STC48
STC48 is a designation in JIS for the material held under material number 1.7362, also listed as 12 CrMo 19 5. It is a material in the category Hydrogen resistant steels. We list 48 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, ASTM, BS, AFNOR, JIS, GB, GOST, UNI, ČSN, PN, MSZ and STAS.
If you came for one of these
The most-used names for this grade.About Hydrogen resistant steels
Hydrogen resistant steels are steels designed to withstand hydrogen-related damage, including hydrogen embrittlement and hydrogen attack. They are used for pressure vessels, piping and process equipment exposed to hydrogen-containing environments, where resistance to hydrogen ingress and loss of toughness is important.
This describes the material class as a whole. Always confirm the individual grade against the standard before ordering.
Also known as
48 designations · 14 standards · nothing hiddenEvery designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here.
Chemical composition
10 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 |
|---|---|
0.1–0.15 | |
≤ 0.5 | |
0.3–0.6 | |
0.02 | |
0.005 | |
4–6 | |
0.45–0.65 | |
0.3 | |
≤ 0.3 | |
0.012 |
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 | 0,10-0,15 | 0.100 | 0.150 | Range |
| N | 0,012 | 0.012 | 0.012 | Exact |
| Si | ≤0,50 | — | 0.500 | Max |
| P | 0,02 | 0.020 | 0.020 | Exact |
| S | 0,005 | 0.005 | 0.005 | Exact |
| Cr | 4,00-6,00 | 4.000 | 6.000 | Range |
| Mn | 0,30-0,60 | 0.300 | 0.600 | Range |
| Ni | 0,3 | 0.300 | 0.300 | Exact |
| Cu | ≤0,30 | — | 0.300 | Max |
| Mo | 0,45-0,65 | 0.450 | 0.650 | 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
5 conditions · 44 valuessteelnumber| Thicknessmm | ReHN/mm² | RmN/mm² |
|---|---|---|
| ≤ 60 | 320 | 510 – 690 |
| 60 – 150 | — | 480 – 660 |
| 60 – 250 | 300 | — |
| 150 – 250 | — | 450 – 630 |
splav| Delivery state | RmN/mm² | ReN/mm² | A5% | Z% | KCUkJ/m² | HB |
|---|---|---|---|---|---|---|
| Pipe hot strain, GOST 550-75 | 392 | 216 | 22 | 50 | 1180 | — |
| 15Kh5M ( 15Х5М ) (hot-rolled, annealing) , GOST 20072-74 | — | — | — | — | — | 217 |
| 15Kh5M ( 15Х5М ) , Pipe GOST 550-75 | — | — | — | — | — | 170 |
splav| Dimensionmm | RmN/mm² | ReN/mm² | A5% | Z% | KCUkJ/m² |
|---|---|---|---|---|---|
| Ø 90 | 390 | 215 | 22 | 50 | 1180 |
splav| Heat-treated condition | RmN/mm² | ReN/mm² | A5% |
|---|---|---|---|
| Sheet trick, GOST 7350-77 | 470 | 235 | 18 |
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 | 7.75 | 211 | — | — | — | 430 |
| 100 | 7.73 | — | 11.3 | 37 | 483 | — |
| 200 | 7.7 | — | 11.6 | 36 | — | — |
| 300 | 7.67 | — | 11.9 | 35 | — | — |
| 400 | 7.64 | 178 | 12.2 | 34 | — | — |
| 500 | 7.61 | 145 | 12.3 | 33 | — | — |
| 600 | 7.58 | 102 | 12.5 | — | — | — |
1 further values are held for this grade under a condition the source did not name — a bound with no quantity attached. They are withheld rather than shown against a guessed condition.
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
GB 2100-1980
- Quenching1150–1180 °CCooling Water
- Ageing485–570 °CCooling Air
The source lists these operations without stating an order or an alternation. They are shown unordered on purpose.
Source: www.caishuku.com
Looking for this grade under another name?
Search the catalogue by designation, material number or composition — every name on this page is itself a way in.