Low-carbon Chromium Iron

Chromium Iron Grades and Applications
Chromium iron is an iron alloy composed of chromium and iron, serving as a crucial alloying agent in steelmaking. It is categorized by different carbon contents, including high-carbon chromium iron (4-8% carbon), medium-carbon chromium iron (0.5-4% carbon), low-carbon chromium iron (0.15-0.50% carbon), micro-carbon chromium iron (0.06% carbon), ultra-micro carbon chromium iron (less than 0.03% carbon), metallic chromium, silicon-chromium alloys, and more. Common types also include silicon-chromium alloys and chromium iron nitrides. Chromium iron is primarily used as an alloying agent in steelmaking, traditionally added during the later stages of steel refining. With advancements in steelmaking processes, such as the use of AOD (see off-line refining) for producing stainless steel and other steel grades, carbon chromium iron (mainly charging-grade chromium iron) is loaded into the furnace. This allows for the adjustment of composition with low and micro-carbon chromium iron only in the later stages, thus making the production of carbon chromium iron a key focus in chromium iron manufacturing.
Microcarbon chromium iron is mainly used in the production of stainless steel, acid-resistant steel, and heat-resistant steel. Refining methods include electric silicon heat treatment and hot charge methods, among others.
Medium low carbon ferrochrome is used in the production of medium low carbon structural steel, chromium steel, and alloy structural steel.
High-carbon ferrochrome (including recycled ferrochrome) is primarily used for:
(1) Alloying agent for high-carbon ball bearing steel, tool steel, and high-speed steel, enhancing steel's hardenability, wear resistance, and hardness.
(2) Used as an additive for cast iron, improving its wear resistance and hardness, while also enhancing its heat resistance.
(3) Chromium raw materials used for the production of silicon-chromium alloys and medium, low, and ultra-low carbon ferrochrome by the渣-free method.
(4) Chromium-containing raw materials for the electrolytic production of metallic chromium.
(5) Raw material for stainless steel smelting by oxygen blowing method.