hearth roll/radiant tube

Outline Kind of the material : SCH 13, SCH 15, SCH 21, SCH 24 (Austenite command heat resisting steel) Application : Continous heat treatment furnaces Roller for steel-making Function : Require heatproof and durability of abrasion as roller of product's conveyor and radiant tube inside by heat treatment to do heat treatment of steel-making product. Physical property Tensile strength(kg/mm2) SCH13 (50 and more), SCH15,21,24 (45 and more) Elongation(%) : 8 and more Yield strength(kg/mm2) : 24 and more Reference Gravity(g/cm3) : 7.8 Heat conductivity(w/mk) : 31.4 The coefficient of thermal expansion(20~200C) : 17.5 x 10-6 K-1 Matrix Matrix : AUSTENITE Carbide shape : Homogenously distribtional globular cementite