Marie Jay's Metal Products Co., Limited is located in Zhuzhou, Hunan, China, which is a heavy industrial city and hometown of tungsten carbide. Marie Jay's Metal Products Co., Limited's main focus is in the metal-processing industry. We specializes in design, development, and production of metal products in the fields of tungsten carbide products, titanium & titanium alloy products, nitinol products, molybdenum products, and other casted or machined products, such as ductile iron casted & machined products, gray iron casted & machined products, aluminum casted & machined products, and copper casted or forged & machined products etc. We especially pay attention on tungsten carbide products, titanium & titanium alloy products, and nitinol products. We are a professional Chinese manufacturer and supplier. And also we work with some factories by joint stock method. Our prices are competitive, and we can supply good quality products and comprehensive services as well. We export our products and develop new products according to customers' requirements to USA, Mexico, South America, Germany and western countries etc. by working with an export company. Work with us, you will benefit financially and conveniently from our good quality and services, and competitive prices. Any question, just contact Grace at grace.long@mj-metalproducts.com

1.
Tungsten Carbide Series
Balls & Seats
Ungrounded/Precision Grounded/Customized Balls and Seats
Marie Jay’s Metal Products Co., Limited.
麥銳傑金屬製造有限公司
http://www.mj-metalproducts.com

2.
Tungsten Carbide Balls and Seats’ Grades and Properties:
Grades
Cobalt Content Density Hardness TRS
(%) g/cm3 HRA N/mm2
YG3 3 15.10 92.4 1700
YG3X 3 15.10 93.6 1450
YG8 8 14.80 89.5 2200
YG6 6 14.95 90.5 1900
YG6X 6 14.95 91.5 1800
YG6A 6 14.80 93.0 1850
YG10 10 14.50 88.0 2650
YG11 11~12 14.50 86.0 2100
YG13 13 14.10 86.5 2500
Nickel Content
(%)
YN6 6 14.80 90.5 2100
YN9 9 14.60 89.5 2200
YN12 12 14.30 86.5 2250
Applications:
Hardware Industry
Valves
Bearings
Die-casting
Punching Parts
Grinding
Measuring
Chemical
Petroleum
Military

3.
Tungsten Carbide Balls & Seats:
Dimensions and tolerances of tungsten carbide balls & seats for references
10600 12500 15000 17500 20000 22500 25000 37500
D
(See note 3)
Inch 0.625 0.725 0.938 1.125 1.250 1.375 1.688 2.250
mm 15.88 19.05 23.83 28.58 31.75 34.93 42.88 57.15
H -0.020/-0.010
(+0.51/0.25)
Inch 0.500 0.500 0.500 0.500 0.500 0.500 0.500 0.750
mm 12.70 12.70 12.70 12.70 12.70 12.70 12.70 19.05
FZ +0.000/-0.031
(+0.00/-0.78)
Inch 0.767 0.892 1.11 1.331 1.421 1.631 1.921 2.950
mm 19.48 22.66 28.22 33.81 36.09 41.43 48.79 74.93
OD +0.000/-0.005
(-0.00/-0.13)
Inch 0.793 0.918 1.168 1.388 1.478 1.720 2.010 3.072
mm 20.14 23.32 29.67 35.26 37.54 43.69 51.05 78.03
ID +/-0.050
(+/-1.27)
Inch 0.460 0.550 0.670 0.825 0.960 1.060 1.310 1.700/1.800
mm 11.68 13.97 17.02 20.96 24.38 26.92 33.27 43.18/47.75
Note: 1. Standards of Balls & Seats: ISO3290, AFMBA.10-89, and DIN 5401 etc.
2. Grades: G10, G16, G29, G25, G50, G100, G1000 etc.
3. Customized balls and seats are available.

4.
Tungsten Carbide Balls & Seats’ Grades for References:
Grades and Requirements
Grades Vdws △Sph Ra Vdwl Tdn
10 0.25 0.25 0.025 0.5
16 0.4 0.40 0.032 0.8
20 0.5 0.50 0.04 1
28 0.7 0.70 0.05 1.4
40 1.0 1.00 0.08 2
60 1.5 1.50 0.10 3
100 2.5 2.50 0.125 5 +/-12.5
200 5 5 0.2 10 +/-25
500 13 13 25 +/-50

5.
Marie Jay’s Metal Products Co., Limited.
麥銳傑金屬製造有限公司
Import & Export Dept.:
Zhuzhou M&J Import and Export Co., Ltd.
株洲麦锐杰进出口有限责任公司
Web: http://www.mj-metalproducts.com
Add: 918#, Jingu Building, 152, Huanghe South Road, Tianyuan District,
Zhuzhou, Hunan, China, 412007
Tel: +86-731-28112392
Fax: +86-731-28112381
Email: mariejmetals@gmail.com
sales@mj-metalproducts.com