Material 1.

Hot work tool steel

Material 1. - versatile tool steel for hot work

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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.

The chemical composition of material 1. is:

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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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ISO 1. - X37CrMoV5-1 0.33 - 0.41 0.25 - 0.50 0.8 - 1.2 <0.03 <0.02 4.8 - 5.5 1.1 - 1.5 0.3 - 0.5 PN WCL 0.32 - 0.42 0.20 - 0.50 0.8 - 1.2 <0.03 <0.03 4.5 - 5.5 1.2 - 1.5 0.3 - 0.5 ASTM AISI H11 - UNS T 0.33 - 0.43 0.20 - 0.60 0.80 - 1.25 <0.03 <0.03 4.75 - 5.50 1.1 - 1.6 0.3 - 0.6 ISO 1. - X40CrMoV5-1 0.35 - 0.42 0.25 - 0.50 0.8 - 1.2 <0.03 <0.02 4.8 - 5.5 1.2 - 1.5 0.85 - 1.15 PN WCLV 0.35 - 0.45 0.20 - 0.50 0.8 - 1.2 <0.03 <0.03 4.5 - 5.5 1.2 - 1.5 0.8 - 1.1 ASTM AISI H13 - UNS T