JUNDA company produces φ20 to φ 150 forged steel balls ,select high quality round steel,low-carbon alloy ,high manganese steel,high carbon and high manganese alloy steel as raw material produced by air hammer forging process.
JUNDA forged steel ball is tight inside, made of round steel forging, avoiding the defects caused by the process in the cast state, the internal density is large, the fine particle size is high, the ball's drop resistance and impact toughness are enhanced, thus reducing the crushing rate of the ball; The impact toughness is 4-5 times that of the cast ball, and this technical parameter determines that the crushing rate of the forged ball is much lower than that of the cast ball
| Technical parameters of forging steel ball |
| Inch |
Size |
T weight |
Tolerance(mm) |
Material |
Surface hardness(HRC) |
Volume hardness(HRC) |
| 3/4" |
D20mm |
0.037+/-0.005 |
2+/-1 |
B2 |
63-66 |
63-66 |
| 1" |
D25mm |
0.072+/-0.01 |
2+/-1 |
B2 |
63-66 |
63-66 |
| 11/4" |
D30mm |
0.13+/-0.02 |
2+/-1 |
B2 |
63-66 |
63-66 |
| 11/2" |
D40mm |
0.30+/-0.04 |
2+/-1 |
B2 |
62-66 |
62-66 |
| 2" |
D50mm |
0.6+/-0.05 |
2+/-1 |
B2 |
62-65 |
61-64 |
| 21/2" |
D60mm |
1.0+/-0.05 |
2+/-1.5 |
B2 |
62-65 |
60-62 |
| 21/2" |
D65mm |
1.3+/-0.05 |
2+/-1.5 |
B2 |
61-64 |
60-62 |
| 21/2" |
D65mm |
1.3+/-0.05 |
2+/-1.5 |
B3 |
61-63 |
60-62 |
| 3" |
D75mm |
2.0+/-0.06 |
3+/-2 |
B3 |
61-63 |
60-62 |
| 3"(Hot rolled) |
D80mm |
2.0+/-0.06 |
3+/-2 |
B3 |
60-63 |
60-62 |
| 3"(Forged) |
D80mm |
2.1+/-0.06 |
3+/-2 |
B3 |
60-62 |
53-57 |
| 31/2" |
D90mm |
3.0+/-0.07 |
3+/-2 |
B3 |
60-63 |
59-62 |
| 4" |
D100mm |
4.1+/-0.15 |
3+/-2 |
B3 |
60-63 |
59-62 |
| 4.5" |
D115mm |
6.3+/-0.15 |
3+/-2 |
B3 |
60-63 |
57-60 |
| 5" |
D125mm |
8.1+/-0.3 |
3+/-2 |
B3 |
59-62 |
55-60 |
| Chemical composition |
C% |
Si% |
Mn% |
Cr% |
P% |
S% |
Ni% |
| B2 |
0.72-1.03 |
0.15-0.35 |
0.3-1.2 |
0.2-0.6 |
≤0.035 |
≤0.035 |
i≤0.25 |
| B3 |
0.53-0.88 |
1.2-2.00 |
0.50-1.20 |
0.7-1.20 |
≤0.035 |
≤0.035 |
i≤0.25 |
Located in Jinan City, Shandong Province, Jinan Junda Industrial Technology Co., Ltd. provides excellent wear resistance and impact resistance for mining and industrial applications, focusing on the development of wear-resistant alumina ceramics. With over a decade of experience and 200 highly skilled workers, we produce over 2000 tonnes of alumina ceramics and related products every month.
If any need, please do not hesitate to contact us!
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