Titanium Grade Ti-Pd7B
ASTM B367 Grade Ti-Pd7B
Grade Ti-Pd7B is a palladium-alloyed commercially pure titanium casting grade under ASTM B367, where the small palladium addition shifts the corrosion potential and suppresses crevice attack in reducing acids.
Reference datasheet — Grade Ti-Pd7B is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the A condition
Grade Ti-Pd7B tempers and conditions
Grade Ti-Pd7B is supplied in 5 conditions, soft to hard. A is the default FabDigit quotes; the values on this page are for it.
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 |
ADefault 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?
Grade Ti-Pd7B is a palladium-alloyed commercially pure titanium casting grade under ASTM B367, where the small palladium addition shifts the corrosion potential and suppresses crevice attack in reducing acids. It is cast into pump and valve components for chemical and flue-gas service, offering 380 MPa yield, 450 MPa tensile, 18 % elongation and 150 HB (80 HRB) with service to about 400 °C. Strength is low and palladium raises cost and lead time, so unalloyed C-2 is used where the environment is only mildly aggressive, and Ti-Pd16 covers the same chemistry at lower palladium content. Grade Ti-Pd7B 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). Grade Ti-Pd7B 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).
What is Grade Ti-Pd7B used for?
- chemical process pump castings
- flue-gas desulfurization hardware
- acid handling valve bodies
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 properties
Typical room-temperature values for Grade Ti-Pd7B-A; bars are the position among titanium grades.
Physical3
Grade Ti-Pd7B 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 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 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 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 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'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. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the titanium family
Yield strength against density for every titanium grade FabDigit runs. Grade Ti-Pd7B is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Grade Ti-Pd7B
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.
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 |
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.
Surface treatments FabDigit runs on titanium parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Titanium Grade Ti-Pd7B in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- ASTM
- B367 Grade Ti-Pd7B
How much does Grade Ti-Pd7B cost?
Grade Ti-Pd7B is a high-cost titanium ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Grade Ti-Pd7B — frequently asked
What is Grade Ti-Pd7B used for?
Grade Ti-Pd7B 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?
Grade Ti-Pd7B 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 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 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?
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 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?
Grade Ti-Pd7B 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.
How much does Grade Ti-Pd7B cost?
Grade Ti-Pd7B is a high-cost titanium ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
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; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.