Steel 1.2344 vs 1.2738
Steel · grade comparison
Steel 1.2344 and 1.2738 are both steel grades, both mold steel. 1.2344 is the stronger of the two: yield strength 500 MPa (72.5 ksi) against 470 MPa (68.2 ksi) for 1.2738, about 6% more; tensile strength follows at 800 MPa (116 ksi) vs 760 MPa (110 ksi). 1.2738 conducts heat better (33 W/m·K vs 24.5 W/m·K). On the shop floor, 1.2738 machines more easily (good vs fair), 1.2738 welds better (50 vs 35 out of 100), and 1.2738 forms better (30 vs 20 out of 100).
1.2344Choose it when strength drives the design.
1.2738Choose it when the part is machined in volume, or when it will be welded.
1.2344 vs 1.2738: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all 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 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
Poisson's Ratio
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Reduction in Area
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Hardness, Vickers
Fracture Toughness (K_IC)
Hardness, Rockwell C
Same in both: Bulk Modulus 160 GPa23.2 Msi · Elongation at Break 20%
Physical
Density and transition temperatures.
Melting Point (Solidus)
Liquidus Temperature
Same in both: Density 7.8 g/cm³0.28 lb/in³
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Thermal Expansion (CTE, 20–100 °C)
Latent Heat of Fusion
Min Service Temperature
Same in both: Specific Heat Capacity 460 J/kg·K0.11 BTU/lb·°F · Max Service Temperature (continuous) 400°C752 °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)
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 steel grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | 1.2344 | 1.2738 |
|---|---|---|
| Default condition | Annealed | Annealed |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | 0.8 mm | 0.8 mm |
| Best machined surface | Ra 1.6 µm | Ra 1.6 µm |
Both are offered for CNC machining. Both take the same 38 finishes: AlCrN, AlTiN, Black Oxide, CVD Al2O3, CVD TiCN, CVD TiN, Cerakote, Chrome Plating, Copper Plating, CrN, DLC, E-Coating and 26 more.
1.2344 vs 1.2738 — frequently asked
Is 1.2344 stronger than 1.2738?
Yes. 1.2344 has a typical yield strength of 500 MPa (72.5 ksi) against 470 MPa (68.2 ksi) for 1.2738 — about 6% more. Tensile strength is 800 MPa (116 ksi) vs 760 MPa (110 ksi).
Which is cheaper, 1.2344 or 1.2738?
Both sit in the same relative cost tier ($$, standard); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, 1.2344 or 1.2738?
1.2738. Its machinability rates good (65/100) against fair (45/100) for 1.2344; for welding the order is 1.2738 first (fair, 50/100) then 1.2344 (fair, 35/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1.2344 and 1.2738 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.