It’s mainly done for the purposes of homogenization of carbon steel and low alloy steel and to improve mechanical properties. Generally, it’s air cooled after glowing red hot. It can provide the appropriate hardness and is applicable from small materials and parts to bigger ones.

Metallographic structure and treatment condition

before treatment

Large and nonuniformity structure
before treatment (hot forging)

 after treatment

Structure of ferrite +
perlite is uniformed after
treatment (standard structure)

Video presentation of treatment



Continuous furnace
Continuous furnace
Car bottom furnace
Car bottom furnace

The factroy is able to do

Kaita Factory
Kaita Factory

9-9 Tsukimi-machi, Kaita-cho, Aki-gun,
Hiroshima-ken, 736-0034, Japan
Tel. +81-(0)82-822-2957
Fax. +81-(0)82-822-7294
Numata Factory
Numata Factory

2-23-1 ohzuka-nishi, , Asaminami-ku,
Hiroshima-shi, 731-3167, Japan
Tel. +81-(0)82-848-6021
Fax. +81-(0)82-848-6301
Shiwa Factory
Shiwa Factory

190-1 Aza Fukasako, Kanmuri, Shiwa-cho,
Higashi-Hiroshima-shi, 739-0265, Japan
Tel. +81-(0)82-420-5511
Fax. +81-(0)82-420-5615

Contact Us

Nagato Heat Treatment (Thailand) Co., Ltd.
7 /379 Moo 6, Tambol Mabyangporn, Amphur Pluakdaeng, Rayong, Thailand
Tel. +66-(0)38-027-473  Fax. +66-(0)38-027-475