Titanium Grade Ti-Pd8A · print state
Titanium Grade Ti-Pd8A-HIP
Properties of the HIP condition, compared with the other Grade Ti-Pd8A tempers.
Specify for pressure-retaining or fatigue-loaded castings where internal porosity must be closed.
What is Grade Ti-Pd8A-HIP?
Grade Ti-Pd8A-HIP is Grade Ti-Pd8A in the HIP condition — specify for pressure-retaining or fatigue-loaded castings where internal porosity must be closed. Grade Ti-Pd8A-HIP has a yield strength of 315 MPa (45.7 ksi) and a tensile strength of 410 MPa (59.5 ksi) — weaker than 88% of titanium grades. Elongation at break is 21% and the elastic modulus is 103 GPa (14.9 Msi). Grade Ti-Pd8A-HIP has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,660°C (3,020 °F). F is the default condition FabDigit quotes; HIP is available on request or by drawing note.
Advantages
- High electrical conductivity — 3.3 % IACS, better than 92% of titanium grades
- Tough — resists crack growth — 85 MPa·√m (77.4 ksi·√in), better than 91% of titanium grades
- Conducts heat well — 17 W/m·K (9.82 BTU/hr·ft·°F), better than 84% of titanium grades
Limitations
- Low strength — 315 MPa (45.7 ksi), worse than 88% of titanium grades
Grade Ti-Pd8A-HIP properties
Typical room-temperature values for Grade Ti-Pd8A-HIP — 8 properties are specific to this condition; the rest are grade-level values shared by every Grade Ti-Pd8A temper. Each bar shows where the value sits among the titanium grades in FabDigit's library — further right is higher.
Physical3
Grade Ti-Pd8A-HIP has a density of 4.51 g/cm³ (0.163 lb/in³), heavier than 57% of titanium grades. It melts at 1,660°C (3,020 °F).
Mechanical16
Grade Ti-Pd8A-HIP has a yield strength of 315 MPa (45.7 ksi) and a tensile strength of 410 MPa (59.5 ksi) — weaker than 88% of titanium grades. Elongation at break is 21% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
Grade Ti-Pd8A-HIP is rated for continuous service to 315°C (599 °F). It conducts heat at 17 W/m·K (9.82 BTU/hr·ft·°F), better than 84% of titanium grades. Thermal expansion is 8.6 µm/m·K (4.78 µin/in·°F).
Electrical3
Grade Ti-Pd8A-HIP conducts electricity at 3.3 % IACS, better than 92% of titanium grades.
Chemical & Environmental3
Corrosion resistance is excellent (96/100), better than 92% of titanium grades.
Sustainability4
Producing a kilogram of Grade Ti-Pd8A-HIP takes about 700 MJ of energy and emits 42 kg of CO₂ — more than 74% of titanium grades. Typical recycled content is 25%.
Manufacturability8
Grade Ti-Pd8A-HIP's machinability is poor (30/100, better than 64% of titanium grades); weldability excellent (85/100); formability fair (50/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other Grade Ti-Pd8A tempers and conditions
Grade Ti-Pd8A is also supplied in 3 other conditions. The full side-by-side table is on the Grade Ti-Pd8A overview.
- FDefaultStandard low-cost supply condition for non-pressure corrosion hardware where B367 minimum properties suffice.310 MPa yield · 185 HB
- HIPSpecify for pressure-retaining or fatigue-loaded castings where internal porosity must be closed.315 MPa yield · 180 HB
- ANNPick when residual casting stress must be removed before machining or welding, with slightly higher ductility.305 MPa yield · 175 HB
- HIP+ANNHighest-integrity condition: pore-free, stress-free and maximum ductility for critical chemical-plant castings.305 MPa yield · 172 HB
Working with Grade Ti-Pd8A-HIP
Is Grade Ti-Pd8A easy to machine?
Machine like CP titanium: rigid setup, sharp uncoated-carbide or PVD tools, low surface speed (~30–50 m/min), heavy feed, flood coolant to avoid work-hardening, galling and chip fires.
Can Grade Ti-Pd8A be welded?
Excellent GTAW/EBW/PAW weldability with full inert shielding and trailing gas; use ERTi-7/ERTi-11 or matching Pd filler so the weld keeps the same corrosion resistance, keep interpass low and surfaces oxide-free.
Can Grade Ti-Pd8A be formed, bent or molded?
Vacuum-arc or induction skull melting into rammed-graphite or investment moulds with generous risers; alpha-case from mould reaction must be chemically milled or ground off, HIP recommended for pressure parts.
What surface finishes work on Grade Ti-Pd8A?
Grit-blast plus pickle in HNO3/HF to remove alpha case, then passivate; colour anodising is available for identification, and no paint or plating is normally required for corrosion service.
Grade Ti-Pd8A 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 |
|---|---|---|
| Pdpalladium addition responsible for crevice/reducing-acid resistance | 0.12 – 0.25 | 0.18 |
| Ooxygen limit governs strength level of this lower-strength cast grade; verify against current ASTM B367 table | ≤ 0.25 | 0.15 |
| Fe | ≤ 0.25 | 0.1 |
| C | ≤ 0.1 | 0.03 |
| N | ≤ 0.05 | 0.02 |
| H0.015 max on castings; hydrogen control critical for ductility | ≤ 0.02 | 0.01 |
| Residuals (each)total residuals 0.40 max | ≤ 0.1 | — |
| Ti | balance | — |
Grade Ti-Pd8A-HIP — frequently asked
What is Grade Ti-Pd8A-HIP used for?
Grade Ti-Pd8A-HIP is typically used for chlorine processing castings, seawater desalination hardware and corrosion-resistant fasteners cast components. In short: best crevice corrosion resistance; most ductile Pd casting grade; net-shape corrosive-service parts.
What is the yield strength of Grade Ti-Pd8A-HIP?
Grade Ti-Pd8A-HIP has a typical yield strength of 315 MPa (45.7 ksi) and a tensile strength of 410 MPa (59.5 ksi) — weaker than 88% of titanium grades. Strength varies by condition: see the 4 listed tempers.
Is Grade Ti-Pd8A-HIP easy to machine?
Not especially — machinability is rated poor (30/100, better than 64% of titanium grades). Machine like CP titanium: rigid setup, sharp uncoated-carbide or PVD tools, low surface speed (~30–50 m/min), heavy feed, flood coolant to avoid work-hardening, galling and chip fires.
Can Grade Ti-Pd8A-HIP be welded?
Yes — weldability is rated excellent (85/100). Excellent GTAW/EBW/PAW weldability with full inert shielding and trailing gas; use ERTi-7/ERTi-11 or matching Pd filler so the weld keeps the same corrosion resistance, keep interpass low and surfaces oxide-free.
What surface finishes work on Grade Ti-Pd8A-HIP?
Grit-blast plus pickle in HNO3/HF to remove alpha case, then passivate; colour anodising is available for identification, and no paint or plating is normally required for corrosion service.
Can Grade Ti-Pd8A-HIP be formed, bent or molded?
Vacuum-arc or induction skull melting into rammed-graphite or investment moulds with generous risers; alpha-case from mould reaction must be chemically milled or ground off, HIP recommended for pressure parts.
What is the maximum service temperature of Grade Ti-Pd8A-HIP?
Grade Ti-Pd8A-HIP is rated for continuous use to about 315°C (599 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Grade Ti-Pd8A-F and Grade Ti-Pd8A-ANN?
F is the default condition — standard low-cost supply condition for non-pressure corrosion hardware where B367 minimum properties suffice. ANN: pick when residual casting stress must be removed before machining or welding, with slightly higher ductility. Yield strength is 310 MPa in F versus 305 MPa in ANN.
Sources
- ASTM B367 Standard Specification for Titanium and Titanium Alloy Castings — ASTM International (2022)
- ASTM B265 / B348 (wrought Grade 7, 11, 16, 17 Ti-Pd properties for comparison) — ASTM International (2020)
- ASM Handbook Vol.2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol.19 — Fatigue and Fracture (cast titanium) — ASM International (1996)
- TIMET / Titanium corrosion-resistant alloy data (Ti-Pd grades) — TIMET (2018)
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.