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Material Data Sheet

material no.: 2.4668
UNS no.: N07718
designation: Alloy 718

CHEMICAL REQUIREMENTS iN (%)

ASTM B637 DIN EN 10302 API 6A718
C max. 0,08 0,020 - 0,08 max. 0,045
Mn, max. 0,35 0,35 0,35
Si, max. 0,35 0,35 0,35
P, max. 0,015 0,015 0,010
S, max. 0,015 0,015 0,010
Cr 17,0 - 21,0 17,0 - 21,0 17,0 - 21,0
Co, max. 1,0 1,00 1,00
Mo 2,80 - 3,30 2,80 - 3,3 2,80 - 3,30
Nb + Ta 4,75 - 5,50 4,7 - 5,5 4,87 - 5,20
Ti 0,65 - 1,15 0,60 - 1,20 0,80 - 1,15
Al 0,20 - 0,80 0,30 - 0,70 0,40 - 0,60
B max. 0,006 0,002 - 0,006 max. 0,006
Fe Bal. Bal. Bal.
Cu, max. 0,30 0,30 0,23
Ni 50,0 - 55,0 50,0 - 55,0 50,0 - 55,0
Pb, max. 0,0010
Se, max. 0,0005
Bi, max. 0,00005
Ca, max. *0,0030
Mg, max. *0,0060
*to be determined if intentionally added

MECHANICAL PROPERTIES

solution annealed
+ precipitation hardened
bar / forging bar / forging

D ≤ 160 mm
bar / forging

D < 76 mm / 76 mm ≤ D ≤ 254 mm / D > 254 mm
Rm (MPa) ≥ 1275 ≥ 1230 ≥ 1034
Rp 0,2 (MPa) ≥ 1034 ≥ 1030 827 - 1000
A (%) ≥ 12 ≥ 12 ≥ 20
Z (%) ≥ 15 ≥ 35 / ≥ 35 / ≥ 25
Av (J) at -60 °C l ≥ 68 (61)* / q ≥ 47 (41)* / q ≥ 41 (37)*
lateral expansion (mm) ≥ 0,38
hardness (HB) ≥ 331 32 - 40 HRC
*individual value

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