Titanium Grade Ti-Pd7B-A (Solution annealed)
Temper · default condition
ASTM B367 Grade Ti-Pd7B
Standard supply condition for chemical-process castings: residual stresses removed, ductility restored, properties meet ASTM B367 minimums.
Values for the A condition
Other Grade Ti-Pd7B tempers and conditions
Grade Ti-Pd7B is listed in 5 conditions; see the grade overview at Grade Ti-Pd7B.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
As fabricated | Lowest cost condition for non-critical corrosion hardware where internal microporosity and lower fatigue life are acceptable. | 375 | 445 | 16 | 152 HB | 3.3 % IACS |
ADefaultThis page Solution annealed | Standard supply condition for chemical-process castings: residual stresses removed, ductility restored, properties meet ASTM B367 minimums. | 380 | 450 | 18 | 150 HB | — |
hot isostatically pressed and annealed | Highest-integrity condition: porosity closed by HIP, then annealed to relieve stress — used for critical valve/pump bodies and weld-repaired castings. | 380 | 455 | 21 | 148 HB | 3.3 % IACS |
Hot isostatic pressed | Choose when internal porosity must be closed for pressure-boundary, fatigue-loaded or radiographically inspected parts. | 385 | 460 | 20 | 150 HB | 3.3 % IACS |
As-welded deposit | Properties of GTAW-repaired casting areas before post-weld anneal; used for acceptance of foundry weld repairs per ASTM B367. | 400 | 470 | 14 | 165 HB | 3.2 % IACS |
What is Grade Ti-Pd7B-A?
Grade Ti-Pd7B-A is Grade Ti-Pd7B in the A temper — standard supply condition for chemical-process castings: residual stresses removed, ductility restored, properties meet ASTM B367 minimums. Grade Ti-Pd7B-A has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 73% of titanium grades. Elongation at break is 18% and the elastic modulus is 103 GPa (14.9 Msi). Grade Ti-Pd7B-A 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).
Advantages
- High electrical conductivity — 3.3 % IACS, better than 92% of titanium grades
- High service temperature — 400°C (752 °F), better than 78% of titanium grades
Grade Ti-Pd7B-A properties
Typical room-temperature values for Grade Ti-Pd7B-A; 10 are specific to this condition. Other listed values are Grade Ti-Pd7B reference data and may not represent this condition. Bars are the position among titanium grades.
Physical3
Grade Ti-Pd7B-A 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-Pd7B-A has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 73% of titanium grades. Elongation at break is 18% and the elastic modulus is 103 GPa (14.9 Msi).
Thermal6
Grade Ti-Pd7B-A is rated for continuous service to 400°C (752 °F). It conducts heat at 16.4 W/m·K (9.48 BTU/hr·ft·°F), better than 71% of titanium grades. Thermal expansion is 8.6 µm/m·K (4.78 µin/in·°F).
Electrical3
Grade Ti-Pd7B-A 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-Pd7B-A takes about 750 MJ of energy and emits 46 kg of CO₂ — more than 95% of titanium grades. Typical recycled content is 30%.
Manufacturability7
Grade Ti-Pd7B-A's machinability is poor (32/100, better than 70% of titanium grades); weldability excellent (85/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Grade Ti-Pd7B-A
Is Grade Ti-Pd7B easy to machine?
Machine like CP Ti: rigid setup, sharp uncoated-carbide or PVD-coated tools, low surface speed (25–50 m/min), heavy flood coolant, no dwelling — cast skin (alpha case) should be chemically milled or ground off first to avoid rapid tool wear.
Can Grade Ti-Pd7B be welded?
Excellent GTAW/EBW/plasma weldability with matching Ti-Pd filler (ERTi-7); requires trailing shield and back purge to <50 ppm O2/N2 and clean, alpha-case-free surfaces; weld repair of castings is routine and normally followed by a vacuum stress-relief anneal.
Can Grade Ti-Pd7B be formed, bent or molded?
Supplied as vacuum-melted (VAR/induction skull) metal poured into rammed graphite or ceramic investment molds; allow ~1.5–2 % shrink, generous fillets and gating for the low superheat, then HIP at ~900 °C/100 MPa to close microporosity.
What surface finishes work on Grade Ti-Pd7B?
Grit blast plus HF-HNO3 chemical milling to remove alpha case; anodize per AMS 2488 for color/galling resistance, or shot-peen for fatigue; do not plate with copper/nickel in service where galvanic coupling or hydrogen pickup can occur.
Grade Ti-Pd7B 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 for reducing-acid/crevice corrosion resistance | 0.12 – 0.25 | 0.18 |
| Oprincipal strengthener in cast CP Ti | ≤ 0.4 | 0.25 |
| Fe | ≤ 0.3 | 0.15 |
| C | ≤ 0.1 | 0.03 |
| N | ≤ 0.05 | 0.02 |
| H | ≤ 0.02 | 0.01 |
| Residuals, eachother elements, each | ≤ 0.1 | — |
| Residuals, totalother elements, total | ≤ 0.4 | — |
| Ti | balance | — |
Grade Ti-Pd7B-A — frequently asked
What is Grade Ti-Pd7B-A used for?
Grade Ti-Pd7B-A is typically used for chemical process pump castings, flue-gas desulfurization hardware and acid handling valve bodies. In short: best crevice-corrosion cast titanium; handles reducing acids; palladium raises cost.
What is the yield strength of Grade Ti-Pd7B-A?
Grade Ti-Pd7B-A has a typical yield strength of 380 MPa (55.1 ksi) and a tensile strength of 450 MPa (65.3 ksi) — weaker than 73% of titanium grades. Strength varies by condition: see the 5 listed tempers.
Is Grade Ti-Pd7B-A easy to machine?
Not especially — machinability is rated poor (32/100, better than 70% of titanium grades). Machine like CP Ti: rigid setup, sharp uncoated-carbide or PVD-coated tools, low surface speed (25–50 m/min), heavy flood coolant, no dwelling — cast skin (alpha case) should be chemically milled or ground off first to avoid rapid tool wear.
Can Grade Ti-Pd7B-A be welded?
Yes — weldability is rated excellent (85/100). Excellent GTAW/EBW/plasma weldability with matching Ti-Pd filler (ERTi-7); requires trailing shield and back purge to <50 ppm O2/N2 and clean, alpha-case-free surfaces; weld repair of castings is routine and normally followed by a vacuum stress-relief anneal.
What surface finishes work on Grade Ti-Pd7B-A?
Grit blast plus HF-HNO3 chemical milling to remove alpha case; anodize per AMS 2488 for color/galling resistance, or shot-peen for fatigue; do not plate with copper/nickel in service where galvanic coupling or hydrogen pickup can occur.
Can Grade Ti-Pd7B-A be formed, bent or molded?
Supplied as vacuum-melted (VAR/induction skull) metal poured into rammed graphite or ceramic investment molds; allow ~1.5–2 % shrink, generous fillets and gating for the low superheat, then HIP at ~900 °C/100 MPa to close microporosity.
What is the maximum service temperature of Grade Ti-Pd7B-A?
Grade Ti-Pd7B-A is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Grade Ti-Pd7B-A and Grade Ti-Pd7B-AW?
A is the default condition — standard supply condition for chemical-process castings: residual stresses removed, ductility restored, properties meet ASTM B367 minimums. AW: properties of GTAW-repaired casting areas before post-weld anneal; used for acceptance of foundry weld repairs per ASTM B367. Yield strength is 380 MPa in A versus 400 MPa in AW.
Sources
- ASTM B367 Standard Specification for Titanium and Titanium Alloy Castings — ASTM International (2022)
- ASTM B265 / ASTM B348 (wrought Grade 7 chemistry and property basis) — ASTM International (2020)
- ASM Handbook Vol. 2: Properties and Selection — Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- Materials Properties Handbook: Titanium Alloys — ASM International (1994)
- Titanium Grade 7 (Ti-0.15Pd) corrosion and physical property data — TIMET / VSMPO producer literature (2021)
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.