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title: "Material 1.3390 — High-speed steels"
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# 1.3390

1.3390 is the material number this entry is held under. It is a material in the category High-speed steels.

- ***Material no.* **1.3390****
- [*Category* **High-speed steels · 59 grades**](/categories/high-speed-steels "Category: High-speed steels · 59 grades")

[Search](/search "Steel grade search")[Inquiry](/inquiry?material=b0e4bc64-2739-4bb0-a408-86425106d267 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.3390.pdf "Datasheet as PDF")

## About High-speed steels

High-speed steels are alloyed tool steels designed to retain hardness and cutting ability when tools heat up during high-speed machining. Their hot hardness and wear resistance make them suitable for cutting tools such as drills, milling cutters, taps and broaches.

This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.

## Chemical composition

 5 elements on file · weight %

What this alloy is

Fe W Cr Mo

Iron — the balance, never listed by a standard — 83.8 % W — 6.3 % Cr — 4 % Mo — 3 % Traces & impurities · 2.9 %

Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade.

| Element | % by weight |
|---|---|
| C | 0.88 |
| Cr | 4 |
| Mo | 3 |
| V | 2 |
| W | 6.3 |

Carbon Chromium Molybdenum Vanadium Tungsten

0.01 % 0.1 % 1 % 10 % 100 %

The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other.

| Element | As published source text, verbatim | Min% by weight | Max% by weight | Bound |
|---|---|---|---|---|
| C | 0,88 | 0.880 | 0.880 | Exact |
| V | 2 | 2.000 | 2.000 | Exact |
| Cr | 4 | 4.000 | 4.000 | Exact |
| Mo | 3 | 3.000 | 3.000 | Exact |
| W | 6,3 | 6.300 | 6.300 | Exact |

The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred.

## Predicted transformation temperatures

Not enough recorded composition to predict a transformation temperature for this grade — missing: Mn, Si, Ni.

## Physical & mechanical properties

Density 7,85 g/cm³ Exact

An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material.

## Similar grades — and why

Selection rule, stated so you can disagree with it: same number class 1.3, a shared category, and a published range for W / Cr that overlaps this grade’s. These are neighbours in composition space — they are not equivalents, and none is claimed to be interchangeable with this grade.

[1.3243 1.3243

W 5,90-6,70 · Cr 3,80-4,50

- ΔW 0.00
- ΔCr 0.15
- 49 designations](/materials/material-no/1.3243 "1.3243")[HS6-5-3-8 1.3244

W 5,90-6,70 · Cr 3,80-4,50

- ΔW 0.00
- ΔCr 0.15
- 1 designations](/materials/din-en/hs6-5-3-8 "HS6-5-3-8")[PMHS6-5-3-8 1.3294

W 5,90-6,70 · Cr 3,80-4,50

- ΔW 0.00
- ΔCr 0.15
- 2 designations](/materials/din-en/pmhs6-5-3-8 "PMHS6-5-3-8")[HS 6-5-2 1.3339

W 5,90-6,70 · Cr 3,80-4,50

- ΔW 0.00
- ΔCr 0.15
- 21 designations](/materials/din-en/hs6-5-2 "HS 6-5-2")[1.3343 1.3343

W 5,90-6,70 · Cr 3,80-4,50

- ΔW 0.00
- ΔCr 0.15
- 46 designations](/materials/material-no/1.3343 "1.3343")[HS6-5-3C 1.3345

W 5,90-6,70 · Cr 3,80-4,50

- ΔW 0.00
- ΔCr 0.15
- 1 designations](/materials/din-en/hs6-5-3c "HS6-5-3C")

## Looking for this grade under another name?

Search the catalogue by designation, material number or composition — every name on this page is itself a way in.

[Search](/search "Steel grade search")[Inquiry](/inquiry?material=b0e4bc64-2739-4bb0-a408-86425106d267 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/material-no/1.3390.pdf "Datasheet as PDF")