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Valve material and valve standards-(9)- general valve & parts materials

General valve material
The internal material combination specified by API600 for general valve material:

Stem material types hardness sealing surface
seal part no., material type hardness
13Cr 200-275 1 13Cr ≥HB250
4 13Cr ≥HB750
5 or 5A HF ≥HB350
6 13Cr/NiCu ≥HB750/≥HB175
7 13Cr/13Cr ≥HB250/≥HB750
8-8A 13Cr/HF ≥HB250/≥HB350
18Cr-8Ni no require 2 18Cr-8Ni no require
25Cr-20Ni 3 25Cr-20Ni
Nickel copper alloy 9 Nickel copper alloy
11 or 11A Nickel copper alloy/HF no require/≥HB350
18Cr-8Ni-Mo 10 18Cr-8Ni-Mo no require
12 or 12A 18Cr-8Ni-Mo/HF no require/≥HB350
19Cr-29Ni 13 19Cr-29Ni/HF no require
14 or 14A 19Cr-29Ni/HF no require/≥HB350

Commonly used valve trim material combination:

valve stem sealing surface valve stem sealing surface
13Cr 13Cr/13Cr 321 321/321
13Cr 13Cr/STL 321 321/STL
13Cr STL/STL 321 STL/STL
13Cr 13ZCr/Monel 1Cr18Ni9Ti 1Cr18Ni9Ti/1Cr18Ni9Ti
17-4PH STL/STL 1Cr18Ni9Ti 1Cr18Ni9Ti/STL
17-4PH 17-4PH/17-4PH 1Cr18Ni9Ti STL/STL
Monel Monel/Monel 1Cr18Ni12Mo2Ti 1Cr18Ni12Mo2Ti/1Cr18Ni12Mo2Ti
304 304/304 1Cr18Ni12Mo2Ti 1Cr18Ni12Mo2Ti/STL
304 304/STL 1Cr18Ni12Mo2Ti STL/STL
304 STL/STL 20 Alloy 20alloy/20alloy
316 316/316 Hastelloy B Hastelloy B/Hastelloy B
316 316/STL Hastelloy C Hastelloy C/Hastelloy C
316 STL/STL F51 F51/F51
304L 304L/304L F51 F51/STL
304L 304L/STL 38CrMoALA STL/STL
304L STL/STL 25Cr2MoIV A STL/STL
316L 316L/316L 4Cr10Si2Mo STL/STL
316L 316L/STL 4Cr14Ni14W2Mo STL/STL
316L STL/STL Inconel Inconel/Inconel

Commonly used fastener material:

Bolts Nuts Max temp °C
35 25 425
35CrMo 35, 45 425
35CrMo 30CrMo 500
25Cr2MoVA 30CrMo 550
0Cr18Ni9 0Cr18Ni9 600
0Cr17Ni12Mo2 0Cr17Ni12Mo2 600
25Cr2Mo1VA 25Cr2Mo1VA 600
25Cr2MoVA 25Cr2MoVA 600

Matching materials of bolts and nuts for American standard valves:

Bolts nuts application temp
standard grade name standard grade name
ASTM A193 B7 ASTM A194 2H -29/425°C
B7M 2HM -29/425°C NACE standard, anti-sulfer valve
B16 7 -29/593°C
B8 8 -196/700°C
B8M 8M
ASTM A320 L7 4 -46/101°C Cryogenic valve

Chemical composition and mechanical properties of commonly used bolts and nuts for American standard valves:

Chemical composition and mechanical properties of commonly used bolts and nuts for American standard valves

Chemical composition and mechanical properties of commonly used bolts and nuts for American standard valves

Conditions of use of metal gaskets:

material HB max Pressure Mpa(lb) suitable temp °C
10/08 120 2.0-42(150-2500) 450
0Cr13 170 2.0-15(150-900) 540
0Cr18Ni9 160 600
0Cr17Ni12Mo2

Spiral wound gasket service conditions:

metal belt material Non-metallic belt material Pressure grade Mpa (lb) suitable temp °C
0Cr18Ni9 flexible graphite 2.0-26(150-1500) 650
0Cr17Ni12Mo2 flexible graphite
00Cr17Ni14Mo2 PTFE 200

Conditions for use of metal-clad gasket:

Cladding metal material HB filling material pressure Mpa(lb) suitable temp °C
Al L3 40 asbestos 2.0-15(150-900) 200
Co T3 60 300
Galvanized steel sheet 90 400
Galvanized steel sheet 08F
0Cr18Ni9 187 500
00Cr19Ni10
00Cr17Ni14Mo2

Use conditions of flexible graphite composite gasket:

Core board and edging material pressure grade Mpa (lb) suitable temp °C
low-carbon steel 2.0-11(150-600) 450
0Cr18Ni9 2.0-11(150-600) 650

Non-metallic gasket usage conditions:

material name code name pressure Mpa suitable temperature °C
natural rubber NR 2.0 -50/90
Neoprene CR 2.0 -40/100
NBR NBR 2.0 -30/110
Ethylbenzene rubber SBR 2.0 -30/110
EPDM rubber EPDM 2.0 -40/130
fluororubber Viton 2.0 -50/200
Asbestos Rubber Sheet XB350 XB450 NY400 2.0 ≤300 P.T≤650 Mpa °C
Oil-resistant asbestos rubber sheet
Modified or filled with PTFE 5.0 -196/260

Comparison table of common metal materials specified by Chinese, Japanese, German, British, American and international standards:

Comparison table of common metal materials specified by Chinese, Japanese, German, British, American and international standards

Comparison table of common metal materials specified by Chinese, Japanese, German, British, American and international standards

WC carbon steel +A/B/C –WCA,WCB,WCC

WC carbon steel +ABC --WCA,WCB,WCC

WC carbon steel +ABC –WCA,WCB,WCC

Please see the Full documentation at this link: https://www.tanghaivalve.com/wp-content/uploads/2020/09/valve-material-and-valve-standards-Detailed-version.pdf

TH Valve is a professional manufacturer of butterfly valvegate valvecheck valveglobe valveknife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

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