Billet 420 round steel 3.0-300mm 420 stainless steel bar good straightness quenching and tempering treatment

Billet 420 round steel 3.0-300mm 420 stainless steel rod straightness is good Quenching and tempering treatment 2Cr13 stainless steel has high hardness and good corrosion resistance in quenching state. Many of them are used for cutting tools, which are “cutting tools” martensitic steel, and also used for surgical tools. Stainless steel, such as Brinell high chromium steel, is also used for turbine blades, and has a wide range of applications.

2Cr13 density is 7.75g/cm3 Quenching hardness of 2Cr13: Generally, the quenching temperature of 2Cr13 is 980 ～ 1050 ℃. The hardness of oil quenching at 980 ℃ is obviously lower than that of oil quenching at 1050 ℃. The hardness of oil quenching at 980 ℃ is 45 ～ 50HRC, and the hardness of oil quenching at 1050 ℃ is 2HRC higher. However, the microstructure obtained after quenching at 1050 ℃ is coarse and brittle. It is suggested that better structure and hardness can be obtained by heating and quenching at 1000 ℃.

Product characteristics

Carbon C: 0.16 ～ 0.25 Silicon Si: ≤ 1.00 2CR13 Manganese Mn: ≤ 1.00 Sulfur S: ≤ 0.030 Phosphorus P: ≤ 0.040 Chromium Cr: 12.00 ～ 14.00 Nickel Ni: ≤ 0.60 allowed

Tensile strength σ B (MPa): quenching and tempering, ≥ 635 conditional

yield strength σ 0.2 (MPa): quenching and tempering, ≥ 440 elongation δ 5 (%): quenching and tempering, ≥ 20 reduction of area ψ  (%): quenching and tempering, ≥ 50 impact energy Aku2 (J): quenching and tempering, ≥ 63 hardness: annealing, ≤ 223HB; Quenching and tempering gt; 192HB

Heat treatment specification and metallographic structure: heat treatment specification: 1) annealing, slow cooling at 800~900 ℃ or fast cooling at about 750 ℃; 2) Quenching, 920-980 ℃ oil cooling; 3) Tempering, fast cooling at 600-750 ℃. Metallographic structure: the structure is characterized by martensite.

Delivery status: generally, the goods shall be delivered in heat treatment status, and the type of heat treatment shall be indicated in the contract; Unspecified items shall be delivered as per non heat treatment status.

Delivery status: generally, the goods shall be delivered in heat treatment status, and the type of heat treatment shall be indicated in the contract; Unspecified items shall be delivered as per non heat treatment status.

Purpose: to make parts resistant to weak corrosion medium and bearing load, such as turbine blades, hydraulic press valves, bolts, nuts, etc., which are mainly used for parts requiring high toughness, certain rust resistance and bearing impact load, such as cutting tools, blades, fasteners, hydraulic press valves, thermal cracking sulfur corrosion resistant equipment, etc., and also to make equipment and components resistant to weak corrosion medium under normal temperature conditions.

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