Among commonly used metal alloys, stainless steel and tempered structural aluminum have relatively high tensile strengths 90,000 and 45,000 PSI, respectively Impact Strength Impact strength is a measure of how much impact or suddenly applied force a metal can take before it failsTensile Strength The maximum load in tension (pulling apart) which a material can withstand before breaking or fracturing Yield Strength The maximum load at which a material exhibits a specific permanent deformation Proof Load An axial tensile load which the product must withstand without evidence of any permanent set 1MPa = 1N/mm 2 = 145Table 2 Filler/Base Metal Strength Comparison in AWS D11, Table 31, Group III Table 3 Varying yieldtotensile ratios prevent matching both the yield and tensile strengths (data from AWS D1198, Table 31) *Based on minimum specified values Base Metal AWS D11,Table 31, Group III Base Metals Avg Fy/Fu* Group I (mild steel) Group III Stainless Steel Basic Information Yield strength ...