Table 1: Statistical analysis of the yield strength of steel sheets.

Grade Thickness Number
n
μfy/MPa σfy/MPa μKfy μKM VKM
LG550 A t < 0.6mm 528 724.8786 20.2302 1.3180 1.2389 0.0279
B 0.6mmt ≤ 0.9mm 3396 664.3919 20.9933 1.2080 1.1355 0.0316
C 0.9mm< t ≤ 1.2mm 1552 595.5714 22.3948 1.0829 1.0179 0.0376
D t > 1.2mm 2579 538.3253 16.2784 0.9788 0.9200 0.0302
S350 0.6mmt ≤ 2.0mm 73 407.1762 34.6437 1.1634 1.0936 0.0851
S280 0.6mmt ≤ 2.0mm 41 322.7982 23.0693 1.1529 1.0837 0.0715