BS 3HR 501:2011 Specification for nickel-chromium-cobalt-titanium- aluminium heat-resisting alloy cold drawn wire for springs and springs (Nickel base, Cr 19.5, Co 18.0, Ti 2.5, Al 1.5)
2011BS 3HR 501:2011 Specification for nickel-chromium-cobalt-titanium- aluminium heat-resisting alloy cold drawn wire for springs and springs (Nickel base, Cr 19.5, Co 18.0, Ti 2.5, Al 1.5)
1973BS 2HR 501:1973 Specification for nickel-chromium-cobalt-titanium-aluminium heat-resisting alloy cold drawn wire for springs (nickel base, Cr 19.5, Co 18.0, Ti 2.5, Al 1.5)