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