Grade ZG 340-640
Old Grade
Corresponding Standard GB /T 11352-2009
Carbon Steel Castings for General Engineering Purpose
Classification Carbon Steel
ZG 340-640 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu Mo V
Minimum Value - - - - - - - - - -
Maximum Value 0.6 0.6 0.9 0.035 0.035 0.35 0.4 0.4 0.2 0.05
ZG 340-640 Mechanical Properties
Tensile Strength
σb
Mpa
Yield Point
σs
Mpa
Elongation or Extension Rate
δ
%
Reduction of Area
ψ
%
Impact Energy Absorption
KV2
J
≥600 ≥340 ≥10 *
≥18
KV:≥10*
KU:≥16*
1 Approximate Comparison Table Cast Steel
China Germany European Standard
GB DIN EN/DIN EN Numerical Grade
ZG310-570
ZG340-640
ZGD345-570
GS-60N GE300 1.0558
2 Approximate Comparison Table Cast Steel
China United States Russia
GB UNS GOST
ZG340-640 J05000 55Л
3 Approximate Comparison Table Carbon cast steel for engineering and structural purposes
China Japan United States International Organization for Standardization France United Kingdom
GB ISC JIS UNS ISO NF EN/NF BS EN/BS
ZG340-640
(ZG55)
C23464 340-550 J05000 340-550 (GE370) A5

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