Material 1.5026

Spring steel

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1.5026

Standards

HDIN / EN US-Standard AFNOR UNI JIS request
56Si7 55Si7 AISI 9255 UNS G92550 55Si7 request

Material Category: Spring steel

Applications

Coil springs, spring plates, disk springs

Heat Treatment

Hardening 850 - 870 C°, cooling oil
Temper 440 - 460 C°
Forehead quenching test 845 - 855 C°

Chemical Composition

C % Si % Mn % P % S % Cr % Mo % Ni %  
0,52 - 0,60 1,60 - 2,00 0,60 - 0,90 max 0,025 max 0,025 max 0,40 max 0,10 max 0,40 Cu+10Sn <= 0,60

 

Product Specifications

DIN EN 10089 (04/2003)
DIN EN 10132-4 (04/2003)

Mechanical Properties

~DIN EN 10089
Warmgewalzte Stähle für vergütbare Federn		 Härte 
weichgeglüht  <= 248 HB 
abgeschreckt
Stirnabschreckversuch nach Jominy
~ 2,2 mm ~ 56 HRC
~ 3,5 mm ~ 56 HRC
~ 4 mm ~ 52 HRC
~ 5,3 mm ~ 52 HRC
Stirnabschreckversuch nach Jominy (+H)
~ 1,5 mm 57 - 65 HRC
~ 3 mm 55 - 62 HRC
~ 5 mm 49 - 60 HRC
~ 7 mm 43 - 57 HRC
~ 9 mm 37 - 54 HRC
~ 11 mm 34 - 50 HRC
~ 13 mm 32 - 46 HRC
~ 15 mm 31 - 42 HRC
~ 20 mm 28 - 39 HRC
~ 25 mm 27 - 37 HRC
~ 30 mm 26 - 36 HRC
~ 35 mm 26 - 35 HRC
~ 40 mm 25 - 34 HRC
~ 45 mm 25 - 34 HRC
~ 50 mm 24 - 33 HRC
Stirnabschreckversuch nach Jominy (+HH)
~ 1,5 mm 60 - 65 HRC
~ 3 mm 57 - 62 HRC
~ 5 mm 53 - 60 HRC
~ 7 mm 48 - 57 HRC
~ 9 mm 43 - 54 HRC
~ 11 mm 39 - 50 HRC
~ 13 mm 37 - 46 HRC
~ 15 mm 35 - 42 HRC
~ 20 mm 32 - 39 HRC
~ 25 mm 30 - 37 HRC
~ 30 mm 29 - 36 HRC
~ 35 mm 29 - 35 HRC
~ 40 mm 28 - 34 HRC
~ 45 mm 28 - 34 HRC
~ 50 mm 27 - 33 HRC
vergütet
0,2% Dehngrenze (Rp0,2) Zugfestigkeit (Rm) Bruchdehnung (A5, 65) Einschnürung (Z) Kerbschlagarbeit KU (ISO-U/Charpy-U)
>= 1.300 N/mm² 1.450 - 1.750 N/mm² >= 6 % >= 25 % >= 13 Joule
behandelt auf Kaltscherbarkeit Härte [HB] <= 280 HB
geglüht zur Erzielung kugeliger Carbide Härte [HB] <= 230 HB

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