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  • Common Coating Materials

Common Coating Materials

Valve Gate: The core parts of flat gate valves used in the petrochemical industry require high pressure, wear resistance, corrosion prevention against H2S and CO2, especially wellhead and Christmas tree valves have higher requirements. 

Product parameters

This part can be illustrated by a table shown below:


nameDescriptionChemical compositionMax thicknessHardnessBond strengthPorosityLimit temperatureCosting 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 /25NiCr

Ni: 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



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  • 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
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