Grade Z25CNWS20-09
Corresponding Standard NF A 35-579-1991
Iron and steel. Stell for Valves. Types.
Classification Alloy Steel
Z25CNWS20-09 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni W
Minimum Value 0.2 0.75 - - - 19.5 8.5 1.5
Maximum Value 0.3 1.5 2 0.04 0.03 21.5 10.5 2.5
Z25CNWS20-09 Mechanical Properties
Heat Treatment or Condition
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Reduction of Area
ψ
%
+Q1000~1050
+T700~750
≥800 ≥380 ≥25 ≥35

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