Grade NiCr 20 TiAl
Corresponding Standard ISO 683-15-1992
Valve steels for internal combustion engines
Classification Nickel and Nickel Alloys
NiCr 20 TiAl Chemical Element Composition Content (%)
Component Fe C Si Mn P S Cr Ni Cu Ti B Co Al
Minimum Value - 0.04 - - - - 18 65 - 1.8 - - 1
Maximum Value 3 0.1 1 1 0.02 0.015 21 - 0.2 2.7 0.008 2 1.8
NiCr 20 TiAl Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Reduction of Area
ψ
%
Hardness
HBW
Solution Treatment (ST) + Precipitation Hardening (P) 1100~1400 ≥725 ≥15 ≥25 HRC
≥32
Approximate Comparison Table
China United States International Organization for Standardization European Standard
GB SAE ISO EN Numerical Grade
GH4080A HEV5 NiCr20TiAl NiCr20TiAl 2.4952

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