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Grade 443S65
Old Grade
Corresponding Standard BS 970-4-1970
Specification for Wrought steels in the form of blooms,billets,bars and forgings--Part 4:Valve steels
Classification Alloy Steel
443S65 Chemical Element Composition Content (%)
Component C Si Mn P S Cr Ni Cu ◎ Mo ◎ Se
Minimum Value 0.75 1.75 0.3 - - 19 1.2 - - 0.15
Maximum Value 0.85 2.25 0.75 0.04 0.03 21 1.7 0.3 0.3 0.3
1 Approximate Comparison Table Martensitic Heat-Resistant Steel
China Taiwan, China Japan South Korea United States Germany France United Kingdom
GB ISC CNS JIS KS UNS SAE DIN EN/DIN W-Nr. NF EN/NF BS EN/BS
80Cr20Si2Ni
(8Cr20Si2Ni) 		S48380 SUH 4 SUH 4 STR 4 S65006 HNV6 X80CrNiSi 20 1.4747 Z80CSN 20-02 443S65
2 Approximate Comparison Table Valve Steel
China Taiwan, China Japan South Korea United States Germany France European Standard Russia United Kingdom
GB ISC CNS JIS KS Commercial Grade UNS SAE DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST BS EN/BS
80Cr20Si2Ni
(8Cr20Si2Ni) 		S48380 4 SUH 4 STR 4 Sil XB S65006 HNV6 X80CrSiNi 20 1.4747 Z80CNS 20-02 X80CrSiNi 20 1.4747 80Х20Н2С2 443S65

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