Do you know what is the difference between Titanium grade 7 and grade 11 plate?
Titanium-Grade 11 (3.7225), R52550
Titanium-Grade 7 (3.7235), R52400
When we talk about titanium-palladium alloys, our first reaction is usually GR7, but GR11 is also a titanium-palladium alloy. So what is the difference between the two of them? Let's take a look at the following answers:
Products Description
Grade 7 titanium is equivalent to Grade 2 titanium on mechanically and physically, except that the interstitial element palladium is added to make it to be an alloy. Grade7 alloy has excellent weldability and texture, and with the best corrosion resistance in all of titanium grades. In fact, it is most resistant to corrosion when reducing acid.
Grade7 titanium commonly used in chemical processes and production equipment components.
Grade 11 titanium is very similar to Grade 1, except that a small amount of palladium is added to enhance corrosion resistance, making it to be an alloy. This corrosion resistance is useful to prevent crack erosion and reduce the acid in the chloride environment.
Other useful properties include optimal ductility, cold formability, useful strength, impact toughness and excellent weldability. This alloy can be used in the same applications as Grade1 titanium, especially in corrosion issues such as:
* Chemical treatment
* Chlorate manufacturing
* Desalination
* Marine applications
Products Description
Grade 2 titanium is the most widely used commercially available pure titanium. Grade 1 titanium is currently the purest commercially available titanium. Grade 2 and Grade 1 pure titanium have the same corrosion resistance.
Grade 11 pure titanium is very similar to Grade 1 pure titanium, the difference being the addition of a small amount of palladium to enhance its corrosion resistance.
On the other hand, Grade 7 pure titanium is essentially a "microalloy" of Grade 2 titanium, containing approximately 0.12-0.25% palladium, making it the most corrosion-resistant of all titanium alloys.
The difference of chemical composition of GR7 and GR11 titanium alloys
| Element | Grade 7 (Gr. 7 / TA9) | Grade 11 (Gr. 11 / TA9-1) | Significance of the Difference |
|---|---|---|---|
| Palladium (Pd) | 0.12 - 0.25% | 0.12 - 0.25% | Identical. This is the key alloying element that defines both grades. |
| Iron (Fe) - Max | 0.30% | 0.20% | This is the critical difference. Gr. 11 has a stricter, lower limit on iron. |
| Oxygen (O) - Max | 0.25% | 0.18% | Gr. 11 also has a slightly lower oxygen limit, contributing to higher purity. |
| Titanium (Ti) | Balance | Balance | Balance in both. |
| Other Elements (each) | 0.1% max | 0.1% max | Similar restrictions on other impurities. |
The main applications of GR11 and GR7 titanium alloys:
GR11 and GR7 alloys are mainly used in the environment of dilute hydrochloric acid, dilute sulfuric acid, and dilute nitric acid. They are also widely used in titanium equipment to prevent crevice corrosion. For example, tubular heat exchangers made of GR11 and GR7 alloys used in dilute hydrochloric acid, sulfuric acid, and nitric acid environments are used as spinnerets and other parts in the textile industry, and titanium equipment flanges are manufactured in large quantities in acetaldehyde devices. Lining rings and diamond gaskets, etc., GR11 and GR7 are also used in other devices to make flanges and joints and other parts with gaps.
about us
We are a leading manufacturer and exporter specializing in Titanium and Titanium Alloy products. Our company is dedicated to providing a comprehensive range of high-quality titanium solutions for demanding global industries such as Aerospace, Chemical Processing, Medical, Marine Engineering, Power Generation, and Sports Equipment.
Our core export portfolio encompasses the full spectrum of wrought titanium products, including:
Titanium Tubes & Pipes: From precision Thin-Walled Titanium Tubes for heat exchangers to robust Thick-Walled Titanium Pipes for high-pressure applications.
Titanium Plates & Sheets: Supplied as Titanium Plates for heavy-duty construction and Titanium Sheets / Titanium Foils for precise manufacturing.
Titanium Bars & Rods: We supply Titanium Bars, Titanium Rods, and Titanium Wires in various diameters and finishes.
Titanium Fasteners: A complete range of Titanium Fasteners including bolts, nuts, and studs.
We expertly process all common grades to meet diverse operational requirements, including:
Commercially Pure Titanium: Gr1, Gr2
Titanium Alloys: Gr5 (Ti-6Al-4V), Gr7, Gr9 (Ti-3Al-2.5V), Gr12
Our production and quality assurance strictly adhere to international standards such as ASTM B265, ASTM B337, ASTM B338, ASTM B348, ASME SB-363, and AMS 4902, ensuring superior performance, excellent corrosion resistance, and high strength-to-weight ratio in every product.
Leveraging our advanced manufacturing expertise and stringent quality control, we are your trusted global partner for reliable, high-performance titanium materials.
