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Cobalt-Chromium Alloy 20 Ball

Product Details

Cobalt-chromium Alloy valve ball and seat are very important parts of underground oil-well pump , they always show up together and cooperate very good , no better material can replace Cobalt-chromium Alloy now .

The valve balls are made of Cobalt-chromium Alloy 20 and valve seat are made of Cobalt-chromium Alloy 3 . They are a good team to resist the wear and corrosion issue in oil and gas pimping process .

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Description

What is the Details of our stellite valve seat and ball?

 

Material Cobalt-chromium Alloy –Grade 3 and 20
Process Powder Metallurgy , it is short for PM
Hardness 53-59HRC
Density 8.6-8.8 g/cm ³
Size Diameter 11-60 mm
Properties Wear and corrosion resistance, high temperature resistance
Application Oil well pump components ,  wear and corrosion resistance parts
Instructions Drawing made upon cutomers request
Usage One balls with one valve
Tolerance control Turning or grinding surface , tolerance upon drawing
Production lead time Samples 10 days , normal order 30 days
Production capacity 40,000pcs one month.
Package Carton or wooden case , pallet for export

 

Chemical composition

 

Grade C Mn Si Cr Ni Mo W Co Fe P S Density

(g/cm³)

 Hardness

(HRC)
Cobalt-chromium Alloy 3 2.0-2.7 1.0 1.0 29-33 3.0 11-14 Bal. 3.0 ≤0.03 ≤0.03 8.55 51-55
Cobalt-chromium Alloy 20 2.2-3.0 2.0 30-34 3.0 1.0 14-18 Bal. 3.0 ≤0.05 ≤0.05 8.65 53-59

 

API Valve Seat and ball Standard

 

No. Specifications Seat Dimensions

OD/ID×H (in)

 Weight

(g/pc)

 Ball Dimensions Weight

(g/pc)
1 VII-106 0.793/0.460×0.500 22.81 15.88 18.44
2 VII-125 0.918/0.550×0.500 29.55 19.05 31.84
3 VII-150 1.168/0.670×0.500 49.53 23.83 62.32
4 VII-175 1.388/0.825×0.500 68.13 28.58 107.51
5 VII-200 1.478/0.960×0.500 69.05 31.75 147.40
6 VII-225 1.720/1.060×0.500 100.34 34.93 196.27
7 VII-250 2.010/1.310×0.500 127.04 42.88 363.10
8 VII-375-1 3.072/1.700×0.750 536.94 57.15 859.63
9 VII-375-2 3.072/1.880×0.750 484.12 57.15 859.63

 

Production Process—Powder metallurgy

Mixing powder – Pressing – sintering – machining

We guarantee the balls roundness and accuracy, also the tightness of ball and seat.

 

Our service:

1.Supply Cobalt-chromium Alloy parts upon customer drawing and request

2.Free samples could be provided for testing

3.Both big quantity and small quantity are acceptable , Order flexible.

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