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Tangshan Fengrun Shougang Metallurgy And Building Materials Co.,Ltd.
Add：Baiguantun Economic Development Zone, Fengrun District,Tangshan City
P.C.：064005
Middle Chrome Cast Balls（Cr:4%-9%）
Shougang steel ball set research and development, service as one of the wear-resistant materials production enterprises. Main products: wear-resistant steel ball, wear-resistant steel forging, mill liner, crusher hammer, etc.
Key words:
Middle Chrome Cast Balls（Cr:4%-9%）
Classification:
- Product Specification
- Procedure, Quality Inspection & Guarante
- Weight & Tolerance
- Application, Packaging
-
1.Chemical Composition
Steel Ball Size
Φ8mm~Φ150mm
Name
Grade
Chemical Compositions
C
Si
Mn
Cr
P
S
Mo
Ni
Cu
Medium Chrome Cast Iron
Grinding Media Balls(MCCB)
ZQCR4
2.1-3.3
≤2.20
0.3~1.50
4~5
≤0.10
≤0.10
Trace
Trace
Trace
ZQCR5
5~6
ZQCR6
6~7
ZQCR7
7~8
≤0.08
≤0.06
ZQCR8
8~9
ZQCR9
9~10
2、Hardness, Impact-toughness, Metallurgical Structure:
Name
Grade
Surface Hardness
(HRC)
Volumetric Hardness（HRC）
Impact toughness(Ak:J/cm2)
Metallurgical Structure
Dropping Balls Test/Fatigue Life Test (3.5Meter Height)
Medium Chrome Cast Iron Grinding Media Balls(MCCB)
ZQCR4-ZQCR6
47-52
46-51
≥2.5
B+C
80≤Φ≤150
8000
ZQCR7-ZQCR9
48-53
48-52
B-Bainite, C-Carbide
Key words:- cr
- balls
- hardness
- trace
- test
- 0.10
- structure
- mccb
- cast
- media
-
1.Procedure:
Material—Inspection & Classification—Weighing Preparation—Melting—Initial Melting Inspection—E.F Conditioning—Casting—Inspection after Melting— Separation & Polishing—Semi-Finished Products Inspection—Tempering—Hardness Test—Qualified Products Stock—Packing & Delivery
2.Heat Treatment:
Based on different chemical compositions, continuously hardening treatment can improve steel ball's hardness under certain temperatures, so as to meet different applications and working conditions.
3.Quality Inspection:
We can make precise control on steel ball's overall hardness during processing, it make overall hardness are even, there is no more than 3 HRC difference between core and surface hardness.。
Note: Above chart is hardness profile typical distribution of ZQCR6 70mm steel ball
4.Quality Assurance:
Quality Assurance: The breakage rate should be less than 1% in ball mill application.
-
Diameter Tolerance& Weight List
Steel Ball Dia.(mm)
8<Φ≤30
30<Φ≤60
60<Φ≤90
Φ100-Φ150
Diameter Tolerance(mm)
+1，-1
+1.5.-1
`+2.5，-1
`+3，-1
Diameter(mm)
Unit Weight (Kg/Pc)
Quantity（Pcs/Ton）
8mm
0.0021
476190
10mm
0.0041
243902
12mm
0.0071
140845
15mm
0.014
71429
17mm
0.02
50000
20mm
0.032
31250
25mm
0.064
15625
30mm
0.116
8620
35mm
0.176
5682
40mm
0.263
3802
50mm
0.513
1949
60mm
0.888
1126
70mm
1.49
671
80mm
2.104
475
90mm
2.996
334
100mm
4.11
243
110mm
5.46
183
120mm
7.1
141
125mm
8
125
130mm
9.03
111
140mm
11.1
90
150mm
13.6
73
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1. Application: MCCB series grinding ball usually apply to black metal mines, thermal power plant coal ball mill, building materials ball mill grinding and it is also suitable for ball mill in polymetallic ores grinding.Shougang Brand MCCB has scale to over 20 provinces and export to more than 10 countries and area, earns good comments by customers.
2. Cast Ball Packaging Method:
By flexible bag: Net Weight 1000Kg/Bag;
By steel drum: Net Weight 850Kg~950Kg/drum
Related Products
Consultation
Contact Us
Tangshan Fengrun Shougang Metallurgy And Building Materials Co.,Ltd.
Add：Baiguantun Economic Development Zone, Fengrun District,Tangshan City
P.C.：064005
Domestic business
Tel/Fax：+86-315-5507099
Contact：Wong shougang +86-13739831999 / Zhang dongxia +86-13785543600 / Wong yachao +86-13933300918
Email：sgnmcl@126.com
International Business
Tel/Fax:+86-315-5115988
Contacts:Mike +86-15531516577，
Email:mike@sgsteelball.com，(Overseas Market)
Contacts:Oksana Shevchenko
Mob.: +86-159-6239-0710 (Telegram, WhatsApp, Viber)
WeChat: oksana1212
Email: Oksana.sgsteelball@yandex.ru
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