Attributes . 14 to 30 HRC (1 Layer, As Welded), 28 to 34 HRC (1 Layer, Work-Hardened), 26 to 32 HRC (2 Layers, As Welded), 32 to 36 HRC (2 Layers, Work-Hardened), 38 to 42 HRC (2 Layers, Flame-Hardened/Water-Quenched), 25 to 34 HRC (3 Layers, As Welded), 35 to 38 HRC (3 Layers, Work-Hardened) . Names