SDP4
SDP4 is a grade designated under JIS. Its recorded composition includes C ≤ 0.08%, Si ≤ 1%, Cr 18–20%, Mn ≤ 2% and Ni 8–10.5%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include Rm 520 N/mm², Re 235 N/mm² and A 40%.
- Designations 1
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 |
|---|---|
≤ 0.08 | |
≤ 1 | |
≤ 2 | |
≤ 0.045 | |
≤ 0.03 | |
18–20 | |
8–10.5 |
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 | max 0.08 | — | 0.080 | Max |
| Si | max 1 | — | 1.000 | Max |
| P | max 0.045 | — | 0.045 | Max |
| S | max 0.03 | — | 0.030 | Max |
| Cr | 18 - 20 | 18.000 | 20.000 | Range |
| Mn | max 2 | — | 2.000 | Max |
| Ni | 8 - 10.5 | 8.000 | 10.500 | 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: 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.
Looking for this grade under another name?
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