Information regarding the properties and applications of die casting alloys, including our proprietary developed alloys.

SUMIKALLOY T-31D (Die Casting Aluminum Alloys with High Toughness)

[Advantages]

High-strength alloys for die casting that take advantage of the excellent castability of SUMIKALLOY T-31.
Superior toughness than ADC12 alloys.

[Alloy composition]

Al-Si-Cu-Mg-Fe-system alloys

[Mechanical properties]

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Heat Treatment condition Tensile strength
(MPa)		 0.2% proof stress
(MPa)		 Elongation
(%)		 Hardness
(HB)
F 270 140 5 85
T6 290 195 3  

The above values are typical, and are not guaranteed.

[Applications]

  • ・General-purpose engine connecting rods
  • ・Farm-machine engine connecting rods
  • ・Bicycle parts

K3D (High-Toughness Die Casting Aluminum Alloys)

[Advantages]

Al-Si system alloy with good castability.
Excellent corrosion resistance.
Even if left as cast, the balance of strength and ductility is good, and heat treatment will further increase the strength.
The eutectic Si can also be modified, further enhancing the toughness.

[Alloy composition]

Al-8Si-Mg-Fe-Mn

[Applications]

  • ・Motorcycle wheels
  • ・General die casting parts requiring toughness and corrosion resistance

[Physical properties]

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Material Density

(g/cm3)

 Coefficient of thermal expansion

(X10-6)

 Liquidus temperature
(K)		 Solidus temperature
(K)		 Young's modulus
(GPa)
K3D 2.69 21.6 863 808 73
(Remarks) Room temperature 20-100℃ 590℃ 570℃ Room temperature

[Mechanical properties]

Swipe with your finger

Heat Treatment condition Tensile strength
(MPa)		 0.2% proof stress
(MPa)		 Elongation
(%)		 Hardness
(HB)		 Impact value
(J/cm2)
F 250 126 11.7 62 1.9
T6 286 223 6.2 96 1.3

The above values are typical, and are not guaranteed.

ST-K, ST-J, ST-H (High-Strength Wear-Resistant Die Casting Aluminum Alloys)

ST alloys are hypereutectic aluminum-silicon alloys for die castings with excellent wear resistance. The Si content has been optimized to get homogeneous and fine primary Si, providing excellent wear resistance, toughness, and strength.

[Advantages]

These alloys can be selected according to requirements for strength, corrosion resistance, and thermal conductivity, as well as wear resistance.
The homogeneity of the grain sizes of the fine primary Si has been improved.
Excellent fluidity and castability, giving improved die-casting productivity.
Compared to JIS ADC14, the melting and casting temperatures can be decreased, which reduces the energy requirements for production.

[Alloy composition]

Al-(13 to 15)Si-(Cu)-Fe

[Applications]

  • ・Automatic transmission valve bodies
  • ・Sliding components such as automotive compressors, etc.
  • ・Wear-resistant transmission components such as shift forks

[Physical properties]

Swipe with your finger

Material Thermal conductivity
(W/m･k)		 Coefficient of thermal expansion

(X10-6/K)

 Liquidus temperature
(℃)		 Solidus temperature
(℃)		 Density

(g/cm2)

 Electrical conductivity
(IACS%)		 Young's modulus
(GPa)
ST-K 98 20.1 601 537 2.76 22 86.9
ST-J 118 19.9 601 545 2.7 25 83.1
ST-H 110 19.8 607 543 2.72 22 83.6
(Remarks)
ADC12		 111 20.9 561 515 2.71 25 79.8

[Mechanical properties]

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Material Heat Treatment condition Tensile strength
(MPa)		 0.2% proof stress
(MPa)		 Elongation
(%)		 Hardness
(HB)
ST-K F 324 - 0.1 79
T5 345 - 0.1 87
ST-J F 329 215 0.6 72
T5 369 321 0.4 81
ST-H F 319 172 1.2 64
T5 336 253 0.4 72
(Remarks)
ADC12		 F 216 0.1 85
T5 311 0.1 116

The above values are typical, and are not guaranteed.

AD-U1, AD-U2(Die Casting Aluminum Alloys for Thin-Walled Products)

[Advantages]

Die casting aluminum alloys with excellent fluidity for thin-walled products.
AD-U1 aluminum alloys have good die-casting properties, achieved by further improving the excellent castability of JIS ADC12. AD-U2 die casting aluminum alloys based on JIS ADC1 have improved thermal conductivity. They also have excellent corrosion resistance.
These alloys can be selected according to requirements for strength, corrosion resistance, and thermal conductivity.

[Alloy composition]

Al-12Si-(Cu)-Fe

[Applications]

  • ・Computer-related cases
  • ・Motor cases
  • ・Electric component frames and cases

[Physical properties]

Swipe with your finger

Material Thermal conductivity
(W/m･k)		 Coefficient of thermal expansion

(X10-6/K)

 Liquidus temperature
(℃)		 Solidus temperature
(℃)		 Density

(g/cm2)

 Electrical conductivity
(IACS%)		 Young's modulus
(GPa)
AD-U1 125 21.2 560 520 2.70 27 79.9
AD-U2 167 20.5 560 543 2.66 33 79.6
(Remarks)
ADC12		 111 20.9 561 515 2.71 25 79.8

[Mechanical properties]

Swipe with your finger

Material Heat Treatment condition Tensile strength
(MPa)		 0.2% proof stress
(MPa)		 Elongation
(%)		 Hardness
(HB)
AD-U1 F 224 101 1 78
AD-U2 F 150 68 3 52
(Remarks)
ADC12		 F 216 0.1 85

The above values are typical, and are not guaranteed.

[Molten metal fluidity]

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Material Flow length
(mm)
670℃ 700℃ 730℃
AD-U1 830 890 1020
AD-U2 735 800 870
(Remarks)
ADC12		 695 740 820

The above values are typical, and are not guaranteed.

Castone SG alloys(Die Casting Alloys for Anodizing)

[Advantages]

Die casting alloys for anodizing with excellent decorative properties and corrosion resistance.

[Alloy composition]

Al-Mn-Co alloys

[Mechanical properties]

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Material Tensile strength
(MPa)		 0.2% proof stress
(MPa)		 Elongation
(%)		 Hardness
(HB)
Castone
SG alloys		 120 70 29 30

The above values are typical, and are not guaranteed.

[Applications]

  • ・Building materials
  • ・Building metal fittings
  • ・Fishing reels, etc.

High Electrical Resistivity Alloys(For Alloys Developed for High Electrical Resistivity for Cage Rotors, The Following Three Systems Are Available)

1. Alloys in the DMC Series (Al-Mn-Cr-Fe-system alloys)

Electrical conductivity: 18 to 38% IACS

2. Alloys in the AAE Series (Al-Mn-Ti-system alloys)

Electrical conductivity: 22 to 34% IACS

3. Alloys in the RD Series (Al-Si-(Mn)-(Cr)-(Ti)-system alloys)

Electrical conductivity: 22 to 28% IACS

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