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![Case hardening steels](/images/uploads/1e70294e-5141-44e2-aed7-7854c487fc3e/hardening-steel-category-case-hardened-gears-1920x1080.jpg)

Category · 60 grades

# Case hardening steels

Case hardening steels are steels designed to develop a hard, wear-resistant surface while retaining a tough and ductile core. They are used for components such as gears, shafts and other machine parts exposed to contact wear and cyclic loading.

| Grade | Material no. | C | Si | P | S | Mn | Cr |
|---|---|---|---|---|---|---|---|
| [C10](/materials/din-en/c10 "C10") | [1.0301](/materials/material-no/1.0301 "1.0301") | 0,07-0,13 | ≤0,40 | 0,045 | 0,045 | 0,30-0,60 | — |
| [C10GPb](/materials/din-en/c10gpb "C10GPb") | [1.0302](/materials/material-no/1.0302 "1.0302") | 0,07-0,13 | ≤0,40 | 0,045 | 0,045 | 0,30-0,60 | — |
| [1.0401](/materials/material-no/1.0401 "1.0401") | [1.0401](/materials/material-no/1.0401 "1.0401") | 0,12-0,18 | ≤0,40 | 0,045 | 0,045 | 0,30-0,80 | — |
| [C15GPb](/materials/din-en/c15gpb "C15GPb") | [1.0403](/materials/material-no/1.0403 "1.0403") | 0,12-0,18 | ≤0,40 | 0,045 | 0,045 | 0,30-0,80 | — |
| [C10D2](/materials/din-en/c10d2 "C10D2") | [1.1114](/materials/material-no/1.1114 "1.1114") | 0,08-0,12 | ≤0,30 | 0,02 | 0,025 | 0,30-0,50 | ≤0,10 |
| [C10E](/materials/din-en/c10e "C10E") | [1.1121](/materials/material-no/1.1121 "1.1121") | 0,07-0,13 | ≤0,40 | 0,035 | 0,035 | 0,30-0,60 | (≤0,40) |
| [C15R](/materials/din-en/c15r "C15R") | [1.1140](/materials/material-no/1.1140 "1.1140") | 0,12-0,18 | ≤0,40 | 0,035 | 0,020-0,040 | 0,30-0,60 | — |
| [1.1141](/materials/material-no/1.1141 "1.1141") | [1.1141](/materials/material-no/1.1141 "1.1141") | 0,12-0,18 | ≤0,40 | 0,035 | 0,035 | 0,30-0,60 | — |
| [C16E](/materials/din-en/c16e "C16E") | [1.1148](/materials/material-no/1.1148 "1.1148") | 0,12-0,18 | ≤0,40 | 0,035 | 0,035 | 0,60-0,90 | — |
| [C10R](/materials/din-en/c10r "C10R") | [1.1207](/materials/material-no/1.1207 "1.1207") | 0,07-0,13 | ≤0,40 | 0,035 | 0,020-0,040 | 0,30-0,60 | — |
| [C16R](/materials/din-en/c16r "C16R") | [1.1208](/materials/material-no/1.1208 "1.1208") | 0,12-0,18 | ≤0,40 | 0,035 | 0,020-0,040 | 0,60-0,90 | — |
| [19 Mn Cr 5](/materials/din-en/19mncr5 "19 Mn Cr 5") | [1.3523](/materials/material-no/1.3523 "1.3523") | 0,17-0,22 | ≤0,40 | 0,025 | 0,015 | 1,10-1,40 | 1,10-1,30 |
| [20MnV6](/materials/din-en/20mnv6 "20MnV6") | [1.5217](/materials/material-no/1.5217 "1.5217") | 0,16-0,22 | 0,10-0,50 | 0,035 | 0,035 | 1,30-1,70 | — |
| [16NiCr4](/materials/din-en/16nicr4 "16NiCr4") | [1.5714](/materials/material-no/1.5714 "1.5714") | 0,13-0,19 | ≤0,40 | 0,025 | 0,035 | 0,70-1,00 | 0,60-1,00 |
| [16NiCrS4](/materials/din-en/16nicrs4 "16NiCrS4") | [1.5715](/materials/material-no/1.5715 "1.5715") | 0,13-0,19 | ≤0,40 | 0,025 | 0,020-0,040 | 0,70-1,00 | 0,60-1,00 |
| [1.5732](/materials/material-no/1.5732 "1.5732") | [1.5732](/materials/material-no/1.5732 "1.5732") | 0,10-0,17 | 0,15-0,35 | 0,035 | 0,035 | 0,40-0,70 | 0,55-0,95 |
| [1.5752](/materials/material-no/1.5752 "1.5752") | [1.5752](/materials/material-no/1.5752 "1.5752") | 0,14-0,20 | ≤0,40 | 0,025 | 0,035 | 0,40-0,70 | 0,60-0,90 |
| [1.5752](/materials/material-no/1.5752 "1.5752") | [1.5752](/materials/material-no/1.5752 "1.5752") | 0,14-0,20 | ≤0,40 | 0,025 | 0,035 | 0,40-0,70 | 0,60-0,90 |
| [10NiCr5-4](/materials/din-en/10nicr5-4 "10NiCr5-4") | [1.5805](/materials/material-no/1.5805 "1.5805") | 0,07-0,12 | ≤0,40 | 0,025 | 0,035 | 0,60-0,90 | 0,90-1,20 |
| [18NiCr5-4](/materials/din-en/18nicr5-4 "18NiCr5-4") | [1.5810](/materials/material-no/1.5810 "1.5810") | 0,16-0,21 | ≤0,40 | 0,025 | 0,035 | 0,60-0,90 | 0,90-1,20 |
| [14NiCr18](/materials/din-en/14nicr18 "14NiCr18") | [1.5860](/materials/material-no/1.5860 "1.5860") | 0,10-0,17 | 0,15-0,35 | 0,035 | 0,035 | 0,40-0,70 | 0,90-1,30 |
| [15CrNi6](/materials/din-en/15crni6 "15CrNi6") | [1.5918](/materials/material-no/1.5918 "1.5918") | 0,14-0,20 | ≤0,40 | 0,025 | 0,035 | 0,50-0,90 | 1,40-1,70 |
| [15CrNi6](/materials/din-en/15crni6 "15CrNi6") | [1.5919](/materials/material-no/1.5919 "1.5919") | 0,12-0,18 | ≤0,25 | 0,02 | 0,015 | 0,40-0,70 | 1,35-1,65 |
| [18CrNi8](/materials/din-en/18crni8 "18CrNi8") | [1.5920](/materials/material-no/1.5920 "1.5920") | 0,15-0,20 | 0,15-0,40 | 0,035 | 0,035 | 0,40-0,60 | 1,80-2,10 |
| [20MnNiCrMo3-2](/materials/din-en/20mnnicrmo3-2 "20MnNiCrMo3-2") | [1.6522](/materials/material-no/1.6522 "1.6522") | 0,17-0,23 | ≤0,25 | 0,02 | 0,015 | 0,70-1,00 | 0,40-0,60 |
| [1.6523](/materials/material-no/1.6523 "1.6523") | [1.6523](/materials/material-no/1.6523 "1.6523") | 0,17-0,23 | ≤0,40 | 0,025 | 0,035 | 0,65-0,95 | 0,35-0,70 |
| [20NiCrMoS2-2](/materials/din-en/20nicrmos2-2 "20NiCrMoS2-2") | [1.6526](/materials/material-no/1.6526 "1.6526") | 0,17-0,23 | ≤0,40 | 0,025 | 0,020-0,040 | 0,65-0,95 | 0,35-0,70 |
| [20NiCrMo3](/materials/din-en/20nicrmo3 "20NiCrMo3") | [1.6527](/materials/material-no/1.6527 "1.6527") | 0,17-0,23 | ≤0,25 | 0,02 | 0,015 | 0,70-1,00 | 0,40-0,60 |
| [21 NiCrMo 2 2](/materials/din-en/21-nicrmo-2-2 "21 NiCrMo 2 2") | [1.6543](/materials/material-no/1.6543 "1.6543") | 0,18-0,23 | 0,20-0,35 | 0,035 | 0,035 | 0,70-0,90 | 0,40-0,60 |
| [17NiCrMo6-4](/materials/din-en/17nicrmo6-4 "17NiCrMo6-4") | [1.6566](/materials/material-no/1.6566 "1.6566") | 0,14-0,20 | ≤0,40 | 0,025 | 0,035 | 0,60-0,90 | 0,80-1,10 |
| [17NiCrMoS6-4](/materials/din-en/17nicrmos6-4 "17NiCrMoS6-4") | [1.6569](/materials/material-no/1.6569 "1.6569") | 0,14-0,20 | ≤0,40 | 0,025 | 0,020-0,040 | 0,60-0,90 | 0,80-1,10 |
| [20NiCrMoS6-4](/materials/din-en/20nicrmos6-4 "20NiCrMoS6-4") | [1.6571](/materials/material-no/1.6571 "1.6571") | 0,16-0,23 | ≤0,40 | 0,025 | 0,020-0,040 | 0,50-0,90 | 0,60-0,90 |
| [1.6587](/materials/material-no/1.6587 "1.6587") | [1.6587](/materials/material-no/1.6587 "1.6587") | 0,15-0,21 | ≤0,40 | 0,025 | 0,035 | 0,50-0,90 | 1,50-1,80 |
| [20NiCrMo14-5](/materials/din-en/20nicrmo14-5 "20NiCrMo14-5") | [1.6772](/materials/material-no/1.6772 "1.6772") | 0,18-0,25 | 0,15-0,40 | 0,02 | 0,01 | 0,30-0,50 | 1,20-1,50 |
| [17CrS3](/materials/din-en/17crs3 "17CrS3") | [1.7014](/materials/material-no/1.7014 "1.7014") | 0,14-0,20 | ≤0,40 | 0,025 | 0,020-0,040 | 0,60-0,90 | 0,70-1,00 |
| [1.7015](/materials/material-no/1.7015 "1.7015") | [1.7015](/materials/material-no/1.7015 "1.7015") | 0,12-0,18 | 0,15-0,40 | 0,035 | 0,035 | 0,40-0,60 | 0,40-0,70 |
| [17Cr3](/materials/din-en/17cr3 "17Cr3") | [1.7016](/materials/material-no/1.7016 "1.7016") | 0,14-0,20 | ≤0,40 | 0,025 | 0,035 | 0,60-0,90 | 0,70-1,00 |
| [20Cr4](/materials/din-en/20cr4 "20Cr4") | [1.7027](/materials/material-no/1.7027 "1.7027") | 0,17-0,23 | ≤0,40 | 0,025 | 0,015 | 0,60-0,90 | 0,90-1,20 |
| [20CrS4](/materials/din-en/20crs4 "20CrS4") | [1.7028](/materials/material-no/1.7028 "1.7028") | 0,17-0,23 | ≤0,40 | 0,035 | 0,020-0,035 | 0,60-0,90 | 0,90-1,20 |
| [28CrS4](/materials/din-en/28crs4 "28CrS4") | [1.7036](/materials/material-no/1.7036 "1.7036") | 0,24-0,31 | ≤0,40 | 0,025 | 0,020-0,040 | 0,60-0,90 | 0,90-1,20 |
| [1.7131](/materials/material-no/1.7131 "1.7131") | [1.7131](/materials/material-no/1.7131 "1.7131") | 0,14-0,19 | ≤0,40 | 0,025 | 0,035 | 1,00-1,30 | 0,80-1,10 |
| [16MnCrS5](/materials/din-en/16mncrs5 "16MnCrS5") | [1.7139](/materials/material-no/1.7139 "1.7139") | 0,14-0,19 | ≤0,40 | 0,025 | 0,020-0,040 | 1,00-1,30 | 0,80-1,10 |
| [20MnCr5](/materials/din-en/20mncr5 "20MnCr5") | [1.7147](/materials/material-no/1.7147 "1.7147") | 0,17-0,22 | ≤0,40 | 0,025 | 0,035 | 1,10-1,40 | 1,00-1,30 |
| [20MnCrS5](/materials/din-en/20mncrs5 "20MnCrS5") | [1.7149](/materials/material-no/1.7149 "1.7149") | 0,17-0,22 | ≤0,40 | 0,025 | 0,020-0,040 | 1,10-1,40 | 1,00-1,30 |
| [16MnCrB5](/materials/din-en/16mncrb5 "16MnCrB5") | [1.7160](/materials/material-no/1.7160 "1.7160") | 0,14-0,19 | ≤0,40 | 0,025 | 0,035 | 1,00-1,30 | 0,80-1,10 |
| [18CrMo4](/materials/din-en/18crmo4 "18CrMo4") | [1.7243](/materials/material-no/1.7243 "1.7243") | 0,15-0,21 | ≤0,40 | 0,025 | 0,035 | 0,60-0,90 | 0,90-1,20 |
| [18CrMoS4](/materials/din-en/18crmos4 "18CrMoS4") | [1.7244](/materials/material-no/1.7244 "1.7244") | 0,15-0,21 | ≤0,40 | 0,025 | 0,020-0,040 | 0,60-0,90 | 0,90-1,20 |
| [1.7262](/materials/material-no/1.7262 "1.7262") | [1.7262](/materials/material-no/1.7262 "1.7262") | 0,13-0,17 | 0,15-0,35 | 0,035 | 0,035 | 0,80-1,10 | 1,00-1,30 |
| [20CrMo5](/materials/din-en/20crmo5 "20CrMo5") | [1.7264](/materials/material-no/1.7264 "1.7264") | 0,18-0,23 | 0,15-0,35 | 0,035 | 0,035 | 0,90-1,20 | 1,10-1,40 |
| [23CrMoB3-3](/materials/din-en/23crmob3-3 "23CrMoB3-3") | [1.7271](/materials/material-no/1.7271 "1.7271") | 0,20-0,25 | 0,15-0,35 | 0,035 | 0,035 | 0,70-0,90 | 0,70-0,90 |

 Page 1 of 2[Next](/categories/case-hardening-steels/page/2 "Next")

## Standards covering this category

 28

- [**DIN / EN***60 grades*](/materials/din-en "DIN / EN — 60 grades in this category")
- [**AISI / SAE***37 grades*](/materials/aisi-sae "AISI / SAE — 37 grades in this category")
- [**UNS***33 grades*](/materials/uns "UNS — 33 grades in this category")
- [**AFNOR***29 grades*](/materials/afnor "AFNOR — 29 grades in this category")
- [**PN***28 grades*](/materials/pn "PN — 28 grades in this category")
- [**GOST***26 grades*](/materials/gost "GOST — 26 grades in this category")
- [**ČSN***24 grades*](/materials/csn "ČSN — 24 grades in this category")
- [**SRPS***22 grades*](/materials/srps "SRPS — 22 grades in this category")
- [**UNI***21 grades*](/materials/uni "UNI — 21 grades in this category")
- [**UNE***20 grades*](/materials/une "UNE — 20 grades in this category")
- [**ISO***20 grades*](/materials/iso "ISO — 20 grades in this category")
- [**BS***19 grades*](/materials/bs "BS — 19 grades in this category")
- [**JIS***19 grades*](/materials/jis "JIS — 19 grades in this category")
- [**GB***16 grades*](/materials/gb "GB — 16 grades in this category")
- [**MSZ***14 grades*](/materials/msz "MSZ — 14 grades in this category")
- [**SS***12 grades*](/materials/ss "SS — 12 grades in this category")
- [**BDS***11 grades*](/materials/bds "BDS — 11 grades in this category")
- [**STN***10 grades*](/materials/stn "STN — 10 grades in this category")
- [**STAS***10 grades*](/materials/stas "STAS — 10 grades in this category")
- [**COPANT***8 grades*](/materials/copant "COPANT — 8 grades in this category")
- [**KS***6 grades*](/materials/ks "KS — 6 grades in this category")
- [**AS / NZS***5 grades*](/materials/as-nzs "AS / NZS — 5 grades in this category")
- [**ÖNORM***5 grades*](/materials/onorm "ÖNORM — 5 grades in this category")
- [**NBN***5 grades*](/materials/nbn "NBN — 5 grades in this category")
- [**SFS***5 grades*](/materials/sfs "SFS — 5 grades in this category")
- [**ASTM***3 grades*](/materials/astm "ASTM — 3 grades in this category")
- [**SNV***3 grades*](/materials/snv "SNV — 3 grades in this category")
- [**HRN***2 grades*](/materials/hrn "HRN — 2 grades in this category")

## Property ranges

 18

| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| Rm | N/mm² | 320 | 1570 | 20 |
| Re | N/mm² | 390 | 1320 | 9 |
| A | % | 7 | 20 | 6 |
| A5 | % | 7 | 19 | 9 |
| Z | % | 40 | 55 | 7 |
| KCU | kJ/m² | 590 | 1130 | 8 |
| HB | — | 85 | 269 | 38 |
| HRB | — | 73 | 84 | 4 |
| HV | — | 135 | 260 | 4 |
| rho | g/cm³ | 7.63 | 7.85 | 60 |
| E | GPa | 129 | 216 | 4 |
| alpha | 10^-6/K | 10 | 15.6 | 4 |
| lambda | W/(m·K) | 19 | 42 | 4 |
| cp | J/(kg·K) | 495 | 706 | 3 |
| Ac1 | °C | 715 | 750 | 6 |
| Ac3 | °C | 773 | 850 | 6 |
| Ar3 | °C | 675 | 755 | 4 |
| Ar1 | °C | 625 | 665 | 4 |

Derived from 60 grades in this category with a recorded value.

## Composition range

 15

| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| B | % | 0.0008 | 0.005 | 2 |
| C | % | 0.07 | 0.31 | 60 |
| N | % | 0.007 | 0.012 | 4 |
| O | % | 0.002 | 0.002 | 2 |
| Al | % | 0.01 | 0.05 | 11 |
| Si | % | 0.1 | 0.5 | 59 |
| P | % | 0.02 | 0.045 | 60 |
| S | % | 0.01 | 0.05 | 60 |
| V | % | 0.1 | 0.2 | 2 |
| Cr | % | 0.1 | 2.1 | 49 |
| Mn | % | 0.3 | 1.7 | 60 |
| Ni | % | 0.1 | 4.75 | 22 |
| Cu | % | 0.15 | 0.3 | 6 |
| Mo | % | 0.05 | 0.5 | 24 |
| Pb | % | 0.15 | 0.35 | 2 |

Derived from 60 grades in this category with a recorded value.

## Heat treatment

 9

| Operation | Min Temperature (°C) | Max Temperature (°C) | Grades |
|---|---|---|---|
| quenching | 780 | 1050 | 8 |
| tempering | 200 | 750 | 8 |
| soft\_annealing | — | — | 6 |
| annealing | 950 | 950 | 6 |
| carburizing | — | — | 6 |
| quench\_and\_temper | — | — | 3 |
| spheroidize\_annealing | — | — | 3 |
| normalizing | 900 | 960 | 3 |
| solution\_annealing | — | — | 1 |

## Related guides

 2

- [**Case Hardening Methods for Steel**](/wiki/heat-treatment/case-hardening-methods-for-steel "Case Hardening Methods for Steel")
- [**Steel Tempering Response and Secondary Hardening**](/wiki/heat-treatment/steel-tempering-response-and-secondary-hardening "Steel Tempering Response and Secondary Hardening")