ст.15Х
ст.15Х is a designation in GOST for the material held under material number 1.7015, also listed as 15Cr3. It is a material in the category Case hardening steels. We list 36 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, UNE, JIS, GB, GOST, ČSN, PN, STAS, BDS, NBN and KS.
If you came for one of these
The most-used names for this grade.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.
Also known as
36 designations · 16 standards · nothing hiddenEvery designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.
Chemical composition
7 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 |
|---|---|
0.12–0.18 | |
0.15–0.4 | |
0.4–0.6 | |
0.035 | |
0.035 | |
0.4–0.7 | |
≥ 0.02 |
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 | 0,12-0,18 | 0.120 | 0.180 | Range |
| Al | (≥0,02) | 0.020 | — | Min |
| Si | 0,15-0,40 | 0.150 | 0.400 | Range |
| P | 0,035 | 0.035 | 0.035 | Exact |
| S | 0,035 | 0.035 | 0.035 | Exact |
| Cr | 0,40-0,70 | 0.400 | 0.700 | Range |
| Mn | 0,40-0,60 | 0.400 | 0.600 | 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.
Heat treatment
GJB 1220
- Quenching860 °C
- Quenching780 °CCooling Water
- Tempering200 °CCooling Air
Supply condition
- Normalizing and Temperingd≤100
- Carburizing
- Quenching
- Quenching and Temperingd=15
- Annealing and Tempering and NormalizingSupply condition
- Spheroidize annealingPlate and Strip
- Annealing or TemperingSteel product
- Annealing
Conditions the standard permits on delivery. No temperature or medium is published for these, so no order and no alternation is implied.
Source: www.caishuku.com
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 0,50-0,70 · Mn 0,60-0,80
- ΔCr 0.05
- ΔMn 0.20
- 2 designations
Cr 0,40-0,70 · Mn 0,60-0,90
- ΔCr 0.00
- ΔMn 0.25
- 3 designations
Cr 0,40-0,70 · Mn 0,60-0,90
- ΔCr 0.00
- ΔMn 0.25
- 3 designations
Cr 0,40-0,60 · Mn 0,60-0,90
- ΔCr 0.05
- ΔMn 0.25
- 5 designations
Cr 0,40-0,60 · Mn 0,60-0,90
- ΔCr 0.05
- ΔMn 0.25
- 2 designations
Cr 0,65-0,80 · Mn 0,60-0,75
- ΔCr 0.18
- ΔMn 0.18
- 5 designations
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.