K.4Results of programme B

Details can be found in the report, reference [8]. The materials are:

• — two sheet materials: a low carbon malleable steel and an austenitic stainless steel (thickness 2,5 mm);
• three grades of bars: a constructional steel, an austenitic stainless steel, a heat treated high strength steel (diameter 20 mm).

Tests were carried out using flat test pieces for the first two materials (18 participants, 5 tests for each material) and 10 mm diameter cylindrical test pieces for the bars (18 participants, 5 tests for each material). The width of the flat test piece was 20 mm and the initial gauge length 80 mm. The results are summarized in table K.2. No distinction is made between lower yield strength ( $R_{\mathrm{eL}}$ ) and proof strength $\left(R_{\mathrm{p} 0,2}\right)$ in the case of materials with yield points. For the cylindrical test pieces, the elongation values correspond to a gauge length equal to five diameters.

Table K.1 — Results from interlaboratory tensile tests: Test programme A

Yield strength with 0,2 % offset, MPa

Tensile strength, MPa

Elongation in 5 diameters gauge length, %

Reduction of area, %

Table K.2 — Results from interlaboratory tensile tests: Test programme B

Yield strength (0,2 % offset or lower yield strength), MPa

Tensile strength, MPa

Elongation after fracture, %

Reduction of area, %