Surface heat treatment methods for ASTM A302 pressure vessel steel sheet

After quenching and tempering, 40Cr alloy steel plate and ASTM A302 pressure vessel steel sheet sheet have good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity. The hardenability of steel ASTM A302 pressure vessel steel sheet is good. It can be hardened to Ф28 ～ 60mm during water quenching and Ф15 ～ 40mm during oil quenching. In addition to quenching and tempering, this steel is also suitable for cyanidation and induction hardening. The cutting performance is better. When the hardness is HB174 ～ 229, the relative cutting workability is 60%. 40Cr alloy steel is suitable for making medium-sized plastic molds.

For stainless steel plate cutting, the choice of cutting method is determined by the thickness of steel plate. If the thickness of ASTM A302 pressure vessel steel sheet stainless steel plate is more than 20 mm, flame cutting is adopted, while the thin plate is suitable for plasma cutting. In addition, if the cutting requirements are relatively high, laser cutting can be used. In addition, if the ASTM A302 pressure vessel steel sheet stainless steel plate is used as a billboard, plasma cutting is adopted, Because it uses thin plates.

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