X 12 CrNi 18 8
X 12 CrNi 18 8 is a material in the category Stainless steels, held under material number 1.4300. We list 75 designations recorded for this grade, in the standards UNS, AISI / SAE, ASTM, BS, AFNOR, UNE, SAE AMS, JIS, GB, GOST, UNI, SS, ČSN, PN and ABNT NBR. Its recorded composition includes C ≤ 0.12%, Si ≤ 1%, Cr 17–19%, Mn ≤ 2% and Ni 8–10%. Recorded mechanical properties include Rm 490–1230 N/mm², Re 195–215 N/mm², A 40%, HB 179–187 and Z 40–60%; these figures vary with the delivery condition and dimension. Its recorded density is 7.56–7.9 g/cm³. Further recorded physical values: E 150–205 GPa, λ 15–26.8 W/(m·K), α 16.6–19.3 ·10⁻⁶/K, cp 504 J/(kg·K) and ρ el. 725–1117 nΩ·m; several of these are temperature-dependent. Its weldability is recorded as good.
- Material no. 1.4300
- Category Stainless steels · 468 grades
- Designations 76
If you came for one of these
The most-used names for this grade.About Stainless steels
Stainless steels are corrosion-resistant alloy steels whose chromium content promotes a protective passive surface film. They are used for equipment, structures and components exposed to moisture, chemicals or hygienic service, with different alloy compositions selected for corrosion resistance, strength, formability or weldability.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Also known as
76 designations · 16 standards · nothing hidden- X 12 CrNi 18 8This grade’s own nameWithdrawn
Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.
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 |
|---|---|
≤ 0.12 | |
≤ 1 | |
≤ 2 | |
0.045 | |
0.03 | |
17–19 | |
8–10 |
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 | ≤0,12 | — | 0.120 | Max |
| Si | ≤1,00 | — | 1.000 | Max |
| P | 0,045 | 0.045 | 0.045 | Exact |
| S | 0,03 | 0.030 | 0.030 | Exact |
| Cr | 17,0-19,0 | 17.000 | 19.000 | Range |
| Mn | ≤2,00 | — | 2.000 | Max |
| Ni | 8,00-10,0 | 8.000 | 10.000 | 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
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
6 conditions · 73 valuessplav| Delivery state | RmN/mm² | ReN/mm² | A5% | Z% | HB |
|---|---|---|---|---|---|
| Pipe cooling strain, GOST 9941-81 | 549 | — | 37 | — | — |
| Pipe hot strain, GOST 9940-81 | 529 | — | 40 | — | — |
| Bar cold-worked , GOST 18907-73 | 880 – 930 | — | — | — | — |
| Bar, GOST 18907-73 | 640 – 880 | — | 20 | — | — |
| Forging, GOST 25054-81 | 490 | 196 | 35 – 40 | 40 – 48 | — |
| Sheet thin cold-worked , GOST 5582-75 | 930 – 1230 | — | 13 | — | — |
| Sheet thin cold-worked , GOST 4986-79 | 980 | — | 3 – 5 | — | — |
| 12KH18N9 ( 12Х18Н9 ) , Forging GOST 25054-81 | — | — | — | — | 179 |
steeljis| Delivery state | RmN/mm² | ReN/mm² | A% | Z% |
|---|---|---|---|---|
| Bars/Rods | 520 | 205 | 40 | 60 |
splav| Dimensionmm | RmN/mm² | ReN/mm² | A5% | Z% |
|---|---|---|---|---|
| Ø 60 | 490 | 196 | 45 | 55 |
splav| Heat-treated condition | RmN/mm² | ReN/mm² | A5% |
|---|---|---|---|
| Sheet trick, GOST 7350-77 | 530 | 215 | 38 |
splav| Heat-treated condition | RmN/mm² | ReN/mm² | A5% |
|---|---|---|---|
| Sheet thin, GOST 5582-75 | 540 | 195 | 38 |
splav| Temperature°C | Densityg/cm³ | Elastic modulusGPa | Thermal expansion coefficient10^-6/K | Thermal conductivityW/(m·K) | Specific heat capacityJ/(kg·K) | Electrical resistivitynΩ·m |
|---|---|---|---|---|---|---|
| 20 | 7.9 | 205 | — | 15 | — | 725 |
| 100 | 7.86 | 202 | 16.6 | 16.3 | 504 | 792 |
| 200 | 7.82 | 197 | 17 | 17.5 | — | 860 |
| 300 | 7.78 | 190 | 17.2 | 18.8 | — | 920 |
| 400 | 7.74 | 181 | 17.5 | 21.3 | — | 976 |
| 500 | 7.69 | 173 | 17.9 | 23 | — | 1028 |
| 600 | 7.65 | 160 | 18.2 | 26.8 | — | 1070 |
| 700 | 7.6 | 150 | 18.6 | 25.9 | — | 1117 |
| 800 | 7.56 | — | 18.9 | — | — | — |
| 900 | — | — | 19.3 | — | — | — |
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.
Similar grades — and why
Selection rule, stated so you can disagree with it: same number class 1.4, a shared category, and a published range for Cr / Ni 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.
Cr 17,0-19,0 · Ni 8,00-10,0
- ΔCr 0.00
- ΔNi 0.00
- 77 designations
Cr 17,0-19,0 · Ni 8,00-10,0
- ΔCr 0.00
- ΔNi 0.00
- 51 designations
Cr 17,0-19,0 · Ni 8,50-10,5
- ΔCr 0.00
- ΔNi 0.50
- 16 designations
Cr 17,5-19,5 · Ni 8,00-10,5
- ΔCr 0.50
- ΔNi 0.25
- 170 designations
Cr 17,5-19,5 · Ni 8,00-10,5
- ΔCr 0.50
- ΔNi 0.25
- 88 designations
Cr 17,2-19,8 · Ni 7,60-9,40
- ΔCr 0.50
- ΔNi 0.50
- 1 designations
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