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Tohoku Steel Co., Ltd.
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Heat Treatment Process

Our high-quality heat treatment technologies has been developed through years of know-how gleaned via special steel manufacturing technology.

- We have two plants in Miyagi (Murata) and Ibaraki (Tsuchiura) to provide services of heat treatment and surface treatment with direct pickup and delivery available from Tohoku to Kanto regions.
- We also utilize the parcel delivery service to everywhere in Japan.
Small lots / quick delivery
We can provide quick delivery ranging from one item to bulk orders.
Safe, reliable quality assurance
Our quality assurance system is based on 30 years of experience and ISO9001 certification.

[Heat treatment]

Content of treatment Representative material Features Applied Product Example Usage
Vacuum hardening / tempering

SKD, SKH, SKS, SUS440C, etc. After hardening dies, parts, tools etc. in a vacuum furnace, we perform bright tempering. Mold for plastics
Cold forging die
Hot forging die
IT related parts
Machine parts
Annealing for magnetic propeties

KM, SUY, SPC, etc. Recovering of products with degraded magnetic properties due to processing strain is done in a vacuum atmosphere. automobile parts
Communication device parts
Drive control parts
Hydrogen annealing

PC, PB, etc. Recovering of products with degraded magnetic properties due to processing strain is done in a hydrogen atmosphere. Audio parts
Measuring parts

[Surface treatment]

Content of treatment Representative material Features Applied Product Example Usage
Kirin Coat S
(New Product)

NAK, SUS304, SKD, SKH, etc. Longer life can be provided for metal die via Kirin Coat S.
Moreover, as finish grinding is unnecessary after special nitriding, costs are reduced.
Mold for plastics
Metal die for molding
Kirin Coat C
(New Product)

NAK, SUS304, SKD, SKH, etc. By performing PVD treatment on Kirin Coat S, impact durability is improved, making it ideal for high deformation metal dies. Press die
Mold for plastics
Metal die for molding
PVD treatment

Cemented carbide, SUS, SKD, SKH, etc. Since the surface is clad with a firm adhesive coating, this treatment is ideal for extending the lifespan of metal die, cutting tool, etc. Cutting tool
Press die
Mold for plastics
Semiconductor equipment parts
Gas nitrocarburizing

NAK, SKD, SKS, SPC, SKH, etc. A low cost surface hardening process for products of all shapes. Electric parts
Machine parts
OA parts

Queries / orders

Contact information for queries regarding heat treatment, surface treatment
Phone: +81-224-83-5606 Fax: +81-224-82-1023
Click here to contact us via email

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