Medical and Industrial Grades Titanium
Titanium is a strong, lightweight and modern alloy with the highest strength-to-density ratio found in any metal. It has high yield-strength and is quite ductiy, especially in an oxygen-free environment. Pure titanium has a ultimate tensile strength of roughly 400 Mpa (63 ksi) which is equal to common, low-grade steel alloys. Therefore other elements like aluminum are added to improve mechanical properties , and some titanium alloys can reach strengths up to 1400 Mpa (200 ksi). The high yield-strength and low density / weight make titanium ideal for aerospace application.
Titanium has excellent corrosion resistance properties and similar to steel, the titanium on the surface binds to oxides creating a passivation layer of titanium-oxide which is ceramic, preventing further corrosion from occuring. Titanium can withstand acidic-attacks of diluted sulphites and hydrochloric acid, chlorine solutions and most non-concentrated organic acids. Moreover titanium is considered the most biocompatable material available at the moment, as it is not harmful or toxic to living tissue and does not corrode from bodily fluids due to the abovementioned corrosion resistance properties. Further, it also shows good binding properties with bones which is why titanium is commonly used as an implant for replacing bone-structures by medical personnel, and this medical grade is the so-called ELI grade (grade 23) which stands for “Extra Low Interstitial” per AMS4930 or AMS4931. In this grade the maximum oxygen content is lower giving the material improved fracture toughness.
Titanium was first numbered in grades as defined by the ASTM B-265 (American Society for Testing and Materials) and classified by it’s distinct micro-structural shape (α, β or α+β phases). Gradually other institutes for standards, as well as many OEM’s for gas- & aircraft turbines have also issued their own standards either matching with the ASTM grades or alternatively adjusting the chemical composition and heat treatments to achieve the desired properties for their application.
Alloy-Search offers a selected range of titanium grades according to numerous industry specifications:
| Trade Name | DIN | EN-ISO | UNS | BS | ASTM | SAE-AMS | AFNOR | ASME | JIS | OEM / Other | Remark |
| Ti-6Al-4V | 3.7164 3.7165 | 5832-3 | R56400 R56401 R56407 | TA10 TA11 TA12 TA13 TA56 TA59 | B-265 B-348 B-381 F-136 F-1472 | AMS 4907 AMS 4911 AMS 4928 AMS 4930 AMS 4931 AMS 4965 AMS 4967 AMS 6930 AMS 6931 AMS 6932 | T-A6V T-A6VE AIR:9183 | SB-265 SB-348 SB-381 | H 4600: Class 60 Class 60E | MSRR8610 MSRR8614 MSRR8652 Ti6Al4V 6Al-4V-ELI | Available in grades: – Grade 5 – Grade 23 – Grade ELI |
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