Material 1.4938

High-temperature resisting steel and alloy

The Material 1.4938 / 1.4939 is a highly heat-resistant martensitic steel. This steel can be used up to a maximum temperature about 560 °C / 1040 °F. Typical application for 1.4938/1.4939 include highly stressed bolts in turbine.

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1.4938

Standards

HDIN / EN US-Standard AFNOR UNI JIS request
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Material Category: High-temperature resisting steel and alloy

Chemical Composition

C % Si % Mn % P %  S % Cr % Mo % N % Ni % V %
0,08 - 0,15 max 0,50 0,40 - 0,90 max 0,025 max 0,015 11,00 - 12,50 1,50 - 2,00 0,020 - 0,040 2,00 - 3,00 0,25 - 0,40

 

Mechanical Properties

vergütet
0,2% Dehngrenze
(Rp0,2)
Zugfestigkeit
(Rm)
Bruchdehnung
(A 5,65)
Kerbschlagarbeit
(DVM)
Zeitstandfestigkeit
10.000 h
Zeitstandfestigkeit
100.000 h
Warmfestigkeit bei Temperatur
            ~ 580 °C  
>= 800 N/mm² 950 - 1.150 N/mm² >= 13 % >= 55 Joule       ~ 20 °C
>= 800 N/mm²             ~ 200 °C
>= 770 N/mm²             ~ 300 °C
>= 700 N/mm²             ~ 400 °C
>= 590 N/mm²             ~ 500 °C
>= 470 N/mm²       ~ 145 N/mm² ~ 102 N/mm²   ~ 550 °C
>= 350 N/mm²       ~ 98 N/mm² ~ 49 N/mm²   ~ 600 °C

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