Valves Material Comparison

During vendor bids evaluation of the valve package, usually we will face the problem of material review from the Vendor offer. Let’s say we require a valve with A182 F53 Duplex stainless steel trim material, but the Vendor offer different material such as A182 F51 Duplex stainless steel. To accept or not this Vendor offer will be a problematic issue for an instrument engineer. In this case, just contact the material engineer and ask them whether vendor offer is acceptable or not.
However, as a general guideline, the following table could be used just to compare the superiority of one material to other material. Use the table with below notes as a general guideline.

Notes:
1.       Alloys containing chromium get their corrosion resistance from a passive oxide layer on their surface, which acts as a barrier to further oxidation or corrosion.
2.       Corrosion resistance can also be enhanced by increasing the amount of nickel.
3.       PREN (Pitting Resistance Equivalent Number), developed to reflect and predict the pitting resistance of a corrosion resistance alloy, based upon the proportions of Cr, Mo, W and N in the chemical composition of the alloy. Higher value of PREN provides higher pitting corrosion resistance. (Refer to NACE MR 01751).
4.       Tensile strength & Yield strength is useful to compare the material in term of the strength and ductility of the material.
5.       Tensile strength is the maximum stress that a material can withstand while being stretched or pulled before failing or breaking.
6.       Yield strength is the stress a material can withstand without permanent deformation.
7.       Precipitation hardening, also called age hardening, is a heat treatment technique used to increase the yield strength of malleable materials, including most structural alloys of aluminium, magnesium, nickel, titanium, and some stainless steels.

SCROLL OUT BELOW!





































Material
UNS No.
Cr (%), max
Ni (%), max
PREN
Tensile Strength, min
Yield Strength, min
Hardness, HB, max
Remark
Carbon Steel




ksi [Mpa]
ksi [Mpa]
HB

A105N
-
0.3
0.4
-
70 [485]
36 [250]
187
Forging
A216 WCB
J03002
0.5
0.5
-
70 to 95 [485 to 655]
36 [250]
-
Casting
A216 WCC
J02503
0.5
0.5
-
70 to 95 [485 to 655]
40 [275]
-
Casting
Low temperature Carbon steel








A350 LF2
-
0.3
0.4
-
70 to 95 [485 to 655]
36 [250]
197
Forging
A350 LF3
-
0.30 max
3.3–3.7
-
70–95 [485–655]
37.5 [260]
197
Forging
A352 LCB
J03003
0.5
-
-
65 to 90 [450 to 620]
35 [240]
-
Casting
A352 LCC
J02505
0.5
-
-
70 to 95 [485 to 655]
40 [275]
-
Casting
Low alloy steel








A1031 AISI 4140
4140
0.80–1.10
-
-
-
-
-
-
A694 F65
-
-
-
-
77 [530]
65 [450]
-
-
A694 F52
-
-
-
-
66 [455]
52 [360]
-
-
A694 F60
-
-
-
-
75 [515]
60 [415]
-
-
Martensitic Stainless Steel








A182 F6A  (13 % chromium)
S41000
11.5–13.5
0.5
-
70 [485]
40 [275]
143–207
Forging
A182 F6NM (13 % chromium, 4 % nickel)
S41500
11.5–14.0
3.5–5.5
-
115 [790]
90 [620]
45
Forging
A217 CA15
J91150
11.5–14.0
1
-
90 to 115 [620 to 795
65 [450]
-
Casting
A487 CA6NM
-
11.5–14.0
3.5–4.5
-
100 [690]
75 [515]
255
Casting
Austenitic Stainless Steel








A182 F316
S31600
16.0–18.0
10.0–14.0
23 to 28
75 [515]
30 [205]
-
Forging
A182 F316L
S31603
16.0–18.0
10.0–15.0
23 to 28
70 [485]
25 [170]
-
Forging
A182 F316LN-Mod.
S31653
16.0–18.0
11.0–14.0
-
75 [515]
30 [205]
-
Forging
A182 F347
S34700
17.0–20.0
9.0–13.0
17 to 19
75 [515]
30 [205]
-
Forging
A182 F44 (6% Mo) 254 Smo
S31254
19.5–20.5
17.5–18.5
42 to 45
94 [650]
44 [300]
-
Forging
A182 FXM-19 (Nitronic 50)
S20910
20.5–23.5
11.5–13.5
29 to 38
100 [690]
55 [380]
-
Forging
A351 CF8M (316 SS)
J92900
18.0-21.0
9.0-12.0
24 to 31
70 [485]
30 [205]
-
Casting
A351 CF3 (304)
J92700
17.0-21.0
8.0-12.0
17 to 21
70 [485]
30 [205]
-
Casting
A351 CF3M (316L SS)
J92800
17.0-21.0
9.0-13.0
24 to 31
70 [485]
30 [205]
-
Casting
Precipitation Hardening Stainless Steel








A564 Gr 630 H1150M (17-4 PH)
S17400
15.0-17.5
3.0-5.0
-
115 [795]
75 [520]
255
Precipitation Hardening
Duplex Stainless Steel








A182 F51
S31803
21.0-23.0
4.5-6.5
31.38
90 [620]
65 [450]
-
Forging
A182 F53
S31750
24.0–26.0
6.0–8.0
-
116 [800]
80 [550]
310 max
Forging
A182 F55
S31760
24.0–26.0
6.0–8.0
-
109 to 130 [750 to 895]
80 [550]
-
Forging
A890-4A
J92205
21.0–23.5
4.5–6.5
-
90 [620]
60 [415]
-
Casting
A890-6A
J93380
24.0–26.0
6.5–8.5
38 to 46
100 [690]
65 [450]
-
Casting
Nickel Alloys








B564 Incoloy 825
N08825
19.5–23.5
38.0–46.0
-
85 (586)
35 (241)
-
Forging
B805 Incoloy 925
N09925
19.5-22.5
42.0-46.0
-
75 (517)
35 (241)
-
Precipitation Hardening
B564 Inconel 625
N06625
20.0–23.0
58
-
120 (827)
60 (414)
-
Forging
B670 Inconel 718
N07718
17.0-21.0
50.0-55.0
-
180 (1241)
150 (1034)
-
Precipitation Hardening
B637 Inconel 750
N07750
14.00–17.00
70.00 min
-
140 (965)
90 (620)
262 min
Precipitation Hardening
B564 Monel 400
N04400
-
63.0 min
-
70 (483)
25 (172)
-
Forging
B865 Monel K500
N05500
-
63.0 min
-
140 (965)
100 (690)
245
Precipitation Hardening

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