Manganese Ferroalloys：CHUO DENKI KOGYO CO.,LTD.

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Types of manganese ferroalloys

				There are many types of manganese ferroalloys, varying in their carbon and silicon content. CDK produces high-carbon ferromanganese and silicomanganese.
High-carbon ferromanganese		Silicomanganese

Manganese ferroalloy applications

				Manganese ferroalloys are auxiliary materials added primarily to steels to give them strength and toughness. Their compounds commonly range from 0.2% up to around 2% by weight. The primary applications of manganese ferroalloys are as a manganese additive in steelmaking, deoxidizers and desulfurizers in steelmaking, and flux for welding rods.
Bridge		Pipeline

Manganese ferroalloy quality and specifications

Quality and specifications of the manganese ferroalloys available from CDK are given in the table below.

Alloy		JIS Code	Chemical Constituents (wt%)
Alloy		JIS Code	Mn	C	Si	P	S	Notes
High-carbon ferromanganese	No. 1	FMnH1	73-78	7.3max	1.2max	0.40max	0.02max
Silicomanganese	No. 1	SiMn1	65-70	2.0max	16-20	0.30max	0.02max
Silicomanganese	No. 3	SiMn3	60-65	2.5max	14-18	0.30max	0.03max
Medium-carbon ferromanganese	No. 0	FMnM0	80-85	1.5max	1.5max	0.40max	0.02max
	No. 2	FMnM2	75-80	2.0max	2.0max	0.40max	0.02max
			75-80	2.0max	2.0max	0.15max	0.02max	Low-P
			75-80	2.0max	0.5max	0.40max	0.02max	Low-Si
Low-carbon ferromanganese	No. 1	FMnL1	75-80	1.0max	1.5max	0.40max	0.02max
Low-carbon ferromanganese	No. 1	FMnL1	75-80	1.0max	1.5max	0.15max	0.02max	Low-P
Medium-carbon ferromanganese, oxidized powder			73.0-80.0	2.0max	2.0max	0.15max	0.02max
Medium-carbon ferromanganese, nitrided briquettes			70min	2.0max	2.0max	0.40max	S:0.02max N:5.0min

Ferroalloy electric furnace: exterior and frame view



Kashima electric furnace no. 1: 49,500 KVA, used in FMnH1 production	Kashima electric furnace no. 2: 50,000 KVA, used in SiMn3 production

合金鉄製造用電気炉

Electric furnace used in ferroalloy production