Stainless Steel 1.4458 vs 1.4849
Stainless Steel · grade comparison
Stainless Steel 1.4458 and 1.4849 are both stainless steel grades. 1.4849 is the stronger of the two: yield strength 250 MPa (36.3 ksi) against 235 MPa (34.1 ksi) for 1.4458, about 6% more. In exchange, 1.4458 is the more ductile: elongation 42% versus 10% for 1.4849, and 1.4849 is harder (180 HB vs 140 HB). 1.4458 is stiffer (193 GPa vs 170 GPa) and 1.4849 runs hotter in service (1,050°C vs 500°C continuous). On the shop floor, 1.4458 machines more easily (30 vs 20 out of 100) and 1.4458 welds better (65 vs 55 out of 100).
1.4458Choose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
1.4849Choose it when strength drives the design, or when the part sees heat.
1.4458 vs 1.4849: 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
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: Tensile Strength (Ultimate) 490 MPa71.1 ksi
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
Latent Heat of Fusion
Same in both: Specific Heat Capacity 500 J/kg·K0.12 BTU/lb·°F
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
Formability (cold)
Castability
Brazeability / Solderability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 120 L/kg14.4 gal/lb
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 | 1.4458 | 1.4849 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Both take the same 7 finishes: Electroless Nickel (EN), Epoxy Coating, Gold Plating, Hard Chrome Plating, Pickling, Plasma Spray, Silver Plating.
1.4458 vs 1.4849 — frequently asked
Is 1.4849 stronger than 1.4458?
Yes. 1.4849 has a typical yield strength of 250 MPa (36.3 ksi) against 235 MPa (34.1 ksi) for 1.4458 — about 6% more. Tensile strength is 490 MPa (71.1 ksi) vs 490 MPa (71.1 ksi).
Which is cheaper, 1.4458 or 1.4849?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, 1.4458 or 1.4849?
1.4458, by a small margin. Both rate poor for machinability — 30/100 against 20/100 for 1.4849; for welding the order is 1.4458 first (good, 65/100) then 1.4849 (good, 55/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4458 and 1.4849 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.