March 19, 2024
Deployed in a cement clinker grinding mill, these high-chromium cast grinding balls feature stable hardness and low breakage. They help us maintain consistent grinding output and lower long-term consumable costs.
Alloy steel casting stands as a cornerstone in the realm of industrial manufacturing, offering unparalleled strength, durability, and versatility. At Ninghu, we take pride in our mastery of it, delivering top-notch solutions tailored to meet the diverse needs of our esteemed clientele.
The item speaks to the apex of designing resourcefulness, combining the strength of steel with the flexibility of different alloying components such as chromium, nickel, and molybdenum. This combination comes about in a fabric eminent for its remarkable quality, erosion resistance, and warm resistance. With a keen eye for detail and unwavering dedication to quality, we craft alloy steel casting that exceeds industry standards, catering to a spectrum of applications across diverse sectors.

| Chemical Composition | |||||||||||||||
| Series No. |
Type | Designation | Chemical Composition | Mechanical Properties | Microstructure | ||||||||||
| C | Si | Mn | Cr | Mo | Ni | Cu | S | P | ak(J/cm²) | HRC | σb(Mpa) | ||||
| 1 | Medium carbon and medium chromium I | ZG30Cr5MoRE | 0.25~0.40 | 0.3~1.0 | 0.3~1.0 | 4.5~5.5 | 0.2~1.0 | ≤0.045 | ≤0.045 | ≥25 | ≥45 | M+B+C | |||
| 2 | Medium carbon and medium chromium II | ZG40Cr5MoRE | 0.30~0.45 | 0.3~1.0 | 0.3~1.0 | 4.5~5.5 | 0.2~1.0 | ≤0.045 | ≤0.045 | ≥20 | ≥48 | M+B+C | |||
| 3 | Medium carbon and low alloy | ZG40CrMoNiRE | 0.30~0.50 | 0.3~1.5 | 0.3~1.0 | 1.2~1.8 | 0.2~0.6 | 0.1~0.4 | ≤0.04 | ≤0.04 | ≥30 | ≥40 | M+F | ||
| 4 | Low carbon high alloy | ZG20Cr9NiMo | 0.15~3.50 | ≤1.0 | 0.3~1.0 | 8~10 | 0.4~0.8 | 1.4~1.8 | ≤0.1 | ≤0.045 | ≤0.045 | ≥40 | ≥40 | M+C | |
| 5 | Alloy steel with chromium+molybdenum+nickel | ZG45Cr3NiMoMnRE | 0.30~0.50 | 0.3~0.8 | 0.3~1.2 | 2.0~3.2 | 0.3~0.5 | 0.5~1.0 | ≤0.04 | ≤0.04 | ≥20 | ≥50 | M+C | ||
| 6 | Alloy steel with 90 chromium | ZG90Cr6MoMn | 0.85~0.95 | 0.4~0.8 | 0.4~0.8 | 5~8 | 0.2~0.4 | ≤0.045 | ≤0.045 | ≥7 | ≥50 | M+C | |||
| 7 | Ordinary high manganese steel | ZGMn13 | 1.1~1.4 | 0.3~1.0 | 11~14 | ≤0.06 | ≤0.10 | ≥147 | Hb≤229 | 637 | A | ||||
| 8 | Modified high manganese steel | ZGMn13cr2 | 1.0~1.5 | 0.3~1.0 | 11~14 | 0.5~4.0 | ≤0.06 | ≤0.10 | ≥80 | ≤240 | A+C | ||||
| 9 | Ultra-high manganese steel | ZGMn17cr2 | 1.0~1.5 | 0.3~1.0 | 16~19 | 1.0~4.0 | Ti0.2~0.4 | ≤0.06 | ≤0.10 | ≥50 | ≤260 | A+C | |||
| 10 | High chromium cast iron | KmTBCr15Mo2 | 2.0~2.8 | ≤1.2 | 0.5~1.0 | 13~18 | 0.2~2.5 | 0~1.0 | 0~1.2 | ≤0.06 | ≤0.10 | ≥53 | M+A+C | ||
| 11 | High chromium cast iron | KmTBCr20Mo2 | 2.0~3.0 | ≤1.2 | 0.5~1.0 | 18~22 | 1.5~2.5 | 0~1.5 | 0.8~1.2 | ≤0.06 | ≤0.10 | ≥3 | ≥58 | M+A+C | |
| 12 | High chromium cast iron | KmTBCr26 | 2.0~3.0 | ≤1.2 | 0.5~1.0 | 23~28 | 0~1.0 | 0~1.5 | 0~2.0 | ≤0.06 | ≤0.10 | ≥55 | M+A+C | ||
| 13 | High chromium cast steel | ZGCr12SiMn-GT | 1.0~2.0 | ≤1.2 | 0.5~2.0 | 12~14 | 0~1.0 | 0~1.0 | 0~1.0 | ≤0.06 | ≤0.10 | ≥3.2 | ≥55 | M+A+C | |
| 14 | High chromium cast steel | ZGCr15SiMn-GT | 1.0~2.0 | ≤1.2 | 0.5~2.0 | 15~17 | 0~1.0 | 0~1.0 | 0~1.0 | ≤0.06 | ≤0.10 | ≥3.5 | ≥55 | M+A+C | |
| M-Martensite B-Bainite A-Austenite C-Carbide F-Ferrite | |||||||||||||||
Ninghu epitomizes excellence in alloy steel casting, backed by a state-of-the-art manufacturing facility equipped with the latest advancements in production technology. Our completely robotized generation line guarantees unmatched exactness and consistency, whereas our rigid quality control measures ensure adherence to the most noteworthy quality guidelines. We are glad beneficiaries of ISO9001 quality framework certification, underscoring our faithful commitment to quality confirmation. In addition, our status as assigned providers to major household moment and trade companies underscores our notoriety as a trusted supplier of premium items.
Ninghu is your trusted partner for high-quality alloy steel casting, delivering excellence and innovation to industries around the world. With our extensive expertise, cutting-edge technology, and unwavering commitment to quality, we stand poised to surpass your expectations and exceed your requirements. Contact us at sunnyqin@nhgrindingmedia.com to embark on a journey towards superior wear-resistant solutions and unparalleled success.
March 19, 2024
Deployed in a cement clinker grinding mill, these high-chromium cast grinding balls feature stable hardness and low breakage. They help us maintain consistent grinding output and lower long-term consumable costs.
June 24, 2025
Used in a copper-ore wet-grinding ball mill, the grinding balls show durable wear resistance under non-stop 24-hour operation. Stable grinding performance reduces frequent mill inspections for abnormal ball damage.
August 12, 2025
Used in an iron-ore grinding mill, these high-chromium cast grinding balls maintain uniform hardness from batch to batch. They withstand sustained heavy-load impacts well with minimal breakage, and reliable wear performance keeps our throughput steady over long operating cycles.
October 07, 2025
Adopted for a gold-ore grinding mill, these high-chromium cast balls have evenly distributed hardness. They hold up well under complex abrasive conditions, and their consistent wear profile helps us achieve fine, uniform particle size throughout service.
January 15, 2026
Applied in a limestone grinding production line, the cast steel balls perform reliably under fluctuating load conditions. Well-balanced wear characteristics effectively cut down unplanned downtime.