KAL 13

KAL 13 (H13/ W.Nr. 1.2344/X40CrMoV5-1)

  • KAL 13 grade gives an excellent combination of hot strength, wear resistance and toughness.
  • Durable mechanical properties in thermal cycling.
  • Hardness retention at high temperature, high resilience.
  • Excellent for plastic moulds used at temperature > 300°C and for casting dies operated at temperature of the order of 500°C.
  • Good compressive strength for extrusion dies with pressure ~300MPa. With excellent combination of thermal fatigue and toughness it can be used for hot forging dies.


Forging Dies | Die casting dies | Punches Cores and Inserts | Shot sleeves Shear blades for hot work | Piercers & Mandrels for hot work | Hot extrusion tooling | All types of dies for hot work involving shock | Ultra-high strength structural parts | Plastic mould dies

Physical Properties

Thermal conductivity (W/mK) @25°C
Coeffcient of Thermal Expansion (10-6/K) 
Specific Heat J/Kg°C

Non Metallic Inclusions (ASTM E45)

 A (Max)B (Max)C (Max)D (Max)
Saarloha Guarantee1.

Equivalent Grades of KAL13

StandardASTMA68I-08EN ISO 4957:1999JIS G4404ISO 4957:1999
 Alloy Tool SteelTool SteelAlloy Tool SteelTool Steel

Typical Saarloha Chemical Composition


Heat Treatment

PreheatingHeating at a rate less than 160°C/h to 650°C. Equalize and raise the temperature  to 815 to 870°C.
AnnealingHeating at a rate of 160°C to a temperature between 850-870°C. Hold for 60 min per 25mm thickness for minimum 2 hours. Then furnace cool at the rate of 100°C/h up to 550°C. Discharge from furnace and then cool in air. The resultant hardness will be of the order of 200 HB.
Stress relieving Heat slowly to 550°-676°C, allow equalization and the cool in a still air (Stress relieving).
AustenitizingFrom preheat temperature rapidly heat to a temperature between 980 to 1030°C. For higher toughness choose 980°C and for higher hardness, wear resistance and thermal fatigue resistance choose 1020°C. Soak for 30 min per inch followed by quenching in oil/pressurized gas.
TemperingTemper immediately after quenching in a temperature range of 540 to 640°C. Hold the sample for 1 hr/inch section thickness with minimum of 2 hrs followed by double tempering. The second tempering may be carried at a temperature of 10°C lesser than that of the first tempering.


Machinability of KAL 13 ranges from medium to high. Machining after hardening tempering should be avoided and limited to only finish machining.


KAL 13 has good ductility and may be formed by conventional means, i.e. machining and forging.


Hot forging temperature ranges from 1050-850°C.


This alloy is readily weldable by conventional methods.

Supply Condition

Spheroidized Annealed or Hardened and tempered condition or as per customer requirement.

Size Range

Bars : 20 -750 mm Dia

Blocks: 2 m X 1 m X 12 m max (max. Forging wt. 9 MT)