35CrMoV directory 

 35crmov introduced 35CrMoV, alloy structural steel. Uniform digital code: A31352 Standard: GB / T 3077-1988 
 Chemical composition 
 [Chemical composition] (wt) (%) Carbon C: 0.30 ~ 0.38 Si Si: 0.17 ~ 0.37 Manganese Mn: 0.40 ~ 0.70 S S: to allow the residual phosphorus content ≤ 0.035 P: ≤ 0.035 to allow the residual content 
 35CrMoV alloy steel 
 Chromium Cr: 1.00 ~ 1.30 Ni: to allow the residual content ≤ 0.030 Copper Cu: ≤ 0.030 to allow the residual content of vanadium V: 0.10 ~ 0.20 Mo Mo: 0.20 ~ 0.30 edit the mechanical properties of this paragraph 
 [Mechanical Properties] sample blank size (mm): 25 Heat treatment: first quenching temperature (℃): 900; Coolant: Oil second quenching temperature (℃): tempering heating temperature (℃): 630; coolant: water, oil tensile strength σb (MPa): ≥ 1080 (110) yield strength σs (MPa): ≥ 930 (95) 
 35CrMoV steel 
 Elongation δ5 (%): ≥ 10 Reduction of ψ (%): ≥ 50 Impact energy Akv (J): ≥ 71 impact toughness αkv (J/cm2): ≥ 88 (9) Brinell hardness (HBS100 / 3000) (annealing or tempering state): ≦ 241 
 Delivery Status 
 Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract. 
 [Main features] that the higher the strength of steel, good hardenability, quenching in oil critical diameter of 25 ~ 108mm, heat treatment has a slight temper brittleness, but the plastic deformation of steel in the cold low, poor welding . 
 35crmov Introduction 

 [Application examples] the steel quenched and tempered before use in the manufacturing of heavy or medium-sized machine, used to make the work under high stress the important parts, such as long in the 500 ~ 520 ℃ work under the turbine impeller, advanced turbine blower and the compressor rotor, cover plates, shaft drive, the efficiency of the generator shaft and powerful little engine parts. 
 [] ① steel representation of the beginning of the two figures that the carbon content of steel, the average carbon content of the very few that, as 40Cr, 25Cr2MoVA alloy steel pipe ② main alloying elements, in addition to individual micro-alloying elements, in general, to said a few percent. When the average alloy content of <1.5%, the steel elements are generally marked only symbols, not marked content, but prone to cause confusion in those special circumstances, after the element symbol can also be marked with the number "1", such as steel "12CrMoV" and "12Cr1MoV", the former chromium content of 0.4-0.6%, 0.9-1.2% for the latter, all the remaining ingredients the same. When the average content of alloying elements ≥ 1.5%, ≥ 2.5%, ≥ 3.5% ... ..., the symbol of the element content should be marked on the back, can be expressed as the corresponding 2,3,4 ... etc. For example 18Cr2Ni4WA. ③ steel vanadium V, Ti Ti, Al AL, boron B, RE alloys of rare earth elements are micro-alloying elements, although very low levels, should bid out in steel. For example 20MnVB steel. To 0.07-0.12% vanadium, boron 0.001-0.005%. ④ High quality steel in the steel should be added the last "A", as distinct from the general high quality steel. ⑤ special purpose alloy steel, steel, known (or suffix) on behalf of the steel uses symbols. For example Lo dedicated 30CrMnSi riveting steel, steel, said to ML30CrMnSi. Alloy seamless pipe and the existing relationship and differences between the two, can not be confused. Alloy steel pipe is produced in accordance with the material (ie material) to define the name suggests is made of alloy tube; and seamless steel pipe according to the production process (with seamless sewing) to the definition, is different from the seamless seamed tube, including the Longitudinal and spiral.