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For a special tool,A3 and 45# Steel which one is better?

Title
A3 Steel(Q235)


Chemical composition

C(%) Si(%) Mn(%) P(%)
S(%) Cr(%) Mo (%) V(%)
0.95~1.05 0.10~0.50 0.40~1.00 ≤0.030 ≤0.040 4.75~5.50 0.90~1.40
0.15~0.50
45# steel
45 Steel Chemical Composition
Chemical Composition %
Steel Grade C Si Mn P (≤) S (≤) Cr (≤) Ni (≤) Cu (≤)
45 0.42-0.50 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.30 0.25


Because 45# Steel  C composition< A3 Steel when steel is going to heating treatment, Hardness is more lower,So if a tool made by A3 steel is lower quality than 45# Steel, and life is short tool.



And The Steel price  45# steel > A3 Steel, So there are many very cheap tools in the market, 



So, In China, the A3 steel tool is known as  low quality tool