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4140 4330 Mod4340 / E-43404620 Vac. / AMS 62946150 Vac. / AMS 6448AISI 9310300mMARAGING 350MARAGING 300MARAGING 250

Alloy 418 / UNS S41800

Standards

Mat. No.
-
EU
-
AISI/ASTM
418
UNS
S41800
Other
Greek Ascoloy 418
Alloy 418 is a temperature resistant chrome-tungsten-nickel martensitic alloy.
649 °C' ye kadar yüksek stresli motor komponentlerinde kullanılmaktadır. Derin sertleşebilirlik ve iyi sürünme dayanımı, temper ve stres korozyon çatlağına karşı dirençlidir.
Heat treatment involves heating it to a temperature of 980-1010°C °followed by oil/air cooling, °and then subjecting it to a double tempering process at a minimum temperature of 620°C for a minimum of 2 hours.

Chemical Composition & Mechanical and Physical Properties

C%
0.15-0.20
Mn%
0.50 max
P%
0.030 max
P%
0.030 max
Si%
0.030 max
Cr%
12.00-14.00
Ni%
0.50 max
Mo%
1.80-2.20
W%
2.50-3.50
Fe%
Rest
Hardness HB
302-352
0.2% Yield Strength Rp N/mm2
760 min
Tensile Strength Rm N/mm2
965 min
Elongation A5 %
15 min
Precipitation hardened

Application areas

Compressor parts, Steam and gas turbine blades, High temperature bolts.

Specifications

AMS 5508 (sheet/strip/plate)
AMS 5616 (bar/forging/wire)
ASTM A565 (Grade 615)
SAE J467 (Greek Ascoloy)
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