Material 1.7243

Case hardening steel

The material 1.7243 is a chromium-molybdenum alloyed case-hardening steel. This material is used for components subject to wear.

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1.7243

Standards

HDIN / EN US-Standard AFNOR UNI JIS request
18CrMo4 request

Material Category: Case hardening steel

Applications

waves
gears
pinion

Heat Treatment

Normalizing at 840 - 870 C°, cooling in the air
Soft annealing at 650 - 700 C°, cooling in the furnace
Carburizing at 870 - 930 C°
Core hardening at 840 - 870C°, quenching in oil
Intermediate annealing at 650 - 700 C°
Case hardening at 810 - 830 C°, quenching in oil or water
Temper at 170 - 210 C°

Weldability

18CrMo4 is usually weldable

Chemical Composition

C % Si % Mn % P % S % Cr % Mo %
0,15 - 0,21 max 0,40 0,60 - 0,90 max 0,025 max 0,035 0,90 - 1,20 0,15 - 0,25

 

Product Specifications

DIN EN 10084 (06/2008)
DIN EN 10250-3 (12/1999)
DIN EN 10263-3 (02/2018)
DIN EN ISO 683-3 (04/2019)

Mechanical Properties

DIN EN 10084 (06/2008)
Einsatzstähle.
behandelt auf Härtespanne Härte [HBW] 156 - 207 HBW
behandelt auf Ferrit-Perlit Gefüge und Härtespanne Härte [HBW] 140 - 187 HBW
weichgeglüht Härte [HBW] <= 207 HBW
abgeschreckt Stirnabschreckversuch nach Jominy (+H) Stirnabschreckversuch nach Jominy (+HH) Stirnabschreckversuch nach Jominy (+HL)
~ 1,5 mm 39 - 47 HRC 42 - 47 HRC 39 - 44 HRC
~ 3 mm 37 - 46 HRC 40 - 46 HRC 37 - 43 HRC
~ 5 mm 34 - 45 HRC 38 - 45 HRC 34 - 41 HRC
~ 7 mm 30 - 42 HRC 34 - 42 HRC 30 - 38 HRC
~ 9 mm 27 - 39 HRC 31 - 39 HRC 27 - 35 HRC
~ 11 mm 24 - 37 HRC 28 - 37 HRC 24 - 33 HRC
~ 13 mm 22 - 35 HRC 26 - 35 HRC 22 - 31 HRC
~ 15 mm 21 - 34 HRC 25 - 34 HRC 21 - 30 HRC
~ 20 mm <= 31 HRC 22 - 31 HRC <= 27 HRC
~ 25 mm <= 29 HRC 20 - 29 HRC <= 25 HRC
~ 30 mm <= 28 HRC <= 28 HRC <= 24 HRC
~ 35 mm <= 27 HRC <= 27 HRC <= 23 HRC
~ 40 mm <= 26 HRC <= 26 HRC <= 22 HRC
vergütet bei ~ 200 ° C Zugfestigkeit (Rm)
<= 16 mm >= 1.100 N/mm²
16 - 40 mm >= 900 N/mm²
40 - 100 mm >= 700 N/mm²

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