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Alloy steel is steel alloyed with a variety of elements in total amounts of between 1.0% and 50% by weight to improve its mechanical properties. Alloy steels are broken down into two groups: low alloy steels and high alloy steels. The difference between the two is somewhat arbitrary: Smith and Hashemi define the difference at 4.0%, while Degarmo, et al., define it at 8.0 %.[1][2] Most commonly, the phrase "alloy steel" refers to "low alloy" steels.

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Home » Alloy steel » Product introduction

SAE 8620, AISI 8620

  • Numbers: 2010122204
  • Model: SAE 8620, AISI 8620
  • Producers: China
  • Update time: 2010.12.22
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Product Description:

8620 is a low alloy case hardening steel which is supplied to American standards SAE 8620 and AISI 8620. 8620 can be carburised, which will achieve a tough core with a hard wear resistant case. 8620 provides a combination of toughness and wear resistance. 8620 is supplied in either the as rolled or annealed condition for subsequent case hardening.

  

 

 

TYPICAL ANALYSIS

 

 

 

C.

Si.

Mn

Ni.

Cr.

Mo.

0.20%  

 0.30%  

 0.80% 

0.60%

0.50%

0.20%


 

 

 


Mechanical properties are not stated in AISI 8620 or SAE 8620 as standard. The mechanical properties information for AISI 8620 / SAE 8620 is provided below as a guida. A test piece of 19mm diameter AISI 8620 / SAE 8620 is blank carburised for at least one hour at a temperature of between 880-930°C and allowed to cool at room temperature. The test piece of AISI 8620 / SAE 8620 is then re treated to 820-840°C and quenched in oil.

 

 

 

 

Condition

Tensile
Strength
Rm N/mm²


Elongation
%
5.665ÖSo


Izod
ft.lb
min.
 

KCV
J
min.

Hardness
HB

Test Piece
Size
mm

BC
Blank Case Hardened
(typical results)
SAE8620 / AISI8620

850

11

15

35

 -

19

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