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![Heat-resistant cast steels](/images/uploads/15c66493-abc0-42e8-a531-2ac188ed257b/heat-resistant-cast-steels-category-furnace-grate-1920x1080.jpg)

Category · 82 grades

# 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.

| Grade | Material no. | C | Si | Cr | Mn | P | S |
|---|---|---|---|---|---|---|---|
| [SSC14A](/materials/ks/ssc14a "SSC14A") | — | max 0.08 | max 1.5 | 18 - 21 | max 1.5 | max 0.04 | max 0.04 |
| [SCH11X](/materials/jis/sch11x "SCH11X") | — | 0.3 - 0.5 | 1 - 2.5 | 25 - 28 | max 1.5 | max 0.04 | max 0.03 |
| [SSC23](/materials/ks/ssc23 "SSC23") | — | max 0.07 | max 2 | 19 - 22 | max 2 | max 0.04 | max 0.04 |
| [SCH13A](/materials/jis/sch13a "SCH13A") | — | 0.25 - 0.5 | max 1.75 | 23 - 26 | max 2.5 | max 0.04 | max 0.04 |
| [CF10SMnN](/materials/ks/cf10smnn "CF10SMnN") | — | max 0.01 | 3.5 - 4.5 | 16 - 18 | 7 - 9 | max 0.06 | max 0.03 |
| [SCH16](/materials/jis/sch16 "SCH16") | — | 0.2 - 0.35 | max 2.5 | 13 - 17 | max 2 | max 0.04 | max 0.04 |
| [SCH20](/materials/jis/sch20 "SCH20") | — | 0.35 - 0.75 | max 2.5 | 17 - 21 | max 2 | max 0.04 | max 0.04 |
| [GX30CrSi7](/materials/din-en/gx30crsi7 "GX30CrSi7") | [1.4710](/materials/material-no/1.4710 "1.4710") | 0,20-0,35 | 1,00-2,50 | 6,00-8,00 | 0,50-1,00 | 0,035 | 0,03 |
| [GX40CrSi13](/materials/din-en/gx40crsi13 "GX40CrSi13") | [1.4729](/materials/material-no/1.4729 "1.4729") | 0,30-0,50 | 1,00-2,50 | 12,0-14,0 | ≤1,00 | 0,04 | 0,03 |
| [GX40CrSi17](/materials/din-en/gx40crsi17 "GX40CrSi17") | [1.4740](/materials/material-no/1.4740 "1.4740") | 0,30-0,50 | 1,00-2,50 | 16,0-19,0 | ≤1,00 | 0,04 | 0,03 |
| [GX160CrSi18](/materials/din-en/gx160crsi18 "GX160CrSi18") | [1.4743](/materials/material-no/1.4743 "1.4743") | 1,40-1,80 | 1,00-2,50 | 17,0-19,0 | ≤1,00 | 0,04 | 0,03 |
| [GX40CrSi24](/materials/din-en/gx40crsi24 "GX40CrSi24") | [1.4745](/materials/material-no/1.4745 "1.4745") | 0,30-0,50 | 1,00-2,50 | 23,0-26,0 | ≤1,00 | 0,04 | 0,03 |
| [GX40CrSi28](/materials/din-en/gx40crsi28 "GX40CrSi28") | [1.4776](/materials/material-no/1.4776 "1.4776") | 0,30-0,50 | 1,00-2,50 | 27,0-30,0 | ≤1,00 | 0,04 | 0,03 |
| [GX130CrSi29](/materials/din-en/gx130crsi29 "GX130CrSi29") | [1.4777](/materials/material-no/1.4777 "1.4777") | 1,20-1,40 | 1,00-2,50 | 27,0-30,0 | 0,50-1,00 | 0,035 | 0,03 |
| [GX40CrNi24-5](/materials/din-en/gx40crni24-5 "GX40CrNi24-5") | [1.4822](/materials/material-no/1.4822 "1.4822") | 0,30-0,50 | 1,00-2,00 | 23,0-25,0 | ≤1,50 | 0,045 | 0,03 |
| [GX40CrNiSi27-4](/materials/din-en/gx40crnisi27-4 "GX40CrNiSi27-4") | [1.4823](/materials/material-no/1.4823 "1.4823") | 0,30-0,50 | 1,00-2,50 | 25,0-28,0 | ≤1,50 | 0,04 | 0,03 |
| [GX25CrNiSi18-9](/materials/din-en/gx25crnisi18-9 "GX25CrNiSi18-9") | [1.4825](/materials/material-no/1.4825 "1.4825") | 0,15-0,35 | 0,50-2,50 | 17,0-19,0 | ≤2,00 | 0,04 | 0,03 |
| [GX40CrNiSi22-10](/materials/din-en/gx40crnisi22-10 "GX40CrNiSi22-10") | [1.4826](/materials/material-no/1.4826 "1.4826") | 0,30-0,50 | 1,00-2,50 | 21,0-23,0 | ≤2,00 | 0,04 | 0,03 |
| [GX8CrNiNb19-10](/materials/din-en/gx8crninb19-10 "GX8CrNiNb19-10") | [1.4827](/materials/material-no/1.4827 "1.4827") | ≤0,08 | ≤1,50 | 18,0-20,0 | ≤1,50 | 0,045 | 0,03 |
| [GX25CrNiSi20-14](/materials/din-en/gx25crnisi20-14 "GX25CrNiSi20-14") | [1.4832](/materials/material-no/1.4832 "1.4832") | 0,15-0,35 | 0,50-2,50 | 19,0-21,0 | ≤2,00 | 0,04 | 0,03 |
| [1.4837](/materials/material-no/1.4837 "1.4837") | [1.4837](/materials/material-no/1.4837 "1.4837") | 0,30-0,50 | 1,00-2,50 | 24,0-27,0 | ≤2,00 | 0,04 | 0,03 |
| [GX15CrNi25-20](/materials/din-en/gx15crni25-20 "GX15CrNi25-20") | [1.4840](/materials/material-no/1.4840 "1.4840") | 0,10-0,20 | 0,50-1,50 | 24,0-26,0 | 0,50-1,50 | 0,045 | 0,03 |
| [GX40CrNiSi25-20](/materials/din-en/gx40crnisi25-20 "GX40CrNiSi25-20") | [1.4848](/materials/material-no/1.4848 "1.4848") | 0,30-0,50 | 1,00-2,50 | 24,0-27,0 | ≤2,00 | 0,04 | 0,03 |
| [GX40NiCrSiNb38-19](/materials/din-en/gx40nicrsinb38-19 "GX40NiCrSiNb38-19") | [1.4849](/materials/material-no/1.4849 "1.4849") | 0,30-0,50 | 1,00-2,50 | 18,0-21,0 | ≤2,00 | 0,04 | 0,03 |
| [GX40NiCrSiNb35-26](/materials/din-en/gx40nicrsinb35-26 "GX40NiCrSiNb35-26") | [1.4852](/materials/material-no/1.4852 "1.4852") | 0,30-0,50 | 1,00-2,50 | 24,0-27,0 | ≤2,00 | 0,04 | 0,03 |
| [GX40CrNiSiNb24-24](/materials/din-en/gx40crnisinb24-24 "GX40CrNiSiNb24-24") | [1.4855](/materials/material-no/1.4855 "1.4855") | 0,30-0,50 | 1,00-2,50 | 23,0-25,0 | ≤2,00 | 0,04 | 0,03 |
| [GX40NiCrSi35-26](/materials/din-en/gx40nicrsi35-26 "GX40NiCrSi35-26") | [1.4857](/materials/material-no/1.4857 "1.4857") | 0,30-0,50 | 1,00-2,50 | 24,0-27,0 | ≤2,00 | 0,04 | 0,03 |
| [GX10NiCrSiNb32-20](/materials/din-en/gx10nicrsinb32-20 "GX10NiCrSiNb32-20") | [1.4859](/materials/material-no/1.4859 "1.4859") | 0,05-0,15 | 0,50-1,50 | 19,0-21,0 | ≤2,00 | 0,04 | 0,03 |
| [1.4865](/materials/material-no/1.4865 "1.4865") | [1.4865](/materials/material-no/1.4865 "1.4865") | 0,30-0,50 | 1,00-2,50 | 18,0-21,0 | ≤2,00 | 0,04 | 0,03 |
| [G-CoCr28](/materials/din-en/g-cocr28 "G-CoCr28") | [2.4778](/materials/material-no/2.4778 "2.4778") | 0,05-0,25 | 0,50-1,50 | 27,0-30,0 | ≤1,50 | 0,04 | 0,03 |
| [G-CoCr28Nb](/materials/din-en/g-cocr28nb "G-CoCr28Nb") | [2.4779](/materials/material-no/2.4779 "2.4779") | 0,25-0,35 | 0,50-1,50 | 27,0-30,0 | 0,50-1,50 | — | — |
| [G-NiCr28W](/materials/din-en/g-nicr28w "G-NiCr28W") | [2.4879](/materials/material-no/2.4879 "2.4879") | 0,35-0,55 | 1,00-2,00 | 27,0-30,0 | ≤1,50 | 0,04 | 0,03 |

 [Previous](/categories/heat-resistant-cast-steels "Previous") Page 2 of 2

## Standards covering this category

 15

- [**JIS***53 grades*](/materials/jis "JIS — 53 grades in this category")
- [**DIN / EN***25 grades*](/materials/din-en "DIN / EN — 25 grades in this category")
- [**KS***15 grades*](/materials/ks "KS — 15 grades in this category")
- [**UNS***13 grades*](/materials/uns "UNS — 13 grades in this category")
- [**AISI / SAE***10 grades*](/materials/aisi-sae "AISI / SAE — 10 grades in this category")
- [**BS***5 grades*](/materials/bs "BS — 5 grades in this category")
- [**GOST***4 grades*](/materials/gost "GOST — 4 grades in this category")
- [**ČSN***4 grades*](/materials/csn "ČSN — 4 grades in this category")
- [**UNI***3 grades*](/materials/uni "UNI — 3 grades in this category")
- [**AFNOR***2 grades*](/materials/afnor "AFNOR — 2 grades in this category")
- [**GB***2 grades*](/materials/gb "GB — 2 grades in this category")
- [**PN***2 grades*](/materials/pn "PN — 2 grades in this category")
- [**UNE***1 grade*](/materials/une "UNE — 1 grade in this category")
- [**MSZ***1 grade*](/materials/msz "MSZ — 1 grade in this category")
- [**STAS***1 grade*](/materials/stas "STAS — 1 grade in this category")

## Property ranges

 12

| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| Rm | N/mm² | 150 | 590 | 53 |
| Re | N/mm² | 170 | 320 | 46 |
| A | % | 3 | 35 | 46 |
| A5 | % | 20 | 25 | 3 |
| Z | % | 25 | 28 | 3 |
| HB | — | 130 | 400 | 11 |
| rho | g/cm³ | 7 | 7.85 | 27 |
| E | GPa | 90 | 196 | 3 |
| alpha | 10^-6/K | 9 | 18.4 | 3 |
| lambda | W/(m·K) | 54 | 59 | 2 |
| cp | J/(kg·K) | 460 | 480 | 2 |
| rho\_el | nΩ·m | 860 | 860 | 1 |

Derived from 53 grades in this category with a recorded value.

## Composition range

 14

| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| C | % | 0.01 | 1.8 | 80 |
| N | % | 0.08 | 0.18 | 2 |
| Si | % | 0.5 | 4.5 | 80 |
| P | % | 0.02 | 0.06 | 79 |
| S | % | 0.02 | 0.04 | 79 |
| Cr | % | 6 | 52 | 80 |
| Mn | % | 0.5 | 9 | 80 |
| Fe | % | 9.38 | 22.25 | 4 |
| Co | % | 14 | 52 | 5 |
| Ni | % | 0.5 | 69 | 78 |
| Cu | % | 0.5 | 4 | 2 |
| Nb | % | 0.5 | 2.5 | 11 |
| Mo | % | 0.15 | 3 | 69 |
| W | % | 2 | 6 | 4 |

Derived from 80 grades in this category with a recorded value.

## Related guides

 5

- [**Heat Treatment Fundamentals for Steel**](/wiki/heat-treatment/heat-treatment-fundamentals "Heat Treatment Fundamentals for Steel")
- [**Steel Heat Treatment Process Selection: A Standards-Based Guide**](/wiki/heat-treatment/steel-heat-treatment-process-selection "Steel Heat Treatment Process Selection: A Standards-Based Guide")
- [**Steel Microstructures After Heat Treatment**](/wiki/steel-families/steel-microstructures-after-heat-treatment "Steel Microstructures After Heat Treatment")
- [**Steel Heat Treatment Atmospheres and Surface Protection**](/wiki/heat-treatment/steel-heat-treatment-atmospheres-and-surface-protection "Steel Heat Treatment Atmospheres and Surface Protection")
- [**Heat Treatment Distortion and Residual Stress in Steel**](/wiki/heat-treatment/heat-treatment-distortion-and-residual-stress-in-steel "Heat Treatment Distortion and Residual Stress in Steel")