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Category · 62 grades

# Heat-resistant structural steels

Heat-resistant structural steels are structural steels designed to retain useful strength and dimensional stability at elevated temperatures. They are used for load-bearing components in hot-service equipment where mechanical performance must be maintained during heating.

| Grade | Material no. | C | Si | P | S | Mn | Mo |
|---|---|---|---|---|---|---|---|
| [1.0345](/materials/material-no/1.0345 "1.0345") | [1.0345](/materials/material-no/1.0345 "1.0345") | ≤0,16 | ≤0,35 | 0,025 | 0,01 | 0,60-1,20 | ≤0,08 |
| [HII](/materials/din-en/hii "HII") | [1.0423](/materials/material-no/1.0423 "1.0423") | ≤0,19 | ≤0,25 | 0,025 | 0,015 | ≥0,40 | — |
| [1.0425](/materials/material-no/1.0425 "1.0425") | [1.0425](/materials/material-no/1.0425 "1.0425") | ≤0,20 | ≤0,40 | 0,025 | 0,01 | 0,80-1,40 | ≤0,08 |
| [C22.8](/materials/din-en/c22-8 "C22.8") | [1.0460](/materials/material-no/1.0460 "1.0460") | 0,18-0,23 | ≤0,40 | 0,025 | 0,015 | 0,30-0,90 | ≤0,08 |
| [19Mn6](/materials/din-en/19mn6 "19Mn6") | [1.0473](/materials/material-no/1.0473 "1.0473") | 0,10-0,22 | ≤0,60 | 0,025 | 0,01 | 1,00-1,70 | ≤0,08 |
| [P285NH](/materials/din-en/p285nh "P285NH") | [1.0477](/materials/material-no/1.0477 "1.0477") | ≤0,18 | ≤0,40 | 0,025 | 0,015 | 0,60-1,40 | ≤0,08 |
| [1.0436](/materials/material-no/1.0436 "1.0436") | [1.0481](/materials/material-no/1.0481 "1.0481") | 0,08-0,20 | ≤0,40 | 0,025 | 0,01 | 0,90-1,50 | ≤0,08 |
| [19Mn5](/materials/din-en/19mn5 "19Mn5") | [1.0482](/materials/material-no/1.0482 "1.0482") | 0,17-0,22 | 0,30-0,60 | 0,04 | 0,04 | 1,00-1,30 | — |
| [21Mn6](/materials/din-en/21mn6 "21Mn6") | [1.0485](/materials/material-no/1.0485 "1.0485") | ≤0,23 | ≤0,60 | 0,045 | 0,045 | 1,15-1,60 | — |
| [15MnMoV4-5](/materials/din-en/15mnmov4-5 "15MnMoV4-5") | [1.5402](/materials/material-no/1.5402 "1.5402") | ≤0,18 | ≤0,40 | 0,025 | 0,015 | 0,90-1,40 | 0,40-0,60 |
| [17MnMoV6-4](/materials/din-en/17mnmov6-4 "17MnMoV6-4") | [1.5403](/materials/material-no/1.5403 "1.5403") | ≤0,19 | 0,20-0,50 | 0,035 | 0,035 | 1,40-1,70 | 0,20-0,50 |
| [21MoV5-3](/materials/din-en/21mov5-3 "21MoV5-3") | [1.5404](/materials/material-no/1.5404 "1.5404") | 0,17-0,25 | 0,15-0,35 | 0,035 | 0,035 | 0,50-0,80 | 0,45-0,55 |
| [17MnMoCrV3-6](/materials/din-en/17mnmocrv3-6 "17MnMoCrV3-6") | [1.5405](/materials/material-no/1.5405 "1.5405") | 0,15-0,20 | 0,15-0,35 | 0,025 | 0,025 | 0,60-0,80 | 0,50-0,60 |
| [GS-20 MoV 8 4](/materials/din-en/gs-20-mov-8-4 "GS-20 MoV 8 4") | [1.5406](/materials/material-no/1.5406 "1.5406") | 0,16-0,23 | 0,30-0,50 | 0,04 | 0,04 | 0,50-0,80 | 0,80-0,90 |
| [17MoV8-4](/materials/din-en/17mov8-4 "17MoV8-4") | [1.5406](/materials/material-no/1.5406 "1.5406") | 0,14-0,22 | 0,15-0,35 | 0,035 | 0,035 | 0,50-0,80 | 0,80-1,00 |
| [10MnMoCrV4-7](/materials/din-en/10mnmocrv4-7 "10MnMoCrV4-7") | [1.5407](/materials/material-no/1.5407 "1.5407") | 0,06-0,15 | 0,40-0,70 | 0,02 | 0,02 | 0,70-1,10 | 0,50-1,00 |
| [30MoB1](/materials/din-en/30mob1 "30MoB1") | [1.5408](/materials/material-no/1.5408 "1.5408") | 0,28-0,32 | ≤0,30 | 0,025 | 0,025 | 0,80-1,00 | 0,08-0,12 |
| [G10MnMoV6-3](/materials/din-en/g10mnmov6-3 "G10MnMoV6-3") | [1.5410](/materials/material-no/1.5410 "1.5410") | ≤0,12 | ≤0,60 | 0,025 | 0,02 | 1,20-1,80 | 0,20-0,40 |
| [18MnMo4-5](/materials/din-en/18mnmo4-5 "18MnMo4-5") | [1.5414](/materials/material-no/1.5414 "1.5414") | ≤0,20 | ≤0,40 | 0,015 | 0,005 | 0,90-1,50 | 0,45-0,60 |
| [1.5415](/materials/material-no/1.5415 "1.5415") | [1.5415](/materials/material-no/1.5415 "1.5415") | 0,12-0,20 | ≤0,35 | 0,025 | 0,01 | 0,40-0,90 | 0,25-0,35 |
| [26Mo2](/materials/din-en/26mo2 "26Mo2") | [1.5417](/materials/material-no/1.5417 "1.5417") | 0,22-0,29 | ≤0,40 | 0,035 | 0,03 | ≤1,50 | 0,15-0,25 |
| [37Mo2](/materials/din-en/37mo2 "37Mo2") | [1.5418](/materials/material-no/1.5418 "1.5418") | 0,35-0,40 | ≤0,30 | 0,025 | 0,025 | 0,60-0,90 | 0,20-0,30 |
| [G20Mo5](/materials/din-en/g20mo5 "G20Mo5") | [1.5419](/materials/material-no/1.5419 "1.5419") | 0,15-0,23 | ≤0,60 | 0,025 | 0,02 | 0,50-1,00 | 0,40-0,60 |
| [27MnMo3-3](/materials/din-en/27mnmo3-3 "27MnMo3-3") | [1.5420](/materials/material-no/1.5420 "1.5420") | 0,24-0,30 | 0,20-0,35 | 0,035 | 0,035 | 0,60-1,00 | 0,20-0,30 |
| [20MnMo3-5](/materials/din-en/20mnmo3-5 "20MnMo3-5") | [1.5421](/materials/material-no/1.5421 "1.5421") | 0,15-0,25 | 0,15-0,25 | 0,025 | 0,025 | 0,70-1,00 | 0,40-0,60 |
| [G18Mo5](/materials/din-en/g18mo5 "G18Mo5") | [1.5422](/materials/material-no/1.5422 "1.5422") | 0,15-0,20 | ≤0,60 | 0,02 | 0,02 | 0,80-1,20 | 0,45-0,65 |
| [1.5423](/materials/material-no/1.5423 "1.5423") | [1.5423](/materials/material-no/1.5423 "1.5423") | 0,12-0,20 | 0,15-0,50 | 0,04 | 0,04 | 0,50-0,80 | 0,45-0,65 |
| [10MnMo4-5](/materials/din-en/10mnmo4-5 "10MnMo4-5") | [1.5424](/materials/material-no/1.5424 "1.5424") | 0,08-0,12 | 0,55-0,75 | 0,02 | 0,02 | 0,95-1,25 | 0,48-0,62 |
| [11MnMo4-5](/materials/din-en/11mnmo4-5 "11MnMo4-5") | [1.5425](/materials/material-no/1.5425 "1.5425") | 0,09-0,14 | 0,08-0,22 | 0,02 | 0,02 | 0,85-1,15 | 0,48-0,62 |
| [13MnMo6-5](/materials/din-en/13mnmo6-5 "13MnMo6-5") | [1.5426](/materials/material-no/1.5426 "1.5426") | 0,09-0,14 | 0,08-0,22 | 0,02 | 0,02 | 1,35-1,65 | 0,48-0,62 |
| [13MnMo8-5](/materials/din-en/13mnmo8-5 "13MnMo8-5") | [1.5427](/materials/material-no/1.5427 "1.5427") | 0,09-0,14 | 0,08-0,22 | 0,02 | 0,02 | 1,80-2,20 | 0,48-0,62 |
| [13MnMo12-5](/materials/din-en/13mnmo12-5 "13MnMo12-5") | [1.5428](/materials/material-no/1.5428 "1.5428") | 0,08-0,17 | 0,15-0,30 | 0,03 | 0,03 | 2,80-3,20 | 0,45-0,60 |
| [22Mo4](/materials/din-en/22mo4 "22Mo4") | [1.5429](/materials/material-no/1.5429 "1.5429") | 0,18-0,25 | 0,20-0,40 | 0,03 | 0,03 | 0,40-0,70 | 0,30-0,40 |
| [G8MnMo7-4](/materials/din-en/g8mnmo7-4 "G8MnMo7-4") | [1.5430](/materials/material-no/1.5430 "1.5430") | 0,06-0,10 | ≤0,60 | 0,02 | 0,015 | 1,50-1,80 | 0,30-0,40 |
| [G12MnMo7-4](/materials/din-en/g12mnmo7-4 "G12MnMo7-4") | [1.5431](/materials/material-no/1.5431 "1.5431") | 0,08-0,15 | ≤0,60 | 0,02 | 0,015 | 1,50-1,80 | 0,30-0,40 |
| [42MnMo7](/materials/din-en/42mnmo7 "42MnMo7") | [1.5432](/materials/material-no/1.5432 "1.5432") | 0,38-0,45 | 0,20-0,35 | 0,04 | 0,04 | 1,55-1,85 | 0,15-0,25 |
| [70 MoMn 10 4](/materials/din-en/70-momn-10-4 "70 MoMn 10 4") | [1.5437](/materials/material-no/1.5437 "1.5437") | 0,63-0,77 | 0,20-0,35 | 0,04 | 0,04 | 0,70-1,05 | 0,80-1,10 |
| [8MoB5-4](/materials/din-en/8mob5-4 "8MoB5-4") | [1.5450](/materials/material-no/1.5450 "1.5450") | 0,06-0,10 | 0,10-0,35 | 0,025 | 0,02 | 0,60-0,80 | 0,40-0,50 |
| [26MnMoB6-4](/materials/din-en/26mnmob6-4 "26MnMoB6-4") | [1.5465](/materials/material-no/1.5465 "1.5465") | 0,25-0,30 | 0,30-0,60 | 0,025 | 0,025 | 1,25-1,50 | 0,30-0,45 |
| [18MnMoNi5-5](/materials/din-en/18mnmoni5-5 "18MnMoNi5-5") | [1.6308](/materials/material-no/1.6308 "1.6308") | ≤0,20 | ≤0,40 | 0,025 | 0,015 | 1,15-1,55 | 0,45-0,55 |
| [20MnMoNi5-5](/materials/din-en/20mnmoni5-5 "20MnMoNi5-5") | [1.6310](/materials/material-no/1.6310 "1.6310") | 0,17-0,23 | 0,15-0,30 | 0,012 | 0,008 | 1,20-1,50 | 0,40-0,55 |
| [20MnMoNi4-5](/materials/din-en/20mnmoni4-5 "20MnMoNi4-5") | [1.6311](/materials/material-no/1.6311 "1.6311") | 0,15-0,23 | ≤0,40 | 0,02 | 0,01 | 1,00-1,50 | 0,45-0,60 |
| [15NiCuMoNb5-6-4](/materials/din-en/15nicumonb5-6-4 "15NiCuMoNb5-6-4") | [1.6368](/materials/material-no/1.6368 "1.6368") | ≤0,17 | 0,25-0,50 | 0,025 | 0,01 | 0,80-1,20 | 0,25-0,50 |
| [16CrMo4](/materials/din-en/16crmo4 "16CrMo4") | [1.7242](/materials/material-no/1.7242 "1.7242") | 0,13-0,20 | 0,15-0,35 | 0,035 | 0,035 | 0,50-0,80 | 0,20-0,30 |
| [24CrMo5](/materials/din-en/24crmo5 "24CrMo5") | [1.7258](/materials/material-no/1.7258 "1.7258") | 0,20-0,28 | ≤0,40 | 0,035 | 0,035 | 0,50-0,80 | 0,20-0,35 |
| [17CrMo3-5](/materials/din-en/17crmo3-5 "17CrMo3-5") | [1.7332](/materials/material-no/1.7332 "1.7332") | ≤0,21 | 0,15-0,30 | 0,035 | 0,035 | 0,55-0,80 | 0,45-0,60 |
| [1.7335](/materials/material-no/1.7335 "1.7335") | [1.7335](/materials/material-no/1.7335 "1.7335") | 0,08-0,18 | ≤0,35 | 0,025 | 0,01 | 0,40-1,00 | 0,40-0,60 |
| [13CrMoSi5-5](/materials/din-en/13crmosi5-5 "13CrMoSi5-5") | [1.7336](/materials/material-no/1.7336 "1.7336") | ≤0,17 | 0,50-0,80 | 0,015 | 0,005 | 0,40-0,65 | 0,45-0,65 |
| [16CrMo4-4](/materials/din-en/16crmo4-4 "16CrMo4-4") | [1.7337](/materials/material-no/1.7337 "1.7337") | 0,13-0,20 | 0,15-0,35 | 0,035 | 0,035 | 0,50-0,80 | 0,40-0,50 |
| [10CrMo5-5](/materials/din-en/10crmo5-5 "10CrMo5-5") | [1.7338](/materials/material-no/1.7338 "1.7338") | ≤0,15 | 0,50-1,00 | 0,025 | 0,02 | 0,30-0,60 | 0,45-0,65 |

 Page 1 of 2[Next](/categories/heat-resistant-structural-steels/page/2 "Next")

## Standards covering this category

 24

- [**DIN / EN***62 grades*](/materials/din-en "DIN / EN — 62 grades in this category")
- [**UNS***37 grades*](/materials/uns "UNS — 37 grades in this category")
- [**AFNOR***16 grades*](/materials/afnor "AFNOR — 16 grades in this category")
- [**PN***16 grades*](/materials/pn "PN — 16 grades in this category")
- [**ASTM***15 grades*](/materials/astm "ASTM — 15 grades in this category")
- [**BS***14 grades*](/materials/bs "BS — 14 grades in this category")
- [**GOST***13 grades*](/materials/gost "GOST — 13 grades in this category")
- [**AISI / SAE***12 grades*](/materials/aisi-sae "AISI / SAE — 12 grades in this category")
- [**UNE***11 grades*](/materials/une "UNE — 11 grades in this category")
- [**UNI***11 grades*](/materials/uni "UNI — 11 grades in this category")
- [**ČSN***11 grades*](/materials/csn "ČSN — 11 grades in this category")
- [**JIS***10 grades*](/materials/jis "JIS — 10 grades in this category")
- [**STN***9 grades*](/materials/stn "STN — 9 grades in this category")
- [**ISO***8 grades*](/materials/iso "ISO — 8 grades in this category")
- [**SS***8 grades*](/materials/ss "SS — 8 grades in this category")
- [**MSZ***8 grades*](/materials/msz "MSZ — 8 grades in this category")
- [**ÖNORM***7 grades*](/materials/onorm "ÖNORM — 7 grades in this category")
- [**GB***5 grades*](/materials/gb "GB — 5 grades in this category")
- [**SRPS***5 grades*](/materials/srps "SRPS — 5 grades in this category")
- [**STAS***4 grades*](/materials/stas "STAS — 4 grades in this category")
- [**BDS***4 grades*](/materials/bds "BDS — 4 grades in this category")
- [**NBN***3 grades*](/materials/nbn "NBN — 3 grades in this category")
- [**SFS***2 grades*](/materials/sfs "SFS — 2 grades in this category")
- [**KS***2 grades*](/materials/ks "KS — 2 grades in this category")

## Property ranges

 18

| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| ReH | N/mm² | 210 | 470 | 13 |
| Rm | N/mm² | 350 | 880 | 18 |
| Re | N/mm² | 205 | 735 | 8 |
| A | % | 17 | 32 | 6 |
| A5 | % | 14 | 25 | 8 |
| Z | % | 35 | 67 | 4 |
| KCU | kJ/m² | 294 | 2700 | 8 |
| HB | — | 123 | 321 | 4 |
| rho | g/cm³ | 7.49 | 7.87 | 62 |
| E | GPa | 151 | 217 | 4 |
| alpha | 10^-6/K | 11.2 | 14.9 | 4 |
| lambda | W/(m·K) | 28 | 51 | 4 |
| cp | J/(kg·K) | 462 | 703 | 3 |
| rho\_el | nΩ·m | 200 | 1219 | 3 |
| Ac1 | °C | 724 | 760 | 4 |
| Ac3 | °C | 840 | 890 | 4 |
| Ar3 | °C | 760 | 825 | 3 |
| Ar1 | °C | 680 | 730 | 3 |

Derived from 62 grades in this category with a recorded value.

## Composition range

 19

| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| B | % | 0.0008 | 0.006 | 3 |
| C | % | 0.06 | 0.77 | 62 |
| N | % | 0.009 | 0.02 | 19 |
| Al | % | 0.01 | 0.06 | 20 |
| Si | % | 0.08 | 1 | 62 |
| P | % | 0.012 | 0.045 | 62 |
| S | % | 0.005 | 0.045 | 62 |
| Ti | % | 0.03 | 0.06 | 7 |
| V | % | 0.02 | 0.45 | 30 |
| Cr | % | 0.12 | 2.5 | 50 |
| Mn | % | 0.3 | 3.2 | 62 |
| Co | % | 0.03 | 0.03 | 1 |
| Ni | % | 0.12 | 1.3 | 37 |
| Cu | % | 0.12 | 0.8 | 32 |
| As | % | 0.025 | 0.025 | 1 |
| Nb | % | 0.01 | 0.05 | 13 |
| Mo | % | 0.08 | 1.2 | 58 |
| Sn | % | 0.011 | 0.025 | 2 |
| Ta | % | 0.03 | 0.03 | 1 |

Derived from 62 grades in this category with a recorded value.

## Heat treatment

 6

| Operation | Min Temperature (°C) | Max Temperature (°C) | Grades |
|---|---|---|---|
| normalizing | 900 | 960 | 3 |
| tempering | 650 | 730 | 3 |
| quenching | — | — | 2 |
| isothermal\_annealing | — | — | 2 |
| annealing | 650 | 705 | 1 |
| quench\_and\_temper | — | — | 1 |

## 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")