Steel Square 75Mm. In Std Length To Specn Bs: 970Pt-I-83 Gd 817 M40 As Rolled & Annealed. Test Piece ,Steel Square 100 Mm To Specification Bs: 970 Pt-1-83,Gd 817 M40 Or Is: 5517-78, Gd 40 Ni6 Cr4 Mo3 Suppl Quantity: 3623