Aluminum ATP-5 vs K100-S
Aluminum · grade comparison
Aluminum ATP-5 and K100-S are both aluminum grades, both cast tooling plate al. K100-S is the stronger of the two: tensile strength 180 MPa (26.1 ksi) against 165 MPa (23.9 ksi) for ATP-5, about 9% more. K100-S is harder — 70 HB against 65 HB for ATP-5 — which matters for wear surfaces and threads. K100-S is lighter (2.66 g/cm³ vs 2.78 g/cm³ for ATP-5) and ATP-5 conducts electricity better (40 % IACS vs 32 % IACS). On the shop floor, K100-S welds better (good vs fair).
K100-SChoose it when strength drives the design, or when surface hardness matters.
ATP-5 vs K100-S: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all aluminum 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 aluminum 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
Tensile Strength (Ultimate)
Compressive Strength
Shear Strength
Fatigue Strength (Endurance Limit)
Hardness, Brinell
Same in both: Poisson's Ratio 0.33 · Yield Strength (0.2% offset) 110 MPa16 ksi · Elongation at Break 3%
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)
Min Service Temperature
Same in both: Specific Heat Capacity 900 J/kg·K0.21 BTU/lb·°F · Latent Heat of Fusion 390 J/g168 BTU/lb · Max Service Temperature (continuous) 150°C302 °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)
Polishability
Same in both: Castability 80 / 100 · Brazeability / Solderability 25 / 100
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Typical Recycled Content
Same in both: Embodied Water 1,100 L/kg132 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 aluminum grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | ATP-5 | K100-S |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $$ Standard |
| Min. machined wall | 0.5 mm | 0.5 mm |
| Best machined surface | Ra 0.8 µm | Ra 0.8 µm |
Both are offered for CNC machining. Both take the same 16 finishes: Anodizing Type II, Cerakote, Chem Film (Alodine), DLC, E-Coating, Electroless Nickel (EN), Electropolishing, Epoxy Coating, Gold Plating, Hard Anodize Type III w/ PTFE, Hard Anodizing Type III, Nickel Plating and 4 more.
ATP-5 vs K100-S — frequently asked
Is K100-S stronger than ATP-5?
Yes. K100-S has a typical tensile strength of 180 MPa (26.1 ksi) against 165 MPa (23.9 ksi) for ATP-5 — about 9% more.
Which is cheaper, ATP-5 or K100-S?
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 welds better, ATP-5 or K100-S?
K100-S. Its weldability rates good (60/100) against fair (50/100) for ATP-5.
Ready to make it?
Upload a CAD file and FabDigit prices the part in ATP-5 and K100-S 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.