12Cr21Ni5Ti
12Cr21Ni5Ti is a grade designated under GB. Its recorded composition includes C 0.09–0.14%, Si ≤ 0.8%, Cr 20–22%, Mn ≤ 0.8% and Ni 4.8–5.8%. No cross-standard equivalents are recorded for this grade yet. Further recorded physical values: E 148–187 GPa, λ 16.6–23 W/(m·K), α 10–17.4 ·10⁻⁶/K and ρ el. 790 nΩ·m; several of these are temperature-dependent.
- 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 |
|---|---|
0.09–0.14 | |
≤ 0.8 | |
≤ 0.8 | |
≤ 0.035 | |
≤ 0.03 | |
20–22 | |
4.8–5.8 |
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 | 0.09-0.14 | 0.090 | 0.140 | Range |
| Si | ≤0.8 | — | 0.800 | Max |
| P | ≤0.035 | — | 0.035 | Max |
| S | ≤0.03 | — | 0.030 | Max |
| Cr | 20-22 | 20.000 | 22.000 | Range |
| Mn | ≤0.8 | — | 0.800 | Max |
| Ni | 4.8-5.8 | 4.800 | 5.800 | 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.
Properties by condition
1 conditions · 13 valuescaishuku| Temperature°C | Elastic modulusGPa | Thermal expansion coefficient10^-6/K | Thermal conductivityW/(m·K) |
|---|---|---|---|
| 20 | 187 | — | — |
| 100 | 174 | 10 | 17.6 |
| 200 | 172 | 13.7 | — |
| 300 | 167 | 16.8 | — |
| 400 | 157 | 16.7 | — |
| 500 | 148 | 17.4 | 23 |
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.
Heat treatment
GJB 2294
- QuenchingTemperature not stated
- Solution annealing950–1050 °CCooling Water
- TemperingTemperature not stated
- Ageing550 °CCooling Furnace or Air
The source lists these operations without stating an order or an alternation. They are shown unordered on purpose.
- A · QuenchingTemperature not stated
- B · Solution annealing950–1050 °CCooling Air
Source: www.caishuku.com
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