Tool Steel
Tool Steel
Tool Steel

Tool steel is one of Daido's major products and we have a wide variety of products for cold, hot, high speed and plastic mold applications.
Some of our brand steels are highly evaluated globally such as DC53 and NAK. To satidfy our customers' demands, we are pursuing high quality products and high performance technical services.

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Hot Work Tool Steel (Die-Casting Die)

Hot Work Tool Steel (Die-Casting Die)

Daido Steel's tool steels lineup for die casting includes H13, matrix-high-speed steel, and original steel grades with excellent thermal conductivity and hardenability for large products.
Our products contribute to the prevention of heat checking, soldering, erosion and other issues that may happen in Al, Zn and Mg die-casting. Surface treatment such as nitriding or PVD coating is also possible.

Conceptual diagram

Conceptual diagram DH31-EX DHA-WORLD DHA1-A DHA1 DHA-Thermo DH2F DRM1

Products list

Grade Brand name Equivalent standard Characteristics Detailed information
JIS AISI WNr. Special page Brochure Technical data
Type H13 &
Modified
(5Cr)
Single
melted
DHA1 SKD61 H13
eq.
1.2344
eq.
・General-purpose hot work die
steel
DHA-WORLD SKD61
mod.
H13
mod.
1.2344
mod.
・High hardenability & toughness
DH2F SKD61
mod.
H13
mod.
1.2344
mod.
・40HRC Pre-hardened steel
・Easy machining
Type H13 &
2367
modified
(5Cr)
Remelted
DHA1-A SKD61 H13
eq.
1.2344
eq.
・Remelted steel of DHA1
DH31-EX - - 1.2367
mod.
・High hardenability & toughness
・High strength at elevated temp.
High
Thermal
Conductivity
Steel
DHA-Thermo - - - ・High thermal conductivity
High Speed
Tool Steel
Matrix Type
DRM1 - - - ・High toughness
・Maximum hardness 58HRC

For the latest physical property data, please see "Physical Properties“.
Values listed in the brochure may differ.

High Speed
Tool Steel

For technical information on Hot Work Tool Steel (Die-Casting Die) in general and peripheral technologies, please see "Related Documents".

Click here for TIG welding rod "DHW" for repairing Die-Casting Dies.

Technical Data

No. Title Publication / Source Volume & page Read the document
S01e Document with comments "DHA-WORLD"
(No. SD2002)
- - Open PDF file
S02e Document with comments "DH31-EX"
(No. SD2001)
- - Open PDF file
A01 熱間工具鋼の被削性におよぼすSi量の影響 大同特殊鋼技報「電気製鋼」 2000年 71巻 2号 p.119-129 Go to J-STAGE site
(A01e) Effect of Si Content on the Machinability
of Hot Working Die Steels (No. SD2005)
Source: DENKI-SEIKO
(Electric Furnace Steel)
2000, Vol. 71, No. 2, p. 119-129 Open PDF file
A02 熱間工具鋼の被削性におよぼすSiおよび硬さの影響 大同特殊鋼技報「電気製鋼」 2003年 74巻 2号 p.83-92 Go to J-STAGE site
A03 高信頼性汎用熱間ダイス鋼 “DHA-WORLD” 大同特殊鋼技報「電気製鋼」 2010年 81巻 1号 p.47-52 Go to DENKI-SEIKO page
C01 ダイカスト金型のヒートチェックに及ぼす硬さと合金元素 “モリブデン、シリコン” の影響 大同特殊鋼技報「電気製鋼」 2010年 81巻 1号 p.25-31 Go to DENKI-SEIKO page
C02 ダイカスト金型用の高熱伝導率工具鋼
“DHA-Thermo”
大同特殊鋼技報「電気製鋼」 2010年 81巻 1号 p.41-46 Go to DENKI-SEIKO page
C03e High Thermal Conductivity Steel and its
Application to Die Casting Tools
(No. SD2103)
Source: NADCA Die Casting
Congress & Exposition
2012, Transaction No. T12-071 Open PDF file
C04e Development and Applications of High
Hardenability Special Quality Die Casting
Mold Steels (No. SD2104)
Source: NADCA Die Casting
Congress & Tabletop
2013, Transaction No. T13-052 Open PDF file
C05 ダイカスト金型用鋼の衝撃値と耐ヒートチェック性 大同特殊鋼技報「電気製鋼」 2017年 88巻 2号 p.101-106 Go to DENKI-SEIKO page
C06 分流子の熱伝導率がその温度とビスケット部の凝固組織におよぼす影響 大同特殊鋼技報「電気製鋼」 2020年 91巻 2号 p.91-96 Go to DENKI-SEIKO page
C07e Gross crack mechanism analysis for
die-casting die (No. SD2102)
Source: KATA-GIJYUTSU
(Die and Mould Technology)
2020, Vol.35, No.12, p.42-43 Open PDF file
L01 高硬度・高靭性マトリックスハイスDRM鋼の開発 大同特殊鋼技報「電気製鋼」 2005年 76巻 4号 p.279-286 Go to J-STAGE site
(L01e) The Development of High Hardness and
Toughness Matrix Type High Speed Tool
Steels “DRM” (No. SD2108)
Source: DENKI-SEIKO
(Electric Furnace Steel)
2005, Vol. 76, No. 4, p. 279-286 Open PDF file
L02 金型用マトリックスハイスDRM鋼の実用事例 大同特殊鋼技報「電気製鋼」 2007年 78巻 4号 p.353-360 Go to J-STAGE site

Related Documents

No. Title Publication / Source Volume & page Read the document
D01 熱間工具鋼の軟窒化後窒素濃度分布に及ぼす合金元素の影響 大同特殊鋼技報「電気製鋼」 2007年 78巻 4号 p.307-314 Go to J-STAGE site
D02 熱間ダイス鋼における軟窒化拡散層のTEM組織観察 大同特殊鋼技報「電気製鋼」 2007年 78巻 4号 p.315-322 Go to J-STAGE site
D03 湯流れ解析によるダイカスト金型のヒートチェック予測 大同特殊鋼技報「電気製鋼」 2014年 85巻 1号 p.53-61 Go to DENKI-SEIKO page
D04e New Surfacing Material “DHW”
(No. SD2105)
Source: NADCA Die Casting
Congress & Tabletop
2016, Transaction No. T16-042 Open PDF file
D05 数値解析によるダイカストの離型抵抗予測 大同特殊鋼技報「電気製鋼」 2017年 88巻 1号 p.33-38 Go to DENKI-SEIKO page
D06e Evaluation of Heat Checking of Molds
through Flow and Solidification
Simulation (No. SD2106)
Source: NADCA Die Casting
Congress & Exposition
2018, Transaction No. T18-012 Open PDF file

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