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The valve can be divided into ball valve, butterfly valve, gate valve, globe valve and check valve, etc. The body material selection is very important for the use of the valve. The valve body material should be selected according to the nature of the medium and the condition of temperature and flow to determine (the particle, two-phase flow, etc.). The user is required to put forward the valve main material, Especially under the special conditions or harsh conditions. In most cases, the body material is the same or slightly higher than the pipeline material.
The body materials contain cast iron, ductile iron, carbon steel, and stainless steel,etc. Cast iron and ductile iron valves are usually used for low pressure valve. Carbon steel has a good temperature resistance up to 425 degrees, and it is a universal economic material.
The table show as below includes the temperature limit of the common body material, and users could choose the material you need as reference.
|
Name |
State |
Chinese Grade |
American Grade |
Temp. Scope |
||
|
Standard No. |
Grade No. |
Standard No. |
Grade No. |
|||
|
Cast iron |
Casting Piece |
GB/T 12226 |
HT200 |
ASTM A126 |
Gr.B |
0～200℃ |
|
GB/T 12226 |
HT250 |
ASTM A126 |
Gr.C |
|||
|
Ductile iron |
Casting Piece |
GB/T 12227 |
QT400-18 |
ASTM A536 |
60-40-18 |
0～350℃ |
|
GB/T 12227 |
QT450-10 |
ASTM A536 |
65-45-12 |
|||
|
Carbon Steel |
Casting Piece |
GB/T 12229 |
WCB |
ASTM A216 |
WCB |
-29～425℃ |
|
Forging Piece |
GB/T 12228 |
25 |
ASTM A105 |
|
||
|
GB/T 700 |
Q235A |
ASTM A283 |
Gr.C |
0～350℃ |
||
|
Stainless Steel |
Casting Piece |
GB/T 12230 |
CF8 |
ASTM A351 |
CF8 |
-254～816℃ |
|
GB/T 12230 |
CF8M |
ASTM A351 |
CF8M |
|||
|
GB/T 12230 |
CF3 |
ASTM A351 |
CF3 |
-254～425℃ |
||
|
GB/T 12230 |
CF3M |
ASTM A351 |
CF3M |
-254～450℃ |
||
|
— |
— |
ASTM A995 |
4A |
-46～315℃ |
||
|
— |
— |
ASTM A995 |
6A |
-101～315℃ |
||
|
Forging Piece |
GB/T 1220 |
0Cr18Ni9 |
ASTM A182 |
F304 |
-254～816℃ |
|
|
GB/T 1220 |
0Cr17Ni12Mo2 |
ASTM A182 |
F316 |
|||
|
GB/T 1220 |
00Cr19Ni10 |
ASTM A182 |
F304L |
-254～425℃ |
||
|
GB/T 1220 |
00Cr17Ni14Mo2 |
ASTM A182 |
F316L |
-254～450℃ |
||
|
GB/T 1220 |
022Cr22Ni5Mo3N |
ASTM A182 |
S31803 |
-46～315℃ |
||
|
GB/T 1220 |
022Cr25Ni7Mo4N |
ASTM A276 |
S32760 |
-101～315℃ |
||
|
Alloy Steel |
Casting Piece |
JB/T 5263 |
WC6 |
ASTM A217 |
WC6 |
-29～593℃ |
|
JB/T 5263 |
WC9 |
ASTM A217 |
WC9 |
-29～593℃ |
||
|
JB/T 5263 |
C12A |
ASTM A217 |
C12A |
-29～650℃ |
||
|
Forging Piece |
NB/T 47008 |
15CrMo |
ASTM A182 |
F11 |
-29～593℃ |
|
|
NB/T 47008 |
12Cr2Mo1 |
ASTM A182 |
F22 |
-29～593℃ |
||
|
NB/T 47008 |
10Cr9Mo1VNb |
ASTM A182 |
F91 |
-29～650℃ |
||
|
Low Temp. Steel |
Casting Piece |
JB/T 7248 |
LCB |
ASTM A352 |
LCB |
≥-46℃ |
|
JB/T 7248 |
LC1 |
ASTM A352 |
LC1 |
≥-59℃ |
||
|
JB/T 7248 |
LC2 |
ASTM A352 |
LC2 |
≥-73℃ |
||
|
JB/T 7248 |
LC3 |
ASTM A352 |
LC3 |
≥-101℃ |
||
|
Forging Piece |
— |
— |
ASTM A350 |
LF2 |
≥-46℃ |
|
|
— |
— |
ASTM A350 |
LF5 |
≥-59℃ |
||
|
— |
— |
ASTM A350 |
LF9 |
≥-73℃ |
||
|
— |
— |
ASTM A350 |
LF3 |
≥-101℃ |
||
