$1.7 Simple Stress and Strain 7 600 Mild steel 450 E Copper 300 Alumnium 150 2 6 Strain, Fig.1.6.Typical stress-strain curves for hard drawn wire materials-note large reduction in strain values from those of Fig.1.5. 00 Gloss reinforced polycarbonate -Nylon-dry type 60 Unreinforced polycorbonate 40 Nyion-wet type 20 20 30 40 50 Stroin, Fig.1.7.Typical tension test results for various types of nylon and polycarbonate. After completing the standard tensile test it is usually necessary to refer to some"British Standard Specification"or"Code of Practice"to ensure that the material tested satisfies the requirements,for example: BS4360 British Standard Specification for Weldable Structural Steels BS970 British Standard Specification for Wrought Steels. BS153 British Standard Specification for Steel Girder Bridges. BS449 British Standard Specification for the use of Structural Steel in Building,etc.$1.7 Simple Stress and Strain 7 Strain, % Fig. 1.6. Typical stressstrain curves for hard drawn wire material-note large reduction in strain values from those of Fig. 1.5. Glass remforced polycarbonate eo ? ’ I I / ,Unreinforced pdycnrbonote c, Y I I I I I 0 10 20 30 40 50 Strain, % Fig. 1.7. Typical tension test results for various types of nylon and polycarbonate. After completing the standard tensile test it is usually necessary to refer to some “British Standard Specification” or “Code of Practice” to ensure that the material tested satisfies the requirements, for example: BS 4360 BS 970 BS 153 BS 449 British Standard Specification for Weldable Structural Steels. British Standard Specification for Wrought Steels. British Standard Specification for Steel Girder Bridges. British Standard Specification for the use of Structural Steel in Building, etc