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Shougang Metallurgical Building Materials Co., Ltd., Fengrun District, Tangshan City
Address: Baiguantun Economic Development Zone, Fengrun District, Tangshan City, Hebei Province
Website: www.sgsteelball.cn
Website: www.sgsteelball.com
Ultra-high chromium cast balls SHCCB (Cr: 20%-28%)
1. Chemical Composition: Steel Ball Grades, Φ8 mm to Φ150 mm Name | Grade | Chemical Composition ---|---|--- SHCCB (Ultra-High Chromium Cast Steel Ball) | ZQCR20 | C: 2.0–3.3% | Si: ≤1.20% | Mn: 0.3–2.0% | Cr: 20–21% | P: ≤0.06% | S: ≤0.06% | Mo: ≤3.0% | Ni: ≤1.5% | Cu: ≤1.2% ZQCR21 | 21–22% ZQCR22 | 22–23% ZQCR23 | 23–24% ZQCR24 | 0.3–2.2% | 24–25% ZQCR25 | 25–26% ZQCR26 | 26–27% ZQCR27 | 0.3–2.5%
Keywords:
Ultra-high chromium cast balls SHCCB (Cr: 20%-28%)
Category:
Product Description
1. Chemical Composition
|
Steel ball model |
Φ8 mm ~ Φ150 mm |
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Name |
Grade |
Chemical composition |
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|
C |
Yes |
Mn |
Cr |
P |
S |
Mo |
Ni |
Cu |
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|
Ultra-high-chromium cast steel balls |
ZQCR20 |
2.0-3.3 |
≤1.20 |
0.3~2.0 |
20~21 |
≤0.06 |
≤0.06 |
0~3.0 |
0~1.5 |
0~1.2 |
|
ZQCR21 |
21~22 |
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|
ZQCR22 |
22~23 |
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|
ZQCR23 |
23~24 |
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|
ZQCR24 |
0.3~2.2 |
24~25 |
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ZQCR25 |
25~26 |
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ZQCR26 |
26~27 |
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ZQCR27 |
0.3-2.5 |
27~28 |
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|
ZQCR28 |
28~29 |
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ZQCR29 |
29~30 |
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2. Hardness, impact toughness, and microstructure
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Name |
Grade |
Surface hardness |
Volumetric Hardness (HRC) |
Impact value |
Microstructure |
Drop-ball impact fatigue life |
|
|
Ultra-high chromium grinding |
ZQCR20-ZQCR24 |
58-63 |
58-62 |
≥3.5 |
M+C |
80≤Φ≤150 |
12000 |
|
ZQCR25-ZQCR27 |
57-62 |
57-61 |
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|
ZQCR28-ZQCR30 |
56-61 |
56-60 |
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|
M—Martensite, C—Carbide |
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3. Typical hardness distribution:
During the manufacturing process, we precisely control the overall hardness of the steel balls, ensuring uniformity throughout and a maximum differential between inner and outer hardness of no more than 2.5 HRC.
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