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15-5 VAR

(UNS S15500) A Vacuum Arc Remelted (VAR) chromium-nickel-copper precipitation hardening martensitic stainless steel with high strength and moderate corrosion resistance. High strength up to about 600ºF. Hardened through age hardening (precipitation hardening) at 900, 1075 or 1150ºF with 900ºF age yielding the highest strength.


Element C Mn Si Cr Ni Cu Cb
15-5 VAR 0.04% max 0.70% max 0.35% max 14.75% max 4.75% max 3.50% max 0.30% max

Physical Constants

Density0.282 lbs/in3
Density7.80 g/cm3


Solution Treat1900ºF soak 30-60 min. air or oil cool
Age Harden900-1150ºF

Viking Forging Parameters

Rings24" O.D. X 6" long500 lbs.
Sleeves16" O.D. X 12" long500 lbs
Disks26" O.D. X 6.5" long500 lbs.
Round Bar12" Dia. X 96" long2600 lbs.
Square/Rectangular Bar12" square X 96" long2600 lbs.
Blocks14" X 14" X 14"750 lbs.
Shafts12" Dia. X 96" long2600 lbs.

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