Fe-Cr(HC)

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1. Introduce

– Chromium-iron alloy containing about 65 to 75% Cr and 6 to 9% C

* Fe-Cr

– Alloy of chromium and iron containing 50~70% chromium

– As a raw material for stainless steel, chromium is an important element that plays a role in improving corrosion resistance, and Fe-Cr is generally used to control the content of chromium in stainless steel manufacturing

* Classification of Fe-Cr according to carbon content

(1) Fe-Cr(HC) : C : 6~9%

(2) Fe-Cr(MC) : C : 1~4%

(3) Fe-Cr(LC) : C : 0.25~0.1%

* Carbon content of Fe-Cr : affects hardness and brittleness
→ Higher carbon content improves hardness
→ Lower carbon content reduces the risk of carbide precipitation

* Chromium content in Fe-Cr : affects oxidation resistance and heat resistance
→ Higher chromium content has better oxidation resistance and heat resistance

* Application of Fe-Cr

– High-quality Fe-Cr is applied instead of metallic Cr in alloy production, which is more economical

(1) Stainless steel production

– Adding Fe-Cr to stainless steel improves corrosion resistance, hardness and toughness

(2) Superalloys

– Adding Fe-Cr to superalloys to improve fatigue and creep resistance

(3) Refractories

– Adding Fe-Cr to refractories to improve corrosion and wear resistance and maintain temperature uniformity in high-temperature environments

* Difference between Fe-Cr and Cr

	Chemical Composistion	Properties	Application & Product
Fe-Cr	60~70%Cr, 6~8%C	Excellent heat resistance, tensile strength, and hardness	Manufacturing of steel alloys (stainless steel, tool steel, other specialty alloys)
Cr	90%Cr (Min)	Excellent corrosion resistance	Decorative (decorative trim, wheels, bumpers)

2. Property

– Good corrosion resistance, hardness, toughness, fatigue and creep resistance, abrasion resistance

[Fe-Cr(HC) Chemical Composition (%)]