Grade 7 Ti-0.2Pd Industrial Titanium Sheet

Compared to other non-palladium modified pure titanium or titanium alloys, the addition of palladium to Grade 7 titanium sheet significantly improves its corrosion resistance in reducing acid environments as well as in certain specific media, especially for equipment in the chemical industry that is exposed to hydrogen sulphide (H₂S) or chloride-containing ions.Grade 7 titanium sheet retains the good weldability of titanium alloys, even with the addition of palladium, and allows for reliable weldability. Reliable weldability, which is especially important in the construction of large chemical plants or in industrial applications requiring complex welded structures.

Chemical Composition

The chemical composition of grade 7 Ti-0.15Pd alloy is outlined in the following table.

Element	Content (%)
Iron, Fe	0.3
Oxygen, O	0.25
Palladium, Pd	0.12-0.25
Carbon, C	0.08
Nitrogen, N	0.03
Hydrogen, H	0.015
Other, total	0.4
Titanium, Ti	Balance

 

Mechanical Properties

The following table shows mechanical properties of grade 17 Ti-0.05Pd alloy.

Properties	Metric	Imperial
Tensile strength	485 MPa	70343 psi
Yield strength	350 MPa	50763 psi
Elastic modulus	103 GPa	14938 ksi
Elongation in 50 mm (A5)	28%	28%
Hardness (HV)	150	150

Grade 7 industrial titanium sheet is used in a wide range of applications such as chemical processing equipment, offshore oil extraction facilities, heat exchangers, pressure vessels, and certain specific aerospace components, especially in applications where extreme corrosion resistance and long-term reliability are required.

 

Grade	Stabilizer	Cost Index	Corrosion Advantage	Primary Application
Grade 2	None	1.0x	Baseline CP	General purpose
Grade 7	0.12–0.25% Pd	2.5–3.5x	Excellent in reducing acids/crevice	Premium corrosion service
Grade 11	0.12–0.25% Pd	2.5–3.5x	Same as Grade 7, lower strength	Formed components
Grade 16	0.04–0.08% Pd	1.8–2.2x	Good crevice resistance, lower Pd	Cost-effective alternative
Grade 26	0.08–0.14% Ru	1.8–2.2x	Similar to Grade 7, Ru stabilizer	Ru alternative to Pd
Grade 12	0.3Mo + 0.8Ni	1.3–1.5x	Good reducing acid resistance	Cost-performance balance

 

What exactly is Titanium Grade 7 sheet?

A: Titanium Grade 7 is a palladium-stabilized commercially pure titanium alloy (UNS R52400), covered under ASTM B265 / ASME SB-265 for sheet, strip, and plate. It is chemically identical to Grade 2, with the critical addition of 0.12–0.25% palladium (Pd) . This small addition dramatically enhances corrosion resistance in reducing acids, crevice conditions, and hot chloride environments where standard Grade 2 may fail.

 

What is the difference between Grade 7 and Grade 7H?

A: Grade 7H has the same chemical composition (including palladium) but carries a higher guaranteed minimum tensile strength of 58 ksi (400 MPa) . Grade 7H material may be certified as meeting Grade 7 requirements, but the reverse is not automatically true. Grade 7H is typically specified for ASME pressure vessel applications.

 

What are the key physical properties of Grade 7 sheet?

A:

Density: 4.51 g/cm³ (40% lighter than steel)

Melting point: ~1665°C

Elastic modulus: 105 GPa

Thermal conductivity: 21.9 W/m·K

Magnetic: Non-magnetic

Electrical resistivity: 0.55 µΩ·m

 

What environments is Grade 7 specifically designed for?

A: Grade 7 excels in:

Dilute hydrochloric acid (HCl) - up to 5% boiling

Dilute sulfuric acid (H₂SO₄) - up to 5% ambient, 1–2% boiling

Phosphoric acid (H₃PO₄) - up to 20% boiling

Hot seawater with crevice conditions (>70°C, tight gaps)

Flue gas desulfurization condensates (low pH, high chloride)

Geothermal brines (variable pH, high temperature)

 

Is Grade 7 immune to crevice corrosion?

A: Virtually yes. The critical crevice corrosion temperature for Grade 7 in seawater is >200°C - meaning no attack has been observed under any practical service condition. Grade 2, by comparison, has a critical crevice temperature of ~80°C.

 

Can Grade 7 handle ferric chloride and wet chlorine?

A: Yes. Grade 7 has the same excellent resistance as Grade 2 to oxidizing chlorides, ferric chloride, and wet chlorine gas. The palladium addition does not impair performance in oxidizing environments.

 

Our factory is a specialized titanium mill products manufacturing facility, fully dedicated to the production of seamless and welded pipe, tube, plate, sheet, strip, bar, wire, and custom profiles across the complete spectrum of commercially pure and alloy titanium grades - including Grade 2, Grade 5, Grade 7, Grade 9, Grade 12, Grade 23, and palladium/ruthenium-stabilized grades such as Grade 16, Grade 17, and Grade 26. Equipped with rotary piercing mills, cold pilger lines, continuous strip welding lines, hot and cold rolling mills, vacuum annealing furnaces, precision slitting lines, multi-pass wire drawing equipment, and press brake forming systems, we maintain 100% in-house control over every stage of production - from raw material inspection to final non-destructive testing. Our NDT laboratory is equipped with advanced multi-coil eddy current testers and immersion ultrasonic scanning systems, enabling full compliance with ASTM, ASME, AMS, and MIL standards. All products are supplied with full traceability and certified mill test reports, and our quality system is ISO 9001 certified. From high-volume industrial runs to custom-engineered solutions for aerospace, chemical processing, marine engineering, pharmaceutical, power generation, and medical implant applications, we deliver precision, reliability, and on-time performance to customers worldwide.

 

GNEE is a manufacturer specialising in the research, development, production, sales and service of titanium products such as titanium tubes, titanium rods, titanium sheets, titanium wires and titanium strips. Our company is located in Henan Province with convenient traffic. Our factory has been engaged in foreign markets for more than 18 years and has rich production experience. Our main markets are Dubai, Indonesia, Singapore, Vietnam, Malaysia, Philippines, Chile, Mexico, Israel, Spain and so on.
 

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