Influence of surface porosity on fatigue life of additively manufactured ASTM A131 EH36 steel

•Studied scanning speed effect on the fatigue behavior of SLMed EH36 steel samples.•Evaluated the stress concentration effect of 3D surface pores using FEM method.•Evaluated the fatigue lifetime using stress-life and strain-life methods.•Evaluated the fatigue crack propagation life using LEFM model.•Validated the conventional algorithms and models with experimental results.