SCH42
SCH42 is a material in the category Heat-resistant cast steels. Its recorded composition includes C 0.35–0.55%, Si 1–2.5%, Cr 27–30%, Ni 47–50% and W 4–6%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include Rm 400 N/mm², Re 220 N/mm² and A 3%.
- Category Heat-resistant cast steels · 82 grades
- Designations 1
About Heat-resistant cast steels
Heat-resistant cast steels are cast ferrous alloys formulated for service at elevated temperatures, where resistance to softening and thermal degradation is important. They are used for furnace components, heat-treatment equipment and other high-temperature plant parts that require cast shapes and dependable mechanical performance during heating.
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 |
|---|---|
0.35–0.55 | |
1–2.5 | |
≤ 1.5 | |
≤ 0.04 | |
≤ 0.03 | |
27–30 | |
≤ 0.5 | |
47–50 — | |
4–6 |
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 | 0.35 - 0.55 | 0.350 | 0.550 | Range |
| Si | 1 - 2.5 | 1.000 | 2.500 | Range |
| P | max 0.04 | — | 0.040 | Max |
| S | max 0.03 | — | 0.030 | Max |
| Cr | 27 - 30 | 27.000 | 30.000 | Range |
| Mn | max 1.5 | — | 1.500 | Max |
| Ni | 47 - 50 | 47.000 | 50.000 | Range |
| Mo | max 0.5 | — | 0.500 | Max |
| W | 4 - 6 | 4.000 | 6.000 | 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
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
1 conditions · 3 valuessteeljis| Delivery state | RmN/mm² | ReN/mm² | A% |
|---|---|---|---|
| Casting | 400 | 220 | 3 |
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.
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