15Cr, alloy structural steel.

   Unified Digital Code: A201525 Standard: GB / T 3077-1988

[] Chemical composition (mass fraction) (%)

Carbon C: 0.12 ~ 0.18

Si Si: 0.17 ~ 0.37

 Manganese Mn: 0.40 ~ 0.70

Sulfur S: to allow the residual content of ≤ 0.035

Phosphorus P: allow the residual content ≤ 0.035

Chromium Cr: 0.70 ~ 1.00

Ni: to allow the residual content of ≤ 0.030

 Copper Cu: to allow the residual content ≤ 0.030

      15Cr alloy structural steel
Mechanical properties of the sample [blank] Size (mm): 15

Heat treatment: the first quenching temperature (℃): 880; coolant: water, oil second quenching temperature (℃): 780 ~ 820; coolant: water, oil tempering heating temperature (℃): 200; cooling agents: water, air

Tensile strength σb (MPa): ≥ 735 (75)

Yield strength σs (MPa): ≥ 490 (50)

  Elongation δ5 (%): ≥ 11

Reduction of area ψ (%): ≥ 45

Impact energy Akv (J): ≥ 55

Impact toughness αkv (J/cm2): ≥ 69 (7)

Brinell hardness (HBS100/3000) (annealing or tempering condition): ≦ 179 Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be in the contract note out.

 [Main features]

This is a common low-carbon alloy carburizing steel in carburization can significantly increase the surface of the carbon content, increasing the carburizing depth, but when carburizing at high temperatures for a long time and tend to form a network of grain growth the tendency of carbide; of simple shapes, less demanding parts, the direct cooling after carburizing quenching, but the large deformation after heat treatment, another temper brittleness of steel hardenability of high carbon steel compared with 15 in the oil Hardenability in the critical diameter of 2 ~ 15mm, the critical quenching in water diameter 6 ~ 29mm. In addition, the shaping of high cold deformation of steel, good weldability, in the annealed condition can be very good machinability.

 [Application Examples]

This steel is mainly used to manufacture high speed and small cross-section (≤ 30mm), but the heart of the Ministry of higher strength and toughness and wear-resistant surface carburizing parts such as gears, cams, slide valve, piston, bushing , crank pin, piston pin, piston rings, couplings, shaft, bearing ring. In addition, this can also be used as a low-carbon martensitic steel, hardened steel, used to make strict demands on the deformation, but requires strength and toughness of the parts. 15Cr | Φ20 (rolled) 15Cr | Φ30 (rolled) 15Cr | Φ40 (rolled) 15Cr | Φ50 (rolled) 15Cr | Φ60 (rolled) 15Cr | Φ70 (rolled) 15Cr | Φ80 (rolled)

A large number of supply: 15Cr Baosteel Special Steel

Spot resources: 15Cr sheet, 15Cr round steel, 15Cr steel forgings varieties: 15Cr light round, 15Cr hair round, 15Cr forging round