Stainless Steel 1.4837 vs 12Kh18N9TL
Stainless Steel · grade comparison
Stainless Steel 1.4837 and 12Kh18N9TL are both stainless steel grades. 1.4837 is the stronger of the two: yield strength 265 MPa (38.4 ksi) against 240 MPa (34.8 ksi) for 12Kh18N9TL, about 10% more; tensile strength follows at 520 MPa (75.4 ksi) vs 490 MPa (71.1 ksi). In exchange, 12Kh18N9TL is the more ductile: elongation 35% versus 12% for 1.4837, and 1.4837 is harder (190 HB vs 150 HB). 1.4837 runs hotter in service (1,050°C vs 650°C continuous) and 12Kh18N9TL conducts electricity better (2.4 % IACS vs 1.9 % IACS). On the shop floor, 12Kh18N9TL machines more easily (33 vs 22 out of 100) and 12Kh18N9TL welds better (very good vs fair).
1.4837Choose it when strength drives the design, or when the part sees heat.
12Kh18N9TLChoose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
1.4837 vs 12Kh18N9TL: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Compressive Strength
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Fracture Toughness (K_IC)
Same in both: Bulk Modulus 150 GPa21.8 Msi · Poisson's Ratio 0.29 · Shear Strength 340 MPa49.3 ksi · Fatigue Strength (Endurance Limit) 200 MPa29 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
Same in both: Specific Heat Capacity 500 J/kg·K0.12 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
Formability (cold)
Castability
Polishability
Brazeability / Solderability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Embodied Water
Same in both: Typical Recycled Content 70%
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 | 1.4837 | 12Kh18N9TL |
|---|---|---|
| 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.
1.4837 vs 12Kh18N9TL — frequently asked
Is 1.4837 stronger than 12Kh18N9TL?
Yes. 1.4837 has a typical yield strength of 265 MPa (38.4 ksi) against 240 MPa (34.8 ksi) for 12Kh18N9TL — about 10% more. Tensile strength is 520 MPa (75.4 ksi) vs 490 MPa (71.1 ksi).
Which is cheaper, 1.4837 or 12Kh18N9TL?
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, 1.4837 or 12Kh18N9TL?
12Kh18N9TL, by a small margin. Both rate poor for machinability — 33/100 against 22/100 for 1.4837; for welding the order is 12Kh18N9TL first (very good, 80/100) then 1.4837 (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.4837 and 12Kh18N9TL 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.