A350 LF2 Ball Valve Specifications

Part Name	Body/Bonnet	Bolting	Stem	Ball	Seat	Spring
Material	ASTM A350 LF2	A320 L7M/ A194 7M	A182 F316	A350 LF2+ENP/ A182 F316	RPTFE, Devlon, PEEK, etc.	Inconel 725

A350 LF2 Ball Valve Test Pressure

Test Type	Test Fluid	Test Pressure (bar)
Test Type	Test Fluid	Class 150	Class 300	Class 600	Class 900	Class 1500	Class 2500
Shell Test	Water	29.4	77.7	153.2	229.8	383.0	638.3
High Pressure Seat Test	Water	21.6	56.3	112.3	168.5	280.9	468.1
Low Pressure Seat Test	Air	6	6	6	6	6	6

A350 LF2 Chemical Compositions

Element	Composition, wt. %
Carbon, max	0.30
Manganese	0.60-1.35
Phosphorus,max	0.035
Sulfur, max	0.040
Silicon^A	0.15-0.30
Nickel	0.40 max^B
Chromium	0.30 max^B,C
Molybdenum	0.12 max^B,C
Copper	0.40 max^B
Niobium^E	0.02 max^D
Vanadium	0.08 max
Nitrogen	...

^A When vacuum carbon-deoxidation is required by Supplementary Requirement S4, the silicon content shall be 0.12 % maximum.
^B The sum of copper, nickel, chromium, vanadium and molybdenum shall not exceed 1.00 % on heat analysis.
^C The sum of chromium and molybdenum shall not exceed 0.32 % on heat analysis.
^D By agreement, the limit for niobium (columbium) may be increased up to 0.05 % on heat analysis and 0.06 % on product analysis.
^ENiobium and columbium are interchangeable names for the same element and both names are acceptable for use in A01.22 specifications.

LF2 Tensile Properties at Room Temperature^A

	LF2 Classes 1 and 2
Tensile strength, ksi [MPa]	70-95 [485-655]
Yield strength, min, ksi [MPa]^B Elongation:	36 [250]
Standard round specimen, or small proportional specimen, min % in 4D gauge length	22
Strip specimen for wall thickness Vie in. [7.94 mm] and over and for all small sizes tested in full section; min % in 2 in. [50 mm]	30
Equation for calculating min elongation for strip specimens thinner than %e in. [7.94 mm]; min % in 2 in. [50 mm] t= actual thickness in inches	48f+ 15
Reduction of area, min, %c	30

^ASee 7.3 for hardness tests.
^B Determined by either the 0.2 % offset method or the 0.5 % extension under load method.For round specimens only.

A350 LF2 Working Pressures

Temperature, ℃	Working Pressures by Class, bar
Temperature, ℃	150	300	600	900	1500	2500	4500
-29 to 38	19.6	51.1	102.1	153.2	255.3	425.5	765.9
50	19.2	50.1	100.2	150.4	250.6	417.7	751.9
100	17.7	46.6	93.2	139.8	233.0	388.3	699.0
150	15.8	45.1	90.2	135.2	225.4	375.6	676.1
200	13.8	43.8	87.6	131.4	219.0	365.0	657.0
250	12.1	41.9	83.9	125.8	209.7	349.5	629.1
300	10.2	39.8	79.6	119.5	199.1	331.8	597.3
325	9.3	38.7	77.4	116.1	193.6	322.6	580.7
350	8.4	37.6	75.1	112.7	187.8	313.0	563.5
375	7.4	36.4	72.7	109.1	181.8	303.1	545.5
400	6.5	34.7	69.4	104.2	173.6	289.3	520.8
425	5.5	28.8	57.5	86.3	143.8	239.7	431.5
450	4.6	23.0	46.0	69.0	115.0	191.7	345.1
475	3.7	17.4	34.9	52.3	87.2	145.3	261.5
500	2.8	11.8	23.5	35.3	58.8	97.9	176.3
538	1.4	5.9	11.8	17.7	29.5	49.2	88.6

Charpy V-Notch Energy Requirements for Standard Size
[10 by 10 mm] Specimens

Grade	Minimum Impact Energy Required for Average of Each Set of Three Specimens, ft-lbf [J]	Minimum Impact Energy Permitted for One Specimen only of a Set, ft-lbf [J]
LF2, Class 1	15 [20]	12 [16]
LF2, Class 2	20 [27]	15 [20]