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        Address: Section 2, South Ring Street, Hongwei District, Liaoyang City, Liaoning Province

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        What is non-alloy steel, low alloy steel and alloy steel?

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        What is non-alloy steel, low alloy steel and alloy steel?

        Date of release:2018-09-27 Author: Click:

        The specified content of any element specified in steel conforms to the limit value range of the corresponding elements of non-alloy steel, low alloy steel and alloy steel, and these steels are referred to as non-alloy steel, low alloy steel and alloy steel.

        1 non-alloy steel includes carbon steel (ordinary carbon structural steel, high-quality carbon structural steel, carbon tool steel, carbon spring steel, free-cut carbon structural steel), pure iron (electrical pure iron, raw pure iron) ) and other special non-plate steel with special properties.

        2 The heat treatment is not specified, but the annealing, normalizing, stress relieving, and softening treatment are not treated as heat treatment.

        3 If the product standard or technical conditions stipulate, the characteristic value shall meet the following conditions:

        The highest carbon content ≥0.10%

        The highest sulfur and phosphorus content ≥0.045%

        The highest nitrogen content ≥0.007%

        The lowest tensile strength ≤ 690MPa

        Minimum yield point or yield strength ≤360MPa

        The lowest elongation (Lo = 5.65) ≤ 33%

        Minimum diameter of the bending center ≥0.5X thickness of the test piece

        The lowest impact energy (20 ° C, V-shaped, longitudinal standard sample) ≤ 27J

        Rockwell hardness highest value (HRB) ≥60

        The above specified values of mechanical properties refer to the properties measured by longitudinal or transverse specimens made of steel having a thickness of 3 to 16 mm.

        4 No other quality requirements are specified.

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