CaSi 30/60 Calcium Silicon Alloy | Ca30Si60 Supplier
CaSi 30/60, also known as Ca30Si60 calcium silicon alloy, is a calcium-silicon ferroalloy designed for controlled metallurgical treatment. With calcium content of approximately 30% and silicon content around 60%, it is commonly considered for steelmaking applications involving deoxidation, desulfurization and inclusion modification.
For buyers, however, purchasing CaSi 30/60 is not simply a matter of finding a material labeled "30/60." The actual specification may include limits for aluminum, carbon, phosphorus and sulfur, together with particle size, moisture and packaging requirements. These details can influence how the alloy performs during addition to molten steel.
What Does CaSi 30/60 Mean?
The designation CaSi 30/60 normally refers to the approximate principal composition of the alloy: around 30% calcium and 60% silicon. The remaining portion mainly consists of iron and other elements present within the agreed specification.
A representative specification may be approximately:
| Parameter | Typical Requirement |
|---|---|
| Ca | ≥30% |
| Si | 55–60% or according to agreed specification |
| C | ≤1.0% |
| Al | ≤2.4% |
| P | ≤0.04% |
| S | ≤0.04–0.05% |
The final purchasing specification should always be confirmed before production because CaSi grades can be supplied according to different standards and customer requirements.
Why Choose CaSi 30/60?
One reason buyers choose CaSi 30/60 is the combination of calcium and silicon in one alloy. Instead of separately managing calcium and silicon additions, a combined alloy can be incorporated into a controlled metallurgical treatment route.
Calcium Function
Calcium has a strong chemical affinity with oxygen and sulfur. In secondary steelmaking, calcium treatment is particularly important for controlling the characteristics of non-metallic inclusions.
Silicon Function
Silicon contributes to deoxidation and can also be useful when silicon is already part of the target steel chemistry. Combining calcium and silicon provides a practical metallurgical addition for steel mills.
CaSi 30/60 in Secondary Steelmaking
The most important application for CaSi 30/60 is secondary metallurgy. After primary steelmaking, the molten steel may require additional treatment to adjust composition and control inclusions before continuous casting.
Depending on the plant's process, CaSi may be added directly in suitable particle form or processed into cored wire. Cored-wire feeding allows the operator to control the depth and timing of calcium-containing material entering the molten steel.
The exact addition rate should not be copied from another steel plant because calcium recovery is affected by temperature, slag condition, steel chemistry and treatment practice.
CaSi 30/60 for Inclusion Modification
Inclusion control is one of the most technically interesting applications of calcium silicon.
Some oxide inclusions can have unfavorable shapes or physical characteristics. Calcium treatment can alter the composition and morphology of certain inclusions, helping make them more suitable for subsequent casting and processing.
This is especially relevant for steel products where cleanliness and fatigue performance are important, including certain bearing, spring, automotive and high-quality structural steels.
Recommended Particle Sizes
CaSi 30/60 can be supplied in different forms depending on the customer's feeding equipment:
- 0–3 mm powder or fine material
- 1–3 mm fine particles
- 3–10 mm granular material
- 10–50 mm lump material
- Other customized sizes
When the material is intended for cored wire production, the particle size should be agreed with the wire manufacturer rather than automatically using a standard lump specification.
CaSi 30/60 vs CaSi 28/60
| Feature | CaSi 30/60 | CaSi 28/60 |
|---|---|---|
| Nominal Ca | About 30% | About 28% |
| Typical Si range | Around 55–60% | Around 55–65% |
| Main use | Steelmaking and calcium treatment | Steelmaking and calcium treatment |
| Particle size | Customized | Customized |
| Packaging | Bulk/export/custom | Bulk/export/custom |
The higher nominal calcium content of CaSi 30/60 may be useful when the customer's treatment recipe is designed around a specific calcium addition target. The final choice should be based on the steel mill's process calculations.
Quality Control Before Shipment
For CaSi 30/60, we recommend checking both chemistry and physical condition. Important inspection points include:
- Calcium content
- Silicon content
- Aluminum level
- Carbon level
- Phosphorus and sulfur
- Particle size
- Moisture and packaging
- Batch consistency
For industrial orders, buyers can request a COA and arrange third-party inspection when required by their procurement system.
Packaging for International Shipment
Depending on the particle size and order quantity, CaSi 30/60 can be packed in waterproof bags, jumbo bags or other export packaging agreed with the customer.
Packaging should be selected according to the transportation route and storage period. Calcium-containing ferroalloys should be protected from unnecessary moisture exposure before use.
Why Source CaSi 30/60 from China?
China has an established ferroalloy supply chain covering silicon alloys, calcium alloys, cored wire and related metallurgical materials. For overseas buyers, working directly with a Chinese supplier can simplify product customization and coordination of multiple ferroalloy products.
ZhenAn focuses on industrial ferroalloy supply and can coordinate chemical composition, size, packaging, documentation and shipment requirements for international customers.
Frequently Asked Questions
1. What does CaSi 30/60 mean?
CaSi 30/60 generally refers to a calcium silicon alloy containing approximately 30% calcium and around 60% silicon, subject to the agreed product specification.
2. Is CaSi 30/60 used as a deoxidizer?
Yes. It can be used as a composite deoxidizing material and as part of calcium treatment during secondary steelmaking.
3. Can CaSi 30/60 modify inclusions?
Yes. Calcium treatment is widely used to modify certain non-metallic inclusions and improve molten-steel cleanliness and castability.
4. What size CaSi 30/60 can you supply?
Common sizes include fine particles and 10–50 mm lumps, while customized sizing can be discussed according to the application.
5. Can CaSi 30/60 be used to make cored wire?
Yes. Suitable CaSi powder can be used as the core material for calcium silicon cored wire.
6. Do you provide COA?
Yes. A certificate of analysis can be provided according to the order and agreed specification.
7. How can I request a CaSi 30/60 quotation?
Send us the required Ca content, Si content, size, quantity, packaging and destination. We will confirm the available specification and quotation.
Order CaSi 30/60 from ZhenAn
For CaSi 30/60 calcium silicon alloy, please contact our sales team with your technical requirements. We can discuss standard or customized specifications for steelmaking and metallurgical applications.
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