API Trim Number

Nominal Trim

Trim code

Stem & othertrim parts

Disc/Wedge

Seat surface

Trim Material Grade

Service

1

410

F6

410 (13Cr)(200-275 HBN)

F6 (13Cr) (200 HBN)

410 (13Cr) (250 HBN min)

13Cr-0.75Ni-1Mn

For oil and oil vapors and general services with heat treated seats and wedges. General very low erosive or non-corrosive service between -100ºC and 320ºC. This stainless steel material lends itself readily to hardening by heat treatment and is excellent for contacting parts such as stems, gates, and discs. Steam, gas & general service to 370ºC. Oil & Oil vapor 480ºC.

2

304

304

304

304 (18Cr-8Ni)

304 (18Cr-8Ni)

19Cr-9.5Ni-2Mn-0.08C

For moderate pressure in corrosive, low erosive service between

-265ºC and 450ºC.

3

310

310

(25Cr-20Ni)

310 (25Cr-20Ni)

310 (25Cr-20Ni)

25Cr-20.5Ni-2Mn

For moderate pressure in corrosive or non corrosive service between

-265ºC and 450ºC.

4

410 - Hard

F6H

410 (13Cr)(200-275 HBN)

F6 (13Cr) (200-275 HBN)

F6 (13Cr) (275 HBN min)

13Cr-0.75Ni-1Mn

Seats 275 BHN min. As trim 1 but for medium pressure and more corrosive service.

5

410 - Full Hard faced

F6HF

410 (13Cr)(200-275 HBN)

F6+St Gr6 (CoCrAlloy) (350 HBNmin)

410+St Gr6 (CoCr Alloy)(350 HBN min)

13Cr-0.5Ni-1Mn/Co-Cr-A

High pressure slightly erosive and corrosive service between -265ºC and 650ºC and higher pressure. Premium trim service to 650ºC. Excellent for high pressure water and steam service.

5a

410 - Full Hard faced

F6HF

410 (13Cr)(200-275 HBN)

F6+Hardf. NiCr Alloy (350 HBN min)

410+Hardf. NiCr Alloy (350 HBN min)

13Cr-0.5Ni-1Mn/Co-Cr-A

As trim 5 whereCo is not allowed.

6

410 and Ni-Cu

F6HFS

410 (13Cr)(200-275 HBN)

Monel 400® (NiCu Alloy) (250 HBN min)

Monel 400® (NiCu Alloy)(175 HBN min)

13Cr-0.5Ni-1Mn/Ni-Cu

As trim 1 and more corrosive service.

7

410 - Very hard

F6HF+

410 (13Cr)(200-275 HBN)

F6 (13Cr) (250 HBN min)

F6 (13Cr) (750 HB)

13Cr-0.5Ni-1M0/13Cr-0.5Ni-1Mo

Seats 750 BHN min. As trim 1 but for higher pressure and more corrosive/erosive service.

8

410 - Hard faced

F6HFS

410 (13Cr)(200-275 HBN)

410 (13Cr) (250 HBN min)

410+St Gr6 (CoCr Alloy)(350 HBN min)

13Cr-0.75Ni-1Mn/1/2Co-Cr-A

Universal trim for general service requiring long service life up to 593ºC. As trim 5 for moderate pressure and more corrosive service. Steam,

gas & general service to 540ºC. Standard trim for gate valves.

8a

410 - Hard faced

F6HFS

410 (13Cr)(200-275 HBN)

F6 (13Cr) (250 HBN min)

410+Hardf. NiCr Alloy (350 HBN min)

13Cr-0.75Ni-1Mn/1/2Co-Cr-A

As trim5a for moderate pressure and more corrosive service

9

Monel

Monel

Monel® (NiCuAlloy)

Monel 400® (NiCu Alloy)

Monel 400® (NiCu Alloy)

70Ni-30Cu

For corrosive service to 450ºC such as acids, alkalies, salt solutions, etc. Very corrosive fluids. Erosive-corrosive service between -240ºC and 480ºC. Resistant to sea water, acids, alkalies.

Has excellent corrosion resistance in chlorine and alkylation service.

10

316

316

316 (18Cr-Ni-Mo)

316 (18Cr-Ni-Mo)

316 (18Cr-Ni-Mo)

18Cr-12Ni-2.5Mo-2Mn

For superior resistance to corrosion for liquids and gases which are corrosive to 410 stainless steel up to 455ºC. As trim 2 but a higher level of corrosive service. Provides excellent resistance to corrosive media at high temperatures and toughness for service at low temperatures. Low temperature service standard for 316SSvalves.

11

Monel - Hard faced

MonelHFS

Monel® (NiCuAlloy)

Monel 400® (NiCu Alloy)

Monel 400®+St Gr6 (350HBN min)

70Ni-30Cu/1/2Co-Cr-A

As trim 9 but for medium pressure and more corrosive service.

11a

Monel - Hard faced

MonelHFS

Monel® (NiCuAlloy)

Monel 400® (NiCu Alloy)

Monel 400®+HF NiCrAlloy (350 HBN min)

70Ni-30Cu/1/2Co-Cr-A

As trim 9 but for medium pressure and more corrosive service.

12

316 - Hard faced

316HFS

316 (Cr-Ni-Mo)

316 (18Cr-8Ni-Mo)

316+St Gr6 (350 HBN min)

18Cr-12Ni-2.5Mo-2Mn1/2Co-Cr-A

As trim 10 but for medium pressure and more corrosive service.

12a

316 - Hard faced

316HFS

316 (Cr-Ni-Mo)

316 (18Cr-8Ni-Mo)

316 Hardf. NiCr Alloy (350 HBN min)

18Cr-12Ni-2.5Mo-2Mn1/2Co-Cr-A

As trim 10 but for medium pressure and more corrosive service.

13

Alloy 20

Alloy 20

Alloy 20 (19Cr-29Ni)

Alloy 20 (19Cr-29Ni)

Alloy 20 (19Cr-29Ni)

29Ni-19Cr-2.5Mo-0.07C

Very corrosive service. For moderate pressure between -45ºC and 320ºC.

14

Alloy 20 - Hard faced

Alloy 20HFS

Alloy 20 (19Cr-29Ni)

Alloy 20 (19Cr-29Ni)

Alloy 20 St Gr6 (350 HBN min)

29Ni-19Cr-2.5Mo-0.07C/1/2Co-Cr-A

As trim 13 but for medium pressure and more corrosive service.

14a

Alloy 20 - Hard faced

Alloy 20HFS

Alloy 20 (19Cr-29Ni)

Alloy 20 (19Cr-29Ni)

Alloy 20 Hardf. NiCr Alloy (350 HBN min)

29Ni-19Cr-2.5Mo-0.07C/1/2Co-Cr-A

As trim 13 but for medium pressure and more corrosive service.

15

304 - Full Hard faced

304-HF

304 (18Cr-8Ni-Mo)

304St Gr6

304+St Gr6 (350 HBN min)

19Cr-9.5Ni-2Mn-0.08C/1/2Co-Cr-A

As trim 2 but more erosive service & higher pressure.

16

316 - Full Hard faced

316-HF

316 HF (18Cr-8Ni-Mo)

316+St Gr6 (320 HBN min)

316+St Gr6 (350 HBN min)

18Cr-12Ni-2.5Mo-2Mn/Co-Cr-Mo

As trim 10 but more erosive service & higher pressure.

17

347 - Full Hard faced

347-HF

347 HF (18Cr-10Ni-Cb)

347+St Gr6 (350 HBN min)

347+St Gr6 (350 HBN min)

18Cr-10Ni-Cb/Co-Cr-A

As trim 13 but more corrosive service & higher pressure. Combines good corrosion resistance with high temperature resistance up to 800ºC.

18

Alloy 20 - Full Hard faced

Alloy 20 HF

Alloy 20 (19Cr-29Ni)

Alloy 20+St Gr6 (350 HBN min)

Alloy 20+St Gr6 (350 HBN min)

19Cr-29Ni/Co-Cr-A

As trim 13 but more corrosive service & higher pressure. Water, gas or low pressure steam to 230ºC.

Special

Bronze

Bronze

410 (CR13)

Bronze

Bronze

Water, oil, gas, or low pressure steam to 232ºC.

Special

Alloy 625

Alloy 625

Alloy 625

Alloy 625

Alloy 625

NACE

Specially treated 316 or 410 trim combined optionally with B7M boltsand 2HM nuts to meet NACE MR-01-75 requirements.

Full Stellite

Full Hardfaced trim, suitable for abrasive & severe services up to 1200ºF (650ºC).