AISI 8620RH alloy Steel is a high quality specified hardenability bands Alloy Structural steel, It belong to the high quality low carbon,Low alloy chromium, molybdenum, nickel case hardening steel. Oil Quenched & Tempered Hardenss is 28-34 HRC. Moreover, AISI 8620RH steel Annealing delivery hardenss less than 250HB.

AISI 8620RH Alloy structural steel properties is a Nickel chromium molybdenum alloy steel specification. Furthermore, 8620RH With a lower carbon content range, So AISI 8620RH alloy steel have good weldability. And AISI 8620RH Steel is equivalent to Din 21NiCrMo2 | W-Nr 1.6523, GB 20CrNiMo, BS 805M20, NF 20NCD2,JIS SNCM220 Steel. Most applications can replace each others.

Chemical composition

C(％)	0.18～0.23	Si(％)	0.15～0.35	Mn(％)	0.70～0.90	P(％)	≤0.035
S(％)	≤0.040	Cr(％)	0.40～0.60	Mo(％)	0.15～0.25	Ni(％)	0.40～0.70

Heat treatment Related

Annealing of 8620RH Alloy structural steel

Slowly heated to 850 ℃ and allow enough times, let the steel to be thoroughly heated, Then cool slowly in the furnace. The 8620RH alloy steel will get MAX 250 HB （Brinell hardness）.

Hardening of 8620RH Alloy structural steel

Heated slowly to 880-920°C, Then after adequate soaking at this temperature quench in oil. Temper as soon as tools reach room temperature.

Mechanical Properties of 8620RH Alloy Steel

The mechanical properties of annealed AISI 8620RH alloy steel are outlined in the table below

Tensile	Yield	Bulk modulus	Shear modulus	Poisson’s ratio	Izod Impact
KSI	KSI	KSI	KSI		ft.lb
76900	55800	20300	11600	0.27-0.30	84.8

Applications of Steel 8620RH

AISI 8620RH steel is widely used for a variety of applications in the used in the automotive and engineering industries for toolholders and other such components. Typical applications such as valve bodies, pumps and fittings, Shaft, the high load of wheel, bolts, double-headed bolts, gears, etc