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Material Standards for Valve Body Parts

 

Our Dandong Foundry can produce some valve parts by grey cast iron, ductile cast iron and cast steel materials.

The valve body, bonnet and disc are the main parts of the valve and are directly subjected to the medium pressure. The materials used must comply with the standard of "pressure and temperature rating of the valve".

The common materials and standard as below:

NO.

Materials

Pressure

Temperature

Medium

Grades

1

Gray cast iron

≤1.0MPa

-10 °C ~ 200 °C

water, steam, air, gas and oil

HT200,
HT250,
HT300,
HT350

2

Forgeable cast iron

≤ 2.5MPa

-30 ~ 300 °C

water, steam, air and oil

KTH300-06,
KTH330-08,
KTH350-10

3

Ductile iron

≤4.0MPa

-30~350°C

water, steam, air and oil

QT400—15,
QT450—10,
QT500—7

4

Acid-resistant high silicon ductile iron

≤ 0.25MPa

below 120 °C

5

Carbon steel

≤32.0MPa

-30~425°C

water, steam, air, hydrogen, ammonia, nitrogen and petroleum products

WC1, WCB, ZG25 and high quality steel 20, 25, 30 and low alloy structural steel 16Mn.

6

Copper alloy

≤ 2.5MPa

-40 ~ 250 °C

water, seawater, oxygen, air, oil and other media

ZGnSn10Zn2 (tin bronze), H62, Hpb59-1 (brass), QAZ19-2, QA19-4 (aluminum bronze).

7

High temperature copper

≤17.0MPA

≤570°C

steam and petroleum products

ZGCr5Mo, 1Cr5M0, ZG20CrMoV, ZG15Gr1Mo1V, 12CrMoV, WC6, WC9 and other grades.

8

Low temperature steel

≤ 6.4Mpa

≥ -196 ° C

ethylene, propylene, liquid natural gas, liquid nitrogen and other media

ZG1Cr18Ni9
0Cr18Ni9
1Cr18Ni9Ti
ZG0Cr18Ni9

9

Stainless acid resistant steel

≤ 6.4Mpa

≤ 200 ° C

Nitrite acid, acetic acid and other media

ZG0Cr18Ni9Ti
ZG0Cr18Ni10
ZG0Cr18Ni12Mo2Ti
ZG1Cr18Ni12Mo2Ti

 

 


This article is from our Dandong Foundry's Material Standards for Valve Body Parts

 

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