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If the product you are looking for is not in stock, we are here to help! Through our extensive network of suppliers, we can source almost any alloy or material, in any form and dimension.
Let’s find exactly what you came for
If the product you are looking for is not in stock, we are here to help! Through our extensive network of suppliers, we can source almost any alloy or material, in any form and dimension.
Let’s find exactly what you came for
If the product you are looking for is not in stock, we are here to help! Through our extensive network of suppliers, we can source almost any alloy or material, in any form and dimension.
Let’s find exactly what you came for
If the product you are looking for is not in stock, we are here to help! Through our extensive network of suppliers, we can source almost any alloy or material, in any form and dimension.
Let’s find exactly what you came for
If the product you are looking for is not in stock, we are here to help! Through our extensive network of suppliers, we can source almost any alloy or material, in any form and dimension.
Titanium Grade 7 is a commercially pure titanium based on Grade 2, alloyed with palladium (~0.12–0.25%) to provide superior corrosion resistance – especially in strongly reducing acids such as hydrochloric and sulfuric acid. It is a first choice in the chemical process industry, chlor-alkali production and advanced environmental technology, where the combination of acid resistance, low weight and formability is crucial.
The recommended filler material for welding is Titanium AWS A5.16-90 ERTi-7.
General material description:
Type: Commercially pure titanium (based on Grade 2) with ~0.12–0.25% Pd addition
Structure: HCP structure (hexagonal close-packed)
Developed for: Combining low weight and good formability with extreme acid resistance
Alternative names: Titanium Grade 7, CP Titanium Grade 7, UNS R52400, Werkstoffnr 3.7235, ASTM B348
Key benefits:
Extreme corrosion resistance in reductive acids (e.g. hydrochloric acid, sulfuric acid)
Retains all the advantages of Grade 2 – low weight, formability, weldability
Withstands hydrogen-generating environments without hydrogen-induced embrittlement
Passive film capability is enhanced by Pd – oxide film self-heals even in reducing environments
Biocompatible – can be used in certain medical and environmental applications
Disadvantages / Limitations:
More expensive than Grade 2 due to the palladium addition
Lower strength than Grade 5 – not for highly stressed components
Not suitable in environments with strong hydrofluoric acid (HF)
Applications by industry and value:
Chemical process industry: Pipes, tanks, pumps – hydrochloric acid/sulfuric acid resistance
Chlor-alkali / Chlorine production: Electrolytic cells, anode chambers
Environment / Wastewater treatment plants: Waste treatment, acid neutralization – chemical resistance
Energy / Cooling systems: Heat exchangers – combination of corrosion resistance and low weight
Marine / Offshore: Components in mixed corrosive environments – withstands chlorides + acids
General corrosion description:
Passive oxide film is improved by palladium – self-healing also occurs in reducing environments
Resists strong acids that normally attack pure titanium (e.g. hot HCl)
Not sensitive to hydrogen-induced embrittlement or stress corrosion
Corrosion environments where the material works well:
Hot hydrochloric acid, sulfuric acid (also >10–15% HCl at high temp)
Chlorides, salt water and brackish water
Mixed acids, hydrogen-evolving process fluids
Wet oxidizing and reductive acids in changing environments
Corrosion environments where the material should Avoid:
Hydrofluoric acid (HF) – also attacks palladium-alloyed titanium
Fusing salts or very strong oxidizing acids without liquid
Standing solutions with low oxygen content and high chloride pressure in crevices
Technical material properties (annealed condition):
Property (Typical value)
Yield strength (0.2%): ~275–350 MPa
Tensile strength: ~480–550 MPa
Elongation at break: ~20–30%
Density: ~4.51 g/cm³
Elastic modulus: ~105 GPa
Thermal conductivity: ~17 W/m·K
Operating temperature: Rec. ≤ 400°C (briefly up to ~500°C)
Weldability: Very good – inert gas atmosphere required
Machinability: Good – similar to Grade 2, requires robust tools
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