Tool steel grade 1., also known as AISI H11, is a type of hot-work tool steel that has found widespread use in various applications due to its excellent heat resistance, toughness, and wear resistance. This steel grade is considered to be one of the most versatile and widely used tool steels.

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The chemical composition of 1. steel includes carbon, chromium, molybdenum, vanadium, and silicon. The presence of these elements imparts high-temperature strength, toughness, and wear resistance to the steel, making it suitable for use in applications that involve high heat, pressure, and mechanical loads. And its chemical composition is as follows:

1. steel is commonly used for the production of hot-work tools such as forging dies, extrusion dies, punches, and mold inserts. These tools are subjected to high temperatures, pressure, and mechanical stress, and therefore require a material that is reliable and can withstand these conditions. The high degree of toughness and heat resistance of 1. steel makes it ideal for such applications.

Material 1.

Hot work tool steel

Material 1. - versatile tool steel for hot work

The material 1. (X37CrMoV5-1) belongs to the group of tool steels and to the subgroup tool steel for hot work.

Typical applications for the material 1. are:

- Die casting tools as well as ingot molds in light metal processing.
- Tools in extrusion plants
- Dies and die inserts in forging shops
- Mandrel bars for the production of seamless tubes
- Plastic molds, mold inserts
- Extruder screws, extruder barrels
- Ejector pins
- Die holders, chucks
- reinforcement rings

Material 1.- what characterizes this steel

This tool steel for hot work is a chromium-molybdenum-vanadium alloy.

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The chemical composition of material 1. is:

C: 0,37 %
Si: 1.00 %
Mn: 0,40 %
Cr: 5.30 %
Mo: 1.30 %
V: 0,40 %

The alloy exhibits first-class toughness, good thermal shock resistance, high high-temperature strength and good hot wear resistance.
An essential factor in the manufacturing process of heavily loaded tools is proper heat treatment. Tempering twice allows the microstructural transformation to complete. For maximum toughness, three times of tempering is recommended.
This procedure reduces the risk of premature tool wear.

Machining of material 1.

1) Recommendation for case hardening of tool steel for hot work according to material number 1.

The following guide values for hardness in the as-built condition apply to various fields of application:

- Casting tools for die casting 44-52 HRC, low pressure die casting and gravity die casting 300-360 HB.
- Dies for extrusion of light metal 34-50 HRC and steel 34-48 HRC
- Die forging tools 41-54 HRC
- Molds for glass processing 180-230 HB
- Mandrel bars for pipe manufacturing 266-375 HB
- Tools for plastics processing 40-54 HRC
- Tool holders 48-54 HRC

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