition in the FabDigit quote flow (neither CW3/4H nor HR). 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, 1.4449 CW3/4H or 1.4449-HR?
1.4449 CW3/4H, by a small margin. Both rate fair for machinability — 46/100 against 40/100 for 1.4449-HR; for welding the order is 1.4449-HR first (excellent, 85/100) then 1.4449 CW3/4H (good, 65/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4449 CW3/4H and 1.4449-HR 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.