65Mn High Carbon Steel

65Mn High Carbon Steel

Brand number 65Mn

China ISC U21652

It corresponds to standard GB /T 699-1999

High quality carbon structural steel

Quality Carbon Structural Steels

Classified carbon steel

Properties Strength elasticity fatigue resistance

Tag spring steel

Instructions

After heat treatment and cold drawing hardening, the strength is high, with certain toughness and plasticity; Under the same surface state and full quenching condition, the fatigue limit is similar to that of alloy springs

. However, the hardenability is poor, mainly used for smaller size springs, such as pressure regulating spring, force measuring spring, general mechanical round, square coil springs or drawn into steel wire for small

Type mechanical spring.

It can make spring washer, slotted elastic cylindrical pin, open retaining ring and other standard parts

This standard applies to high-quality carbon structural steel bars with a diameter or thickness not greater than 250mm, and can also be provided with a diameter or thickness greater than 250mm after negotiation between the supply and demand parties

High quality carbon structural steel bar.

① The grades listed in the table are high quality steel. High quality steel, in the grade suffix A, the last digit of the unified digital code is changed to 3; Super high quality steel, in the grade suffix E, the last digit of the unified digital code is changed to 6; Boiling steel, grade suffix F, the last digit of the unified digital code is changed to 0; Semi-killed steel, grade suffix b, unified number code last digit is 1

High-quality steel P≤0.035%,S≤0.035%

High quality steel P≤0.030%,S≤0.030%

Super high quality steel P≤0.025%,S≤0.020%

② 08 steel with aluminum deoxidation smelting killed steel, the lower limit of manganese content is 0.25%, silicon content is not more than 0.03%, aluminum content is 0.02%~0.07%, this time the steel grade is 08Al

③ By agreement between the supply and demand parties, 08~25 steel can supply semi-killed steel with silicon content not more than 0.17%, and its grade is 08b~25b

④ The allowable copper content of steel smelted with scrap steel is not more than 0.30%; The copper content of steel for hot pressure processing should not be greater than 0.20%

⑤The silicon content of boiling steel for cold stamping should not be greater than 0.03%

⑥The nitrogen content of steel smelted by oxygen converter should not be greater than 0.008%

ⓐ Delivery status of unheat treated steel Delivery hardness HBS10/3000 data is shown in the first row of the table; Annealed steel hardness HBS10/3000 data are shown in the second row of the table

ⓑHeat treatment of steel samples: normalizing temperature 830°C

① For steel with a diameter or thickness of less than 25mm, the heat treatment is carried out on a sample blank with the same cross-section size as the finished product.

(2) Table normalizing recommended holding time is not less than 30min, air cooling; The recommended holding time for quenching is not less than 30min, 70, 80 and 85 steel oil cooling, and the rest steel water cooling; The recommended holding time for tempering is not less than 1h.

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Application

• Manufacture mechanical parts. 65Mn Carbon Steel has very high strength and wear resistance, so it is particularly suitable for the manufacture of mechanical parts that require high strength and wear resistance. Such as engine parts, auto parts, cutting tools, springs, bearings, shaker, tank, wear loss parts, stone processing and other fields of parts.
• Make building materials. 65Mn Spring Steel can be used to manufacture steel bars in the construction industry, and its high strength can withstand greater pressure and tension, helping to ensure the reliability and stability of the building structure. In addition, the wear resistance of the material can also improve the service life of the building material.
•  Manufacture cutting tools. 65Mn Steel with high strength, high hardness, good wear resistance and corrosion resistance, can be used to manufacture a variety of milling cutters, tools, saw blades and other cutting tools, suitable for processing a variety of metal and non-metallic materials.
• Manufacture photovoltaic solar panels. Stainless Steel 65Mn can be used as a substrate material for solar panels, its stable chemical properties and good mechanical strength can ensure efficient power generation of panels, and can resist oxidation and corrosion and other effects.
•  Make bulletproof material. Wholesale 65mn spring steel can be used to manufacture bulletproof plate materials and body armor after special treatment, and its high strength and hardness can provide reliable security.