41 Cr4 / 5140 / 40 Cr Professional Steel Forged Rings For Medium Load Parts

41Cr4 / 5140/40Cr professional forged steel rings

1.Application:

Used to manufacture medium speed and medium load parts after quenched and tempered, such as gear, shaft, worm, spline shaft, centre sleeve, etc.
Used to manufacture high hardness surface and wear resistance parts after high frequency case hardening and tempered, such as gear, main shaft, bent axle, mandrel, sleeve, pin, connecting rod, screw, nut, etc.

Chemical property:

C 0.37~0.44

Si 0.17~0.37
Mn 0.50~0.80

Cr 0.80~1.10

Ni ≤0.030
P ≤0.035

S ≤0.035

CU ≤0.030

Heat treatment:

The first quench heating temperature (850 ℃) :; Cooling agent: oil

The second quench heating temperature (℃) :-

Tempering heating temperature (520 ℃) :; Cooling agent: water, oil

Tensile strength (sigma b/MPa) : ≧ 980

The yield point (sigma s/MPa) : ≧ 785

Elongation (delta 5 / epigastric %) : ≧ 9

Section shrinkage rate (%) : ψ / ≧ 45

Impact absorption power (Aku2 / J) : ≧ 47

Brinell hardness (HBS100/3000) (annealing or high temperature tempering state) : ≦ 207

We, Shanghai Unite Steel are committed to integrate engineering steel resources in china and serve the global engineering steel market. Our company has more than 15 years of experience in steel researching, production, managing and sales. And our team mostly are based on and worked in national famous steel enterprise.

In the aspect of resources and information, we have established cooperative and stronger relationship with nearly hundred enterprises, either state-owned or private owned in china, such as: DAYE Special Steel-a famous steel enterprise with the longest steelmaking history; BAO Steel, and Dongbei Special Steel Group-the biggest special steel manufacturer; TPCO, VALIN-largest seamless steel tube production enterprise; What's more, we have built long, deep and close business relationship with dozens of steel companies, Sharing and holding equities with several steel enterprises. Because of the close cooperation with steel companies and our pioneering spirit, which can ensure us stay at the top competition, and ensure our customers get what they really want!