Steel 1117 vs 1340
Steel · grade comparison
Steel 1117 and 1340 are both steel grades. 1340 is the stronger of the two: yield strength 470 MPa (68.2 ksi) against 235 MPa (34.1 ksi) for 1117, about 100% more; tensile strength follows at 745 MPa (108 ksi) vs 425 MPa (61.6 ksi). In exchange, 1117 is the more ductile: elongation 33% versus 20% for 1340, and 1340 is harder (217 HB vs 121 HB). 1117 conducts heat better (51 W/m·K vs 44 W/m·K). On the shop floor, 1117 machines more easily (very good vs fair), 1117 welds better (50 vs 40 out of 100), and 1117 sits in a lower cost tier (budget, $) than 1340 (standard, $$).
1117Choose it when the part is bent, formed or impact-loaded, or when the part is machined in volume.
1340Choose it when strength drives the design.
1117 vs 1340: 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
Tensile Strength (Ultimate)
Yield Strength (0.2% offset)
Elongation at Break
Reduction in Area
Shear Strength
Fatigue Strength (Endurance Limit)
Charpy V-Notch Impact (RT)
Hardness, Brinell
Hardness, Rockwell B
Same in both: Shear Modulus 80 GPa11.6 Msi · Bulk Modulus 160 GPa23.2 Msi · Poisson's Ratio 0.29
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)
Min Service Temperature
Same in both: Latent Heat of Fusion 250 J/g107 BTU/lb · 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)
Same in both: Corrosion Resistance 10 / 100
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
Same in both: Typical Recycled Content 30%
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 | 1117 | 1340 |
|---|---|---|
| Sheet metal | — | Yes |
| Default condition | HR | HR |
| Relative cost | $ Budget | $$ 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.
1117 vs 1340 — frequently asked
Is 1340 stronger than 1117?
Yes. 1340 has a typical yield strength of 470 MPa (68.2 ksi) against 235 MPa (34.1 ksi) for 1117 — about 100% more. Tensile strength is 745 MPa (108 ksi) vs 425 MPa (61.6 ksi).
Which is cheaper, 1117 or 1340?
1117 is the lower-cost material: it sits in the budget tier ($) while 1340 is standard ($$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, 1117 or 1340?
1117. Its machinability rates very good (70/100) against fair (50/100) for 1340; for welding the order is 1117 first (fair, 50/100) then 1340 (fair, 40/100).
Ready to make it?
Upload a CAD file and FabDigit prices the part in 1117 and 1340 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.