SNCM420RCH
SNCM420RCH is a material in the category Cold extrusion steels. Its recorded composition includes C 0.17–0.23%, Si 0.15–0.35%, Cr 0.4–0.6%, Mn 0.4–0.7% and Ni 1.6–2%. No cross-standard equivalents are recorded for this grade yet.
- Category Cold extrusion steels · 156 grades
- Designations 1
About Cold extrusion steels
Cold extrusion steels are engineering materials designed to be shaped into components by cold forming and extrusion. They combine the ductility needed for substantial plastic deformation with the strength and toughness required in cold-formed fasteners, automotive parts and other precision components.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Chemical composition
9 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 | |
0.15–0.35 | |
0.4–0.7 | |
≤ 0.03 | |
≤ 0.03 | |
0.4–0.6 | |
0.15–0.3 | |
1.6–2 | |
≤ 0.3 |
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 | 0.15 - 0.35 | 0.150 | 0.350 | Range |
| P | max 0.03 | — | 0.030 | Max |
| S | max 0.03 | — | 0.030 | Max |
| Cr | 0.4 - 0.6 | 0.400 | 0.600 | Range |
| Mn | 0.4 - 0.7 | 0.400 | 0.700 | Range |
| Ni | 1.6 - 2 | 1.600 | 2.000 | Range |
| Cu | max 0.3 | — | 0.300 | Max |
| Mo | 0.15 - 0.3 | 0.150 | 0.300 | 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
computed from composition · °CThese four temperatures are a CALCULATION from this grade's own composition, using the published Li, Niebuhr, Meekisho & Atteridge (1998) model — never a measurement, and computed from the UPPER BOUND of each element's specified range, not a mid-range figure. Where this grade also has a measured transformation point (Ac1, Ac3, Ar1, Ar3) on file, it is shown separately, in Physical & mechanical properties, and is never replaced by the predicted figures here — Ae (predicted, equilibrium) and Ac/Ar (measured, on heating or cooling) are different physical quantities and can differ by tens of degrees; a mismatch between the two is not an error in either.
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.
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