ASTM B 338 / ASME SB338 / Seamless and Welded Titanium and Titanium Alloy Tubes for Condensers and Heat Exchanges supplier & distributor in India

ASTM B338 SPECIFICATION FOR SEAMLESS AND WELDED TITANIUM AND TITANIUM ALLOY TUBES FOR CONDENSERS AND HEAT EXCHANGERS

1.Scope

1.1 This specification defines the requirements for 13grades of titanium anf tianium alloy tubing intended for surface condensers, evaporators, and heat exchange as follows:
1.1.1 Grade 1 - Unalloyed titanium,
1.1.2 Grade 2 - Unalloyed titanium,
1.1.3 Grade 3 - Unalloyed titanium,
1.1.4 Grade 7 - Unalloyed titanium plus 0.12 to 0.25? palladium,
1.1.5 Grade 9 - titanium alloy (3? aluminum, 2.5? vanadium)
1.1.6 Grade 11- Unalloyed titanium plus 0.12 to 0.25? palladium,
1.1.7 Grade 12 - Titanium alloy (0.3? molybdenum, 0.8? nickel),
1.1.8 Grade 13 - Titanium alloy (0.5? nickel, 0.05? rethnium),
1.1.9 Grade 14 - Titanium alloy (0.5? nickel, 0.05? rethnium),
1.1.10 Grade 15 - Titanium alloy (0.5? nickel, 0.05? rethnium),
1.1.11 Grade 16 - Unalloyed titanium plus 0.04 to 0.08? palladium),
1.1.12 Grade 17 - Unalloyed titanium plus 0.04 to 0.08? palladium, and
1.1.13 Grade 18 - tianium alloy (3? aluminum, 2.5? vanadium) plus 0.04? to 0.08? palladium.

1.2 Tubing converd by this specification shall be heat treated by at least a stress relisf as definsd in 5.3.

1.3 The values stated in inch-pound units are to be regarded as the stndard. The values given in parentheses are for information only.

TABLE1 CHEMICAL REQUREMENTSA

Element	Composition, %
	Grade
	1	2	3	7	9	11	12
Nitrogen, max	0.03	0.03	0.05	0.03	0.02	0.03	0.03
Carbon, max	0.10	0.10	0.10	0.10	0.10	0.10	0.08
Hydrogen,B,C	0.015	0.015	0.015	0.015	0.015	0.015	0.015
Iron, max	0.20	0.30	0.30	0.30	0.25	0.20	0.30
Oxygen, max	0.18	0.25	0.35	0.25	0.15	0.18	0.25
Aluminum	...	...	...	...	2.5 to 3.5	...	...
Vanadium	...	...	...	...	2.0 to 3.0	...	...
Ruthenium	...	...	...	...	...	...	...
Palladium	...	...	...	0.12 to 0.25	...	0.12 to 0.25	...
Molybdenum	...	...	...	...	...	...	0.2 to 0.4
Nickel	...	...	...	...	...	...	0.6 to 0.9
ResidualsD,E,F(each), max	0.1	0.1	0.1	0.1	0.1	0.1	0.1
ResidualsD,E,F(each), max	0.4	0.4	0.4	0.4	0.4	0.4	0.4
TitaniumG	remainder	remainder	remainder	remainder	remainder	remainder	remainder
Element	Composition, %A
	Grade
	13	14	15	16	17	18
Nitrogen, max	0.03	0.03	0.05	0.03	0.03	0.02
Carbon, max	0.10	0.10	0.10	0.10	0.10	0.10
Hydrogen	0.015	0.015	0.015	0.015	0.015	0.015
Iron, max	0.20	0.30	0.30	0.30	0.20	0.30
Oxygen, max	0.10	0.15	0.25	0.25	0.18	0.15
Aluminum	...	...	...	...	...	2.5 to 3.5
Vanadium	...	...	...	...	...	2.0 to 3.0
Ruthenium	0.04 to 0.06	0.04 to 0.06	0.04 to 0.06	...	...	...
Palladium	...	...	...	0.04 to 0.08	0.04 to 0.08	0.04 to 0.08
Molybdenum	...	...	...	...	...	...
Nickel	0.40 to 0.60	0.40 to 0.60	0.49 to 0.60	...	...	...
ResidualsD,E,F(each), max	0.1	0.1	0.1	0.1	0.1	0.1
ResidualsD,E,F(each), max	0.4	0.4	0.4	0.4	0.4	0.4
TitaniumG	remainder	remainder	remainder	remainder	remainder	remainder

Analysis shall be completed for all elements listed in this table for each frade. The analysis results for the elements not qualified in the table need not be reported unless the concentration level is freater than 0.1% each or 0.4% total BLower hydrogen may be obtained by negotiation with the menufacturer. CFinal product analysis. DNeed not be reported. EA residual is an element present in a metal or alloy in small quantities and is ingerent to the manufacturing process but not added intentionally. In titanium these elemnents include aluminum, vanadium, tin, iron, chromium, molybdenum, niobium, zirconium, hafnium, bismuth, ruthenium, paalladium, yttrium, copper, silicon, cobalt, tantalum, nickel, boron, mangnese, and tungsten. FThe purchaser may, in his written purchase order, request analysis for specific residual elements not listed in this specification. The maximum allowable concentration for residual elements shall be 0.1% each and 0.4% maximum total. GThe percentage of titanium is determined by difference.

TABLE2 PERMISSIBLE VARIATIONS IN PRODUCT ANALYSIS

Element	%
Element	Maximum or Specified Range	Permissible Variation in Product Analysis
Nitogen	0.05	+0.02
Carbon	0.10	+0.02
Hydrogen	0.015	+0.002
Iron	0.35	+0.15
	0.30	+0.03
Oxygen	0.31 to 0.40	±0.04
Palladium	0.04 to 0.25	±0.02
Ruthenim	0.04 to 0.06	±0.005
Aluminum	2.5 to 3.5	±0.40
Vanadium	2.0 to 3.0	±0.15
Molybdenum	0.2 to 0.4	±0.03
Nickel	0.4 to 0.9	±0.05
ResidualsA(each)	0.1	+0.2

A residual is an element present in a metal or alloy in small quanities and is ingerent to the manufacturing process but not addedintentionally. In titanium these elements include aluminum, vanadium, tin, iron, chromium, molybdenum, niobium, zirconium,hafnium, bismuth, ruthenium, palladium, yttrium, copper, silicon, cobalt, tantalum, nickel, boron, manganese, and tungsten.

TABLE3 TENSILE REQUREMENTS

Grade	Tensile Strength, min		Yield Strength, 0.2% Offset Yield
	Tensile Strength, min		min		max		Elongation in 2 in. or 50mm,min,%
	ksi	MPa	ksi	MPa	ksi	MPa	Elongation in 2 in. or 50mm,min,%
1A	35	240	25	170	45	310	24
2A	50	345	40	275	65	450	20
3A	65	450	55	380	80	550	18
7A	50	345	40	275	65	450	20
9A	125	860	105	725	...	...	10
9A	90	620	70	485	...	...	15C
11A	35	240	25	170	45	310	24
12A	70	483	50	345	...	...	18C
13A	40	275	25	170	...	...	24
14A	60	410	40	275	...	...	20
15A	70	483	55	380	...	...	18
16A	50	345	40	275	65	450	20
17A	35	240	25	170	45	310	24
18A	125	860	105	725	...	...	10
18A	90	620	70	483	...	...	15C

Properties for material in the annealed condition. BProperties for cold-worked and sterss-relieved material. CElongation for welded tubing manufactured from continuously cold rolled and annelaed strip colils for Grade 6, 12 and 18 will be 12%.

TABLE4 FLARING REQUIREMENTS

Grade	Expansion of Inside Diameter, min, %
1	22
2	20
2	17
7	20
9A	20
11	22
12	17
13	22
14	20
15	17
16	20
17	22
18A	20

Annealed.

TABLE5 PERMISSIBLE VARIATION IN OUTSIDE DIMENSIONS BSED ON INDIVIDUAL MEASUREMENTS

Outside Diiameter, in.(mm)	Dimeter Tolerance, in.(mm)A	Permissible VariationsB in Wall Thickness,t, %
Under 1(25.4), excl	±0.04(±0.102)	10
1 to 1 1/2(25.4 to 38.1), excl	±0.05(±0.127)	10
1 1/2 to 2(38.1 to 50.8), exel	±0.06(±0.152)	10
2 to 2 1/2(50.8 to 63.5), excl	±0.07(±0.178)	10
2 1/2 to 3 1/8(63.5 to 88.9), excl	±0.010(±0.254)	10

these permissible variations in outside diameter apply only to tubes as finished at the mill vefore subsequent swanging, expananding, bending, polishing or other fabricating operations. BWhen minimum wall tubes are orderde, tolerances are all plus and shall be double the values shown.

TABLE6 STRAIGHTNESS

Length, ft(m)	Maximum Curvature Depth of Arc
Over 3 to 6 (0.91 to 1.83), incl	1/8 in.(3.2mm)
Over 6 to 8 (1.83 to 2.44), incl	3/16 in.(4.8mm)
Over 8 to 10 (2.44 to 3.05), incl	1/4 in. (6.4mm)
Over 10 (3.05)	1/4 in./any 10 ft (2.1mm/m)

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