ASTM B348-Titanium and Titanium Alloy Bars and Billets.
ASTM B348
Titanium and Titanium Alloy Bars and Billets
ASTM B348 is a standard developed by ASTM International that specifies the requirements for titanium and titanium alloy bars, billets, forgings, and rings. The standard covers six grades of titanium and titanium alloys, which are designated by their unique grade number.
It covers the chemical composition, mechanical properties, and heat treatment requirements for each grade of titanium, as well as the required testing methods for determining compliance with the standard.
It also covers the tolerance for dimensions and shape, the acceptable surface finish and the packaging and marking requirements for the products.
It is primarily intended for use in aerospace, medical, and industrial applications where high strength, low weight, and corrosion resistance are required.
Chemical Composition
Composition, %
Grade
UNS NO.
Carbon, max
Oxygen, max
Nitrogen, max
Hydrogen,B,C max
Iron, max
Aluminum
Vanadium
Palladium
Ruthenium
Nickel
Molybdenum
Chromium
Cobalt
Zirconium
Niobium
Tin
Silicon
Other Elements,,max.each
Other Elements,max total
Titanium G
Grade 1
UNS R50250
0.08
0.18
0.03
0.015
0.20
...
...
...
...
...
...
...
...
...
...
...
0.1
0.4
balance
Grade 2
UNS R50400
0.08
0.25
0.03
0.015
0.30
...
...
...
...
...
...
...
...
...
...
...
0.1
0.4
balance
Grade 3
UNS R50550
0.08
0.35
0.05
0.015
0.30
...
...
...
...
...
...
...
...
...
...
...
0.1
0.4
balance
Grade 4
UNS R50700
0.08
0.40
0.05
0.015
0.50
...
...
...
...
...
...
...
...
...
...
...
0.1
0.4
balance
Grade 5
UNS R56400
0.08
0.20
0.05
0.015
0.40
5.5-6.75
3.5-4.5
...
...
...
...
...
...
...
...
...
0.1
0.4
balance
Grade 9
UNS R56320
0.08
0.15
0.015
0.015
0.25
2.5-3.5
2.0-3.0
...
...
...
...
...
...
...
...
...
0.1
0.4
balance
Grade23
UNS R56407
0.08
0.13
0.03
0.0125
0.25
5.5-6.5
3.5-4.5
...
...
...
...
...
...
...
...
0.1
0.4
balance
Mechanical Properties
Grade
Tensile Strength, min
Yield Strength (0.2 % Offset) min or range
Elongation in 4D, min, %
Reduction of Area, min %
KSI
MPa
KSI
MPa
1
35
240
20
138
24
30
2
50
345
40
275
20
30
3
65
450
55
380
18
30
4
80
550
70
483
15
25
5
130
895
120
828
10
25
9
90
620
70
483
15
25
23
120
828
110
759
10
15
Permissible Variations in Product Analysis
Element
Product Analysis Limits, max or Range, %
Permissible Variation in Product Analysis
Aluminum
0.5 to 2.5
±0.20
Aluminum
2.5 to 6.75
±0.40
Carbon
0.10
＋0.02
Chromium
0.1 to 0.2
±0.02
Chromium
5.5 to 6.5
±0.30
Cobalt
0.2 to 0.8
±0.05
Hydrogen
0.02
＋0.002
Iron
0.80
+0.15
Iron
1.20 to 1.8
±0.20
Molybdenum
0.20 to 0.4
±0.03
Molybdenum
0.60 to 1.2
±0.15
Molybdenum
1.50 to 4.5
±0.20
Molybdenum
14.0 to 16.0
±0.50
Nickel
0.3 to 0.9
±0.05
Niobium
2.20 to 3.2
±0.15
Niobium
>30
±0.50
Nitrogen
0.05
＋0.02
Oxygen
0.30
＋0.03
Oxygen
0.31 to 0.4
±0.04
Palladium
0.01 to 0.02
±0.002
Palladium
0.04 to 0.08
±0.005
Palladium
0.12 to 0.25
±0.02
Ruthenium
0.02 to 0.04
±0.005
Ruthenium
0.04 to 0.06
±0.005
Ruthenium
0.08 to 0.14
±0.01
Silicon
0.06 to 0.40
±0.02
Tin
0.62.0 to 3.0
±0.15
Vanadium
0.6 to 4.5
±0.15
Vanadium
7.5 to 8.5
±0.40
Zirconium
0.6 to 1.4
±0.15
ResidualsA (each)
0.15
＋0.02
Permissible Variations in Size for Titanium Bars—Hot-Worked Rounds and Squares
Inquire Us
EN
English
日本語
한국어
Español
عربى
русский
Deutsch
中文简体
