
Heat-treatable steels, alloy steels and free-cutting steels Part 14: Hot-rolled steels for quenched and tempered springs
出版:International Organization for Standardization

专家解读视频
Provides the technical delivery requirements for round and flat bars and wire rods manufactured from alloyed steels intended for hot-formed and subsequently heat-treated springs or cold-formed and subsequently heat-treated springs.
DIN 17221 : 1988 - Corresponds
DIN 17221 E : 1988 - Corresponds
NFA 35 571 : 1996 - Similar to
SS 14 20 90 Ed. 7 (1985) - Similar
NFA 35 571:1996 - Similar
SS 14 22 54 Ed. 1 (1985) - Identical
SS 14 22 53 Ed. 1 (1985) - Identical
SS 14 22 30 Ed. 7 (1985) - Identical
JIS G 7751:2000 - Identical
JIS G 4801:2005 - Identical