C76D
C76D is a material in the category Spring steels, held under material number 1.0614. Its recorded composition includes C 0.73–0.78%, Si 0.1–0.3%, Mn 0.5–0.8%, Ni ≤ 0.2% and Cu ≤ 0.25%. We list 7 designations recorded for this grade, in the standards UNS, AISI / SAE, GB, GOST and BDS. Recorded mechanical properties include Rm 1080 N/mm², Re 885 N/mm², A5 9%, HB 241–285 and Z 30%; these figures vary with the delivery condition and dimension. Its recorded density is 7.85 g/cm³. Further recorded physical values: E 191 GPa. Recorded transformation points: Ac1 720 °C, Ac3 735 °C and Ar1 700 °C. It is recorded as not intended for welding.
- Material no. 1.0614
- Category Spring steels · 52 grades
- Designations 8
If you came for one of these
The most-used names for this grade.About Spring steels
Spring steels are alloy steels designed to store and release elastic energy repeatedly without permanent deformation. They are characterised by a combination of strength, hardness and resilience, making them suitable for springs, clips, washers and other components subjected to repeated flexing or shock.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Also known as
8 designations · 6 standards · nothing hidden- C76DThis grade’s own name
Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.
Chemical composition
10 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 |
|---|---|
0.73–0.78 | |
0.1–0.3 | |
0.5–0.8 | |
0.03 | |
0.03 | |
≤ 0.15 | |
≤ 0.05 | |
≤ 0.2 | |
≤ 0.25 | |
≤ 0.01 |
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 | 0,73-0,78 | 0.730 | 0.780 | Range |
| Al | ≤0,01 | — | 0.010 | Max |
| Si | 0,10-0,30 | 0.100 | 0.300 | Range |
| P | 0,03 | 0.030 | 0.030 | Exact |
| S | 0,03 | 0.030 | 0.030 | Exact |
| Cr | ≤0,15 | — | 0.150 | Max |
| Mn | 0,50-0,80 | 0.500 | 0.800 | Range |
| Ni | ≤0,20 | — | 0.200 | Max |
| Cu | ≤0,25 | — | 0.250 | Max |
| Mo | ≤0,05 | — | 0.050 | Max |
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
This grade's composition falls outside the published model's validated range (a low-alloy composition window), so no transformation temperature is predicted here.
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
3 conditions · 7 valuessplav| Delivery state | HB |
|---|---|
| (without heat treatment) , Rolled stock GOST 14959-79 | 285 |
| (heat treatment) , Rolled stock GOST 14959-79 | 241 |
splav| Heat-treated condition | RmN/mm² | ReN/mm² | A5% | Z% |
|---|---|---|---|---|
| Rolled stock, GOST 14959-79 | 1080 | 885 | 9 | 30 |
splav| Temperature°C | Elastic modulusGPa |
|---|---|
| 20 | 191 |
Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ.
Similar grades — and why
Selection rule, stated so you can disagree with it: same number class 1.0, a shared category, and a published range for Mn / Si 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.
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.