ASTM F136-Titanium-6Aluminum-4Vanadium ELI Alloy For Surgical Implants.- Changzhou Bokang Special Material Technology Co., Ltd

ASTM F136-Titanium-6Aluminum-4Vanadium ELI Alloy For Surgical Implants.

ASTM F136

Titanium-6Aluminum-4Vanadium ELI Alloy For Surgical Implants

ASTM F136 is a standard specification for wrought titanium-6Aluminum-4Vanadium ELI(Extra Low Interstitial) Alloy for surgical implant applications (UNS R56401). It covers the chemical, mechanical, and metallurgical requirements for wrought annealed titanium-6aluminum-4vanadium ELI (extra low interstitial) alloy (R56401) to be used in the manufacture of surgical implants. The products are classified into strips, sheets, plates, bars, forging bars, and wire. The heat analysis shall conform to the chemical composition requirements specified. Product analysis tolerances do not broaden the specified heat analysis requirements but cover variations between laboratories in the measurement of chemical content. Tension test and bend test shall be performed to meet the requirements specified.

Chemical Composition

Chemical requirements

Element	Composition,% (mass/mass)
Nitrogen (Maximum)	0.05
Carbon (Maximum)	0.08
Hydrogen (Maximum)	0.012
Iron (Maximum)	0.25
Oxygen (Maximum)	0.13
Aluminum	5.5-6.50
Vanadium	3.5-4.5
Titanium	balance

Analysis Tolerances

Element	Tolerance Under the Minimum or Over the Maximum Limit %(mass/mass)
Nitrogen	0.02
Carbon	0.02
Hydrogen	0.0020
Iron	0.10
Oxygen	0.02
Aluminum	0.40
Vanadium	0.15

Mechanical Properties

Annealed Mechanical Properties Of Bar, Wire, and Forgings

Diameter in(mm)	Tensile strength Min, psi (MPa)	Yield strength(0.2%,offset) Min, psi (MPa)	Elongation in 4D or 4W Min (%)			Reduction of Area Min (%)
Diameter in(mm)	Tensile strength Min, psi (MPa)	Yield strength(0.2%,offset) Min, psi (MPa)	L —	LT —	ST —	L —	LT —	ST —
<0.187 (<4.75mm)	125000(860)	115000(795)	10	...	...	...	...	...
0.187~1.75 (4.75~44.45mm)	125000(860)	115000(795)	10	...	...	25	...	...
>1.75~2.50 (44.45~63.50mm)	120000(825)	110000(760)	8	...	...	20	...	...
>2.50~4.00 (63.50~101.60mm)	120000(825)	110000(760)	8	8	8	15	15	15

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