35CrMov alloy steel bar

35CrMoV alloy structural steels. Unified digital code: A31352
Standard: GB / T 3077-1988

35CrMoV alloy chemical composition:

35CrMoV alloy mechanical properties:
Blank sample size (mm): 25 Heat treatment : the first quenching temperature (℃): 900; Coolant: Oil
The second quenching temperature (℃): tempering heating temperature (℃): 630; Coolant: water, oil
Tensile strength σb (MPa): ≥ 1080 (110) Yield strength σs (MPa): ≥ 930 (95)
Elongation δ5 (%): ≥ 10 Reduction of area ψ (%): ≥ 50
Impact energy Akv (J): ≥ 71 Impact toughness values ​​αkv (J/cm2): ≥ 88 (9)
Brinell hardness (HBS100/3000) ( annealing or tempering state ): ≦ 241 [2] Delivery Status

Delivery status : to heat treatment ( normalizing, annealing or tempering ) or without heat treatment delivery , the delivery status should be specified in the contract.

35CrMoV alloy representation:
① steel beginning of a two-digit number indicates the carbon content of steel to the average carbon content of the few that, as 40Cr, 25Cr2MoVA alloy tube
② main alloying elements in steel , in addition to individual micro- alloying elements , typically a few percent . When the average alloy content < 1.5% , steel generally mark the element symbol not indicate the content , but prone to cause confusion in exceptional 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 % and 0.9-1.2 % , the remaining ingredients are all the same . When the average content of alloying elements ≥ 1.5%, ≥ 2.5%, ≥ 3.5% ...... when , after the element symbol should be marked content, can be expressed as the corresponding 2,3,4 ...... and so on. For example 18Cr2Ni4WA.
③ Steel Vanadium V, Ti Ti, Al AL, boron B, RE alloys of rare earth elements are micro-alloying elements , although the content is very low , the steel should bid out . For example 20MnVB steel. 0.07-0.12 % vanadium , 0.001 to 0.005 % of boron .
④ High quality steel should finally add "A" in the steel , as distinct from the general high quality steel .

⑤ special purpose , steel, known ( or suffix ) represents the symbol of the steel purposes. For example riveting Lo dedicated 30CrMnSi steel, steel represented as ML30CrMnSi.

Alloy steel pipe is produced in accordance with the material ( ie material ) to define , as the name suggests is made ​​alloy tubes ; and seamless steel pipe according to the production process (with seam seamless ) to define , is different from the seamless pipe joints, including the Longitudinal and spiral