ThePipingMart Blog Grades H23 Tool Steel (UNS T20823) – Composition, Properties and Uses

H23 Tool Steel (UNS T20823) – Composition, Properties and Uses

Tool Steel H23

Tool steel H23 is a high-speed, air-hardening tool steel. UNS T20823 has very good wear resistance and toughness properties, making H23 Tool Steel an ideal choice for a variety of applications. Regarding H23 Tool Steel (UNS T20823) is a reliable option for tool steel with its impressive composition and properties. Developed with a combination of tungsten, molybdenum, and chromium, this steel is classified as high-speed steel due to its ability to function at high temperatures. The SAE-AISI H23 steel, in particular, is apt at cutting through tough materials and boasts resistance against deformation and wear. It’s a versatile tool for various applications, from machining to cold extrusion. For those looking for an effective tool steel for their project, H23 Tool Steel is certainly one to consider. In this article, we’ll explore Tool Steel H23’s uses, corrosion and heat resistance properties, heat treatment methods, and machining techniques.

What Forms of H23 Tool Steel is Available at Piping Mart?

  • Nut
  • Bar
  • Bolt
  • Pipe
  • Screw
  • Tubing
  • Valves
  • Washers
  • Flanges
  • Fasteners
  • Electrodes
  • Stud Bolts
  • Sheet Plates
  • Pipe Fittings
  • Forged Fitting
  • Instrumentation Fittings

H23 Tool Steel Composition

Element Content (%)
C 0.25-0.35
Mn 0.15-0.40
Si 0.15-0.60
Cr 11.00-12.75
Ni 0.3
W 11.00-12.75
V 0.75-1.25
Cu 0.25
P 0.03
S 0.03

H23 Tool Steel Physical Properties

Properties Conditions
T (°C) Treatment
Density 7.7-8.03 x 1000 kg/m3 25

H23 Tool Steel Mechanical Properties

Properties Conditions
T (°C) Treatment
Poisson’s ratio 0.27-0.30 25
Elastic modulus 27557-30458 ksi 25

H23 Tool Steel Equivalent

  • ASTM A681
  • UNS T20823
  • DIN 1.2625
  • FED QQ-T-570

H23 Tool Steel Uses

Tool Steel H23 can be used to create cutting tools such as drill bits, taps and dies. Its high wear resistance makes it a great choice for these applications where precision and durability are essential. It is also often used to create other machine parts, such as gears and shafts, that need strength and reliability.

H23 Tool Steel Uses in Industries

Automotive Industry

H23 tool steel is commonly used in the automotive industry for its high strength and wear resistance properties. It is often used to make crankshafts, gears, and bearings subjected to high stress levels and friction.

Aerospace Industry

The aerospace industry also utilizes H23 tool steel for its strength and durability. This type of steel is commonly used to produce aircraft engine components, landing gear parts, and other critical components that require high strength and resistance to extreme temperatures.

Oil and Gas Industry

H23 tool steel is a popular choice in the oil and gas industry due to its corrosion resistance and ability to withstand harsh environments. It is often used in drilling equipment, valves, pumps, and other components that are exposed to corrosive substances.

Manufacturing Industry

H23 tool steel is widely used in the manufacturing industry for its versatility and machinability. It can be easily shaped into various forms, making it ideal for producing punches, dies, cutting tools, and moulds.

Construction Industry

H23 tool steel finds applications in the construction industry due to its high strength-to-weight ratio. It is commonly used to produce heavy-duty equipment such as cranes, excavators, bulldozers, and other construction machinery.

Medical Industry

Due to its biocompatibility and resistance to corrosion from bodily fluids, H23 tool steel is also utilized in the medical industry for surgical instruments and implants. Its high strength also makes it suitable for use in orthopaedic devices such as bone screws and plates.

H23 Tool Steel Corrosion Resistance

Tool Steel H23 offers excellent corrosion resistance due to its high chromium content, which helps protect against rust and oxidation. This makes it an ideal choice for applications that require long-term exposure to moisture or extreme temperatures. The addition of molybdenum further enhances the corrosion resistance of this metal alloy.

H23 Tool Steel Heat Resistance

Tool Steel H23 has excellent heat resistance properties due to its high chromium content, which helps protect against oxidation at elevated temperatures. This makes it an ideal choice for applications that require exposure to extreme temperatures, such as hot forging or die-casting operations. The addition of molybdenum further enhances the heat resistance of this metal alloy by providing improved oxidation protection at higher temperatures.

H23 Tool Steel Heat Treatment

The most common heat treatment method for Tool Steel H23 is hardening & tempering (H&T). This process involves heating the metal slowly in order to relieve any internal stresses before cooling it quickly in order to harden the material’s surface layer while leaving the core soft & ductile (known as tempering). This process allows for improved wear & tear resistance while maintaining ductility & toughness within the core material structure.

H23 Tool Steel Machining

When machining with Tool Steel H 23, it is important to use sharp cutting tools in order to produce clean edges with minimal burrs or chips on the workpiece surface. High-speed steel (HSS) cutting tools are recommended as they will retain their edge longer than standard carbon steel tools when used on harder materials like tool steel alloys. It is also important to use coolant while machining in order reduces friction & tool wear while improving chip evacuation from the workpiece surface during machining operations.


As you can see, Tool Steel H 23 offers a variety of benefits, including excellent corrosion & heat resistance along with good wear properties, which make it suitable for a wide range of applications from cutting tools to machine parts such as gears & shafts that require strength & durability over time. With proper heat treatment methods & machining techniques applied, this type of tool steel can be used in many different ways depending on your specific needs!

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