BS1501-430A - Macsteel

Steel MakingSteel is normally supplied from a basic oxygen furnace but could also be supplied fromelectric arc furnaces using clean internal scrap and direct reduced iron.All steel is desulphurised to maintain a high degree of cleanliness and is made fully killedand fine-grained from continuously cast slabs.Full shrouding techniques and automatic mould level control are applied to ensure superiorinternal and surface quality.Chemical compositionTable 1 shows the chemical composition as specified by BS 1501: Part 1: 1980.Table 1. Chemical composition (ladle analysis, percent) as specified in BS 1501: Part 1: 1980Type161Grade430CmaxMn Si PmaxSmaxAlminCrmaxCumaxMomaxNimaxNmaxCEmax0.25 0,60- 0,10- 0,030 0,030 - 0,25 0,30 0,10 0,30 0,012 0,411,40 0,35Heat treatment conditionPlates up to and including 40mm are supplied as rolled unless normalizing isrequested by the purchaser.Where cold forming of plate thicknesses thinner than or equal to 40mm is intended,normalizing is a prerequisite.Plates over 40mm thick are supplied normalized unless supply in the as rolledcondition is required, in which case the test pieceswill be normalized.Plates up to and including 40mm are supplied as rolled unless normalizing isrequested by the purchaser.Where cold forming of plate thicknesses thinner than or equal to 40mm is intended,normalizing is a prerequisite.Plates over 40mm thick are supplied normalized unless supply in the as rolledcondition is required in which case the test pieces will benormalizedMechanical PropertiesRoom temperature tensile propertiesTable 2. Mechanical properties at room temperature as specified in BS 1501: Part 1: 1980TypeNominalthickness t(mm)161 grade 430 t ≤ 1616 < t ≤ 4040 < t ≤ 6363 < t ≤ 80TensileStrength(MPa)430 – 550430 – 550430 – 550430 - 550Minimum yieldStrength(MPa)250240230220MinimumElongation(%)23232221Note:1. Gauge length 5,65√S₀. Refer to paragraph 20.1 in the specification.