20CrS4
20CrS4 is a material in the category Case hardening steels, held under material number 1.7028. Its recorded composition includes C 0.17–0.23%, Si ≤ 0.4%, P 0.035%, Cr 0.9–1.2% and Mn 0.6–0.9%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include HB 197. Its recorded density is 7.85 g/cm³.
About Case hardening steels
Case hardening steels are steels designed to develop a hard, wear-resistant surface while retaining a tough and ductile core. They are used for components such as gears, shafts and other machine parts exposed to contact wear and cyclic loading.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Chemical composition
6 elements on file · weight %What this alloy is
Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade.
| Element | % by weight |
|---|---|
0.17–0.23 | |
≤ 0.4 | |
0.6–0.9 | |
0.035 | |
0.02–0.035 | |
0.9–1.2 |
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 publishedsource text, verbatim | Min% by weight | Max% by weight | Bound |
|---|---|---|---|---|
| C | 0,17-0,23 | 0.170 | 0.230 | Range |
| Si | ≤0,40 | — | 0.400 | Max |
| P | 0,035 | 0.035 | 0.035 | Exact |
| S | 0,020-0,035 | 0.020 | 0.035 | Range |
| Cr | 0,90-1,20 | 0.900 | 1.200 | Range |
| Mn | 0,60-0,90 | 0.600 | 0.900 | Range |
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: Ni, Mo.
Physical & mechanical properties
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.
Properties by condition
0 conditions · 0 values3 further values are held for this grade under a condition the source did not name — a bound with no quantity attached. They are withheld rather than shown against a guessed condition.
Similar grades — and why
Selection rule, stated so you can disagree with it: same number class 1.7, a shared category, and a published range for Cr / Mn 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.
Cr 0,90-1,20 · Mn 0,60-0,90
- ΔCr 0.00
- ΔMn 0.00
- 25 designations
Cr 0,90-1,20 · Mn 0,60-0,90
- ΔCr 0.00
- ΔMn 0.00
- 7 designations
Cr 0,90-1,20 · Mn 0,60-0,90
- ΔCr 0.00
- ΔMn 0.00
- 23 designations
Cr 0,90-1,20 · Mn 0,60-0,90
- ΔCr 0.00
- ΔMn 0.00
- 3 designations
Cr 0,70-1,00 · Mn 0,60-0,90
- ΔCr 0.20
- ΔMn 0.00
- 2 designations
Cr 0,70-1,00 · Mn 0,60-0,90
- ΔCr 0.20
- ΔMn 0.00
- 36 designations
Looking for this grade under another name?
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