Silicon Chrome Alloy (also called Ferrosilicochromium) is a composite ferroalloy mainly composed of silicon, chromium and iron, manufactured by submerged arc furnace in accordance with GB/T 4009-2008 national standard. Our mainstream 10-50mm lump specification is the most widely used size for ladle and furnace feeding.

It integrates the strong deoxidation performance of silicon and the alloy strengthening effect of chromium. It can complete deoxidation and chromium alloying in one feeding operation, effectively reduce chromium oxidation loss, simplify smelting procedures and cut comprehensive production costs. It is a core raw material for stainless steel, heat-resistant steel, high-performance ductile iron and low-carbon ferrochrome production.

Silicon Chrome alloy

chemical composition

Grade	Si ≥ (%)	Cr ≥ (%)	C ≤ (%)	P ≤ (%)	S ≤ (%)	Main Application
FeCr30Si40-A	40.0	30.0	0.02	0.04	0.02	Ultra-low carbon stainless steel, high-purity special steel
FeCr30Si40-B	40.0	30.0	0.04	0.04	0.02	Ordinary stainless steel, precision castings
FeCr32Si35	35.0	32.0	1.0	0.04	0.02	General steelmaking & cast iron, cost-effective bulk production

Conventional Shapes: Lump, particles; Standard size: 10-50mm

Alternative Sizes: 10~30mm, 10~60mm, 10~100mm

Packaging: Standard 1-ton moisture-proof woven bag, pallet loading; customized sealed bags or drums for export are supported.

Storage: Store in dry and ventilated warehouse. Keep away from rain and moisture to prevent pulverization and composition instability.

Products Description

Synergistic Deoxidation & Alloying: Silicon preferentially reacts with oxygen in molten steel to form stable oxides, protecting chromium from oxidation. The chromium recovery rate reaches 92%–96%, 7%–11% higher than separate addition of ferrosilicon and ferrochrome.
Stable Melting Performance: 10-50mm uniform lumps feature low dust, fast melting and uniform reaction, suitable for manual and automatic feeding systems.
Strict Impurity Control: Ultra-low P and S avoid hot brittleness and cold brittleness of finished steel, fully meeting the requirements of clean steel production.
Cost & Efficiency Optimization: Reduce feeding times and shorten smelting cycle, effectively lower furnace energy consumption and labor cost.
Wide Compatibility: Stable chemical properties, no adverse reaction with molten steel and molten iron, applicable to multiple steelmaking and casting processes.

Products Application

1) Stainless Steel & Special Steel Smelting

It is the preferred composite additive for 304, 316 stainless steel, heat-resistant steel and tool steel. Silicon completes deep deoxidation to improve molten steel purity; chromium forms a dense passivation film on the steel surface, greatly enhancing corrosion resistance and high-temperature strength. Compared with separate raw materials, it realizes more precise composition control for finished steel.

2) High-Quality Ductile Iron & Castings

As an efficient inoculant and alloy additive for ductile iron and gray cast iron. It refines graphite structure, eliminates white cast defects, and improves machinability. Trace chromium stabilizes the matrix structure, enhancing wear resistance and thermal fatigue resistance. Widely used in engine crankshafts, gears, hydraulic parts and high-temperature castings.

3) Intermediate Alloy for Low-Carbon Ferrochrome Production

Used as key raw material in electro-silicon thermal process for producing medium, low and micro-carbon ferrochrome. Its high silicon and low carbon characteristics help reduce carbon content efficiently, which is essential for manufacturing ultra-low carbon stainless steel and high-end alloy steel.

4) Other Metallurgical Applications

Applied in wear-resistant steel, spring steel and high-temperature alloy production; also used as reducing agent in non-ferrous metal smelting to optimize finished material performance.

silicon-chromium alloy

FAQ

Q1: What are the advantages of silicon chrome alloy over separate ferrosilicon and ferrochrome?

A: It realizes one-step deoxidation and alloying to shorten smelting time. Meanwhile, silicon protects chromium from oxidation, raising chromium recovery rate and reducing overall production cost.

Q2: How to select the suitable grade of silicon chrome alloy?

A: Choose FeCr30Si40-A for ultra-low carbon steel; FeCr30Si40-B for ordinary stainless steel; FeCr32Si35 for general cast iron and bulk steelmaking.

Q3: What is the recommended addition amount?

A: The dosage depends on target steel grade, required chromium content and raw material components. Please calculate by material balance or consult our technical team for guidance.

Q4: What are the storage precautions?

A: Keep in dry and ventilated environment, avoid moisture to prevent pulverization and performance degradation.

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