Stainless Steel 1.4729 vs HD
Stainless Steel · grade comparison
Stainless Steel 1.4729 and HD are both stainless steel grades. 1.4729 is the stronger of the two: yield strength 420 MPa (60.9 ksi) against 345 MPa (50 ksi) for HD, about 22% more; tensile strength follows at 680 MPa (98.6 ksi) vs 585 MPa (84.8 ksi). In exchange, HD is the more ductile: elongation 16% versus 10% for 1.4729, and 1.4729 is harder (230 HB vs 190 HB). 1.4729 is stiffer (215 GPa vs 195 GPa) and HD runs hotter in service (1,090°C vs 850°C continuous). On the shop floor, 1.4729 machines more easily (fair vs poor) and HD welds better (fair vs poor).
1.4729Choose it when strength drives the design, or when the part is machined in volume.
HDChoose it when the part is bent, formed or impact-loaded, or when the part sees heat.
1.4729 vs HD: 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
Shear Modulus
Bulk 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
Hardness, Rockwell B
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
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Max Service Temperature (continuous)
Min Service Temperature
Electrical
Conductivity and insulation.
Electrical Conductivity
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
Same in both: Galvanic Potential (seawater, vs SCE) -0.3 V
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Machinability Rating (AISI 1212 = 100 %)
Weldability
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Typical Recycled Content
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 | 1.4729 | HD |
|---|---|---|
| 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.
1.4729 vs HD — frequently asked
Is 1.4729 stronger than HD?
Yes. 1.4729 has a typical yield strength of 420 MPa (60.9 ksi) against 345 MPa (50 ksi) for HD — about 22% more. Tensile strength is 680 MPa (98.6 ksi) vs 585 MPa (84.8 ksi).
Which is cheaper, 1.4729 or HD?
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, 1.4729 or HD?
1.4729. Its machinability rates fair (35/100) against poor (25/100) for HD; for welding the order is HD first (fair, 35/100) then 1.4729 (poor, 25/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4729 and HD 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.