Dispal® S250
Gränges DISPAL S250 (manufacturer product) | Spray-formed powder-metallurgy DISPAL material; specimen geometry as noted per value
Manufacturer-reported values. Do not use as certified design allowables. View sources ↗
No complete reviewed mechanical condition. Separately reviewed property observations appear below.
Chemical composition
Only reviewed weight-percent bounds are listed. A blank bound means only the other threshold was reported.
| Element / source label | Minimum wt% | Upper wt% |
|---|---|---|
| No reviewed composition claim for this record. | ||
Proprietary Gränges DISPAL S250 powder-metallurgy product, not an AA/EN grade equivalence. The issuer portfolio and brochure give different shorthand chemistry descriptions; no certified chemical limits are published here. Manufacturer mechanical numbers are preliminary minimums for Ø30 mm specimens and reference values for other geometries. The fatigue paragraph states P50% rotary bending but does not state stress ratio. Density carries the printed ±5% tolerance.
Physical and thermal properties
| Property | Reported value | Unit | Condition |
|---|---|---|---|
| density | 2.78 | g/cm³ | At 20°C; manufacturer reports ±5% |
| thermal conductivity | 122.7 | W/(m·K) | Thermal conductivity at 30°C |
Fatigue
Source-reported fatigue values; conditions must be compared before use.
| Property | Value | Stress ratio | Cycles | Condition |
|---|---|---|---|---|
| Fatigue Strength | 108 MPa | Not reported | 50,000,000 | F; 20 °C test; rotary bending; P50%; P50% rotary bending at 20°C; stress ratio not reported; manufacturer mechanical preface uses Ø30 mm specimens and calls other geometries reference-only |
Additional property data
Source-reported values, specification intervals, minimums and strict bounds; an average is labeled only when the source reports it. Compare conditions before use.
| Property | Value | Condition |
|---|---|---|
| ultimate tensile strength | ≥ 103 MPa | F state, Ø30 mm specimen, tensile test at 300°C; preliminary minimum defined as mean minus 3 sigma; other geometries reference only |
Evidence
DISPAL S250 data sheet, GPM-4.3.0-DB-012 Rev. 01 (2024-11) — Gränges AB
Show the exact source location for each value
- density — PDF p. 1, S250 physical properties at 20°C, Density row ↗
- thermal conductivity — PDF p. 1, S250 thermal conductivity table, 30°C column ↗
- fatigue strength — PDF p. 1, S250 F-state fatigue paragraph, P50% rotary bending, 5x10^7 cycles at 20°C ↗
- ultimate tensile strength — PDF p. 1, S250 F-state mechanical table, 300°C tensile-strength cell ↗