Aluminum K100-S · other
Aluminum K100-S-STD
Properties of the STD condition, compared with the other K100-S tempers.
The only normally stocked condition: use it wherever flatness and stress-free machining matter more than strength.
What is K100-S-STD?
K100-S-STD is K100-S in the STD condition — the only normally stocked condition: use it wherever flatness and stress-free machining matter more than strength. K100-S-STD has a yield strength of 110 MPa (16 ksi) and a tensile strength of 180 MPa (26.1 ksi) — weaker than 81% of aluminum grades. Elongation at break is 3% and the elastic modulus is 70 GPa (10.2 Msi). K100-S-STD has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 570°C (1,058 °F).
Advantages
- Low embodied carbon — 9 kg CO₂/kg, better than 99% of aluminum grades
- Easy to machine — 88/100, better than 96% of aluminum grades
- Good corrosion resistance — 68/100, better than 75% of aluminum grades
Limitations
- Hard to polish — 40/100, worse than 90% of aluminum grades
- Low strength — 110 MPa (16 ksi), worse than 81% of aluminum grades
- Limited ductility — 3%, worse than 79% of aluminum grades
K100-S-STD properties
Typical room-temperature values for K100-S-STD — 10 properties are specific to this condition; the rest are grade-level values shared by every K100-S temper. Each bar shows where the value sits among the aluminum grades in FabDigit's library — further right is higher.
Physical3
K100-S-STD has a density of 2.66 g/cm³ (0.0961 lb/in³), lighter than 84% of aluminum grades. It melts at 570°C (1,058 °F).
Mechanical10
K100-S-STD has a yield strength of 110 MPa (16 ksi) and a tensile strength of 180 MPa (26.1 ksi) — weaker than 81% of aluminum grades. Elongation at break is 3% and the elastic modulus is 70 GPa (10.2 Msi).
Thermal6
K100-S-STD is rated for continuous service to 150°C (302 °F). It conducts heat at 140 W/m·K (80.9 BTU/hr·ft·°F), worse than 52% of aluminum grades. Thermal expansion is 23.8 µm/m·K (13.2 µin/in·°F).
Electrical3
K100-S-STD conducts electricity at 32 % IACS, worse than 63% of aluminum grades.
Chemical & Environmental3
Corrosion resistance is good (68/100), better than 75% of aluminum grades.
Sustainability4
Producing a kilogram of K100-S-STD takes about 150 MJ of energy and emits 9 kg of CO₂ — less than 97% of aluminum grades. Typical recycled content is 50%.
Manufacturability8
K100-S-STD's machinability is excellent (88/100, better than 96% of aluminum grades); weldability good (60/100); formability not recommended (12/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other K100-S tempers and conditions
K100-S is also supplied in 1 other condition. The full side-by-side table is on the K100-S overview.
- STDThe only normally stocked condition: use it wherever flatness and stress-free machining matter more than strength.110 MPa yield · 70 HB
Working with K100-S-STD
Is K100-S easy to machine?
Outstanding: cuts freely with polished-flute carbide, holds flatness after heavy one-side milling because the plate is stress-relieved; use sharp tools and air/mist to avoid the slightly gummy Al–Mg smearing.
Can K100-S be welded?
GTAW/GMAW with 5356 filler is possible for repairs, but cast micro-porosity outgasses — pre-mill the joint, expect porosity and local distortion, and re-stress-relieve if flatness is critical.
Can K100-S be formed, bent or molded?
Not a forming alloy — the cast structure has 2–5 % elongation, so no bending, rolling or stamping; produce all shape by machining.
What surface finishes work on K100-S?
Hard anodize (Type III) or electroless nickel for wear surfaces; decorative anodize is blotchy, so painting, bead blast or black hardcoat are the usual cosmetic routes; polishing reveals scattered pinholes.
K100-S chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Mgproprietary Al–Mg cast-plate chemistry, approximately in the 5052/5083 magnesium range; exact limits not published | 4 – 5.5 | 4.8 |
| Mngrain/structure control | 0 – 0.5 | 0.2 |
| Siimpurity limit (typical for cast tooling plate) | ≤ 0.4 | — |
| Feimpurity limit | ≤ 0.5 | — |
| Cuimpurity limit | ≤ 0.2 | — |
| Cr | ≤ 0.25 | — |
| Zn | ≤ 0.2 | — |
| Tigrain refiner | ≤ 0.2 | — |
| Al | balance | — |
K100-S-STD — frequently asked
What is K100-S-STD used for?
K100-S-STD is typically used for tooling and mould plates, composite layup moulds, vacuum chuck plates, inspection and gauge fixtures, injection and blow mould frames and automation equipment base plates. In short: premium cast tool plate.
What is the yield strength of K100-S-STD?
K100-S-STD has a typical yield strength of 110 MPa (16 ksi) and a tensile strength of 180 MPa (26.1 ksi) — weaker than 81% of aluminum grades. Strength varies by condition: see the 2 listed tempers.
Is K100-S-STD easy to machine?
Yes — machinability is rated excellent (88/100, better than 96% of aluminum grades). Outstanding: cuts freely with polished-flute carbide, holds flatness after heavy one-side milling because the plate is stress-relieved; use sharp tools and air/mist to avoid the slightly gummy Al–Mg smearing.
Can K100-S-STD be welded?
Yes — weldability is rated good (60/100). GTAW/GMAW with 5356 filler is possible for repairs, but cast micro-porosity outgasses — pre-mill the joint, expect porosity and local distortion, and re-stress-relieve if flatness is critical.
What surface finishes work on K100-S-STD?
Hard anodize (Type III) or electroless nickel for wear surfaces; decorative anodize is blotchy, so painting, bead blast or black hardcoat are the usual cosmetic routes; polishing reveals scattered pinholes.
Can K100-S-STD be formed, bent or molded?
Not a forming alloy — the cast structure has 2–5 % elongation, so no bending, rolling or stamping; produce all shape by machining.
What is the maximum service temperature of K100-S-STD?
K100-S-STD is rated for continuous use to about 150°C (302 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in K100-S-STD?
Yes — K100-S-STD is available for CNC machining with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- K100-S cast aluminum tooling plate data sheet — Vista Metals Corp. (2022)
- Cast aluminum tooling plate property records (Mic 6 / Alca 5 / ATP-5 class) — MatWeb (2024)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys — ASM International (1990)
- Aluminum Standards and Data (Al–Mg alloy reference values) — The Aluminum Association (2017)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.