There may be no difference at all. In structural steel, 44W is a perfornamce rating (minimum yield strength 44,000psi). 1020 is steel chemistry (non-alloyed steel with 2.0% carbon). Quite often 44W is 1018 (1.8% carbon) or 1020 in composition. If your steel dealer is selling you 44W, ask about the composition.
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44W steel is a structural steel used mainly in construction applications, while 1020 steel is a low carbon steel commonly used in manufacturing processes due to its good machinability and weldability. The main difference is in their composition, with 44W having higher strength and hardness compared to 1020 steel.
A36 steel is a standard mild steel grade with a minimum yield strength of 36,000 psi, while 44W/300W is a Canadian steel grade with a minimum yield strength of 44,000 psi. The main difference lies in the yield strength, with the 44W/300W grade being stronger and more suitable for structural applications that require higher strength.
38W and 44W are designations for two different grades of structural steel, with 44W being stronger than 38W. The numbers in their designations refer to their minimum yield strength in kilopounds per square inch (ksi), with 38W having a minimum yield strength of 38 ksi and 44W having a minimum yield strength of 44 ksi. The choice between the two grades depends on the specific requirements of the application in terms of strength and performance.