GB 20Mn

GB 20Mn

Steel 20Mn is a strong and durable material that has a wide range of uses in various industries. It possesses a high level of toughness, which makes it an excellent choice for applications that require resistance to wear and tear, fatigue, and impact.

The steel 20Mn is also highly versatile and can be easily machined, welded, and fabricated into different shapes and sizes. Its excellent mechanical properties and easy workability make it an ideal choice for a variety of applications, including structural components, machinery parts, and automotive components.

Moreover, steel 20Mn has a good resistance to corrosion, which makes it an excellent choice for use in harsh environments or applications that involve exposure to moisture, chemicals, and other harmful substances.

20Mn Chemical composition:

Brand C Mn Si P Cr Ni Cu S

20 mn 0.17 0.23 0.70 1.00 0.17 0.37 0.035 < < = = < = 0.25 < = 0.25 < 0.25 = 0.035

20Mn Mechanical properties:

Steel plate tensile strength yield strength elongation section shrinkage

20Mn >=450 (46) >=275 (28) >=24 >=50

20Mn Application range:

Suitable for gear, crank shaft, bracket, hinge, screw, nut, riveted welding structure, manufacturing oil tank, etc. Cold area farm implements, such as cream cans. At the same time, it is used to manufacture carburized parts with less requirements on the surface and the heart, and the section size and diameter of <50mm, such as the pinion and shaft that replace 20Cr steel in the manufacture of automobiles, tractors and machine tools, and the piston pin, the cross pin head, the diesel engine sleeve, the valve tip rod, the transmission lever, the steel sleeve and so on. In addition, the steel can also be used in hot rolling and normalizing state for the manufacture of riveted welds and screws, nuts, etc.

The difference between 20Mn and 20Mn2:

These two kinds of steel chemical composition (carbon content is the same, manganese content is different), mechanical properties, heat treatment methods are different, the main differences are as follows: 20Mn- is a high-quality carbon structural steel chemical composition (%) : C: 0.17~0.23Si: 0.17~0.37Mn: 0.7~1.00Cr≤ 0.25Ni≤ 0.30Cu≤0.25 Mechanical properties: Tensile strength ≥450MPa Yield limit ≥275MPa elongation ≥24% section shrinkage ≥50% Heat treatment: Normalizing, carbonizing, nitriding 20Mn2- alloy structural steel Chemical composition (%) : C: 0.17~0.24Si: 0.17~0.37Mn:1.40~1.80 Mechanical properties: Tensile strength ≥785MPa Yield limit ≥590MPa Elongation ≥10% section shrinkage ≥40% impact absorption work ≥47Aku2/J Heat treatment: quenching (water, oil quenching), tempering (water, air cooling), carburizing

1, available steel plate specification range: thickness 6-700mm, width 500-4800mm, length 3000mm-27000mm, single weight maximum 30.00 tons. According to the need for larger specifications, single steel plate;

②, available types of steel plate: carbon structure steel plate, low alloy high strength steel plate, bridge steel plate, building structure steel plate, shipbuilding and offshore platform steel plate, boiler and pressure vessel steel plate, mold steel plate, alloy structure steel plate, oil and gas transmission pipeline steel plate, high strength and high toughness steel plate, corrosion resistant steel plate, composite steel plate, wear-resistant steel plate more than 300 domestic and foreign brands ;

③, can be used for inspection requirements, Z15-Z35 thickness direction performance requirements, high strength and high toughness requirements of steel plate;

④, available for steel plate delivery status: hot rolling, controlled rolling, normalizing rolling, normalizing, tempering, quenching, annealing, normalizing and tempering, tempering, etc.;

⑤, the ship board has obtained CCS, ABS, LR, BV, VL, RINA, NK, KR and other nine national classification societies certification.

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