E-mail: ktf@szktf.com.cn

Seat

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  • Common Coating materials

Common Coating materials

Valve Seat: The detachable surface parts in valve are used to support the valve spool in the fully closed position and constitute a sealed part. Generally, valve seat diameter is the maximum flow diameter of the valve.

Product parameters

This part can be illustrated by a table shown below:


nameDescriptionChemical compositionMax thicknessHardnessBond strengthPorosityLimit temperature

Costing

characterlzation

wt.%mmHV0.3MPa%
WC-CoCrWC86/Co10/Cr4

Co:9-11


Cr:3.5-4.5


C:3.5-4.5


W: Bal

11100-1500>75<1%482

 Good abrasive resistance at low temperature

Compared with WC-Co, its oxidation resistance 

and corrosion resistance are improved.

The coating is compact and hard

WC-CoWC88/Co12

Co:11-13


C:3.6-5.5


W:Bal

21050-1200>75<1%454

Good abrasive resistance at low temperature.

 Limited oxidation resistance and corrosion 

resistance.

 The coating is compact and hard.

WC-CoWC83/Co17

Co:16-18


C:4.8-5.5


W: Bal

2950-1100>75<1%454

Good abrasive resistance at low temperature.

 Compared with WC-12Co, its abrasive resistance 

is poor, but toughness, impact strength and ductility are better.

 The coating is compact and hard.

Cr3C2 -NiCr75Cr3C2 /25NiCrNi:16-21
C:9-11

Cr:11

B:2.2 

Si:4 

Fe:2.7

C:0.4

Ni:Bal

1750-900>75<1.5%871

 Good abrasive and sliding abrasive performance 

of abrasive-resistant materials at high temperatures.

 Good corrosion resistance.

Cr3C2 -NiCr80Cr3C2 /20NiCr

Ni:14-18


C:9-11


Cr:Bal

1800-950>75<1.5%871

 Good abrasive and sliding abrasive performance 

of abrasive-resistant materials at high temperatures.

 Good corrosion resistance.

CoCrW   AlloyStellite 6

Cr:29

W:4

Ni:3

Fe:3

C:1.15

Si:1.1

Co:Bal

0.6HRC38±5>55<2%649

 Thermosetting and abrasive resistance are good.

Oxidation resistance and corrosion resistance 

are good.

CoCrW AlloyStellite 12

Cr:29.5

W:8.25

Ni:3

Fe:3

C:1.4

Si:1.45

Co:Bal

0.6HRC42±5>55<2%649

 Thermosetting and abrasive resistance are good. 

Compared with 6#, its abrasive resistance is better.

 Oxidation resistance and corrosion resistance are 

good.

CoCrW AlloyStellite 20

Cr:32.5

W:17.5

Ni:3

Fe:3

C:2.45

Si:1.0

Co:Bal

0.6HRC52±5>55<2%649

 Thermosetting and abrasive resistance are good. 

Compared with 12#, its abrasive resistance is 

better.

 Oxidation resistance and corrosion resistance are good.

Nickel   AlloyNi50

Cr:11

B:2.2

Si:4

Fe:2.7

C:0.4

Ni:Bal

0.5HRC50±5>41(HVOF)<2%550

 Stand wear and tear

 Erosion and abrasion

 Machinable
Nickel   AlloyNi55

Cr:15.5

B:3.0

Si:4

Fe:14

Mo:3

C:0.75

Ni:Bal

0.5HRC55±5>41(HVOF)<2%550

 Stand wear and tear

 Erosion and abrasion

 Machinable
Nickel   AlloyNi60

Cr:15

B:3.1
Si:4.3

Fe:4
C:0.65

Ni:Bal

0.5HRC60±5>41(HVOF)<2%550

 Stand wear and tear

 Erosion and abrasion

 Machinable



CONTACT US
  • Suzhou Kaitianfu Machinery Co., Ltd.
  • Add: Linhu Cailian Industrial Park, Wuzhong District Suzhou City, Jiangsu Prov., China
  • Tel: +86 512 6653 2885
  • Mob: +86 189 9444 4988
  • E-mail: ktf@szktf.com.cn
  • aaron.szktf@gmail.com