SAE 8620 Steel Bar

SAE 8620 Steel Bar

AISI 8620 Round Bar Equivalent Material

Internal Standard 8620
Standard Grades
USA ASTM A29/ /A29M 8620
DIN DIN 1654 1.6523/ 21NiCrMo2
BS EN 10084 1.6523/ 20NiCrMo2-2
BS BS 970 805M20
Japan JIS G4103 SNCM220

SAE 8620 Round Bar used for Pinions and Shafts, check Specifications

SAE 8620 Round Bar used for Pinions and Shafts

Table of contents

SAE 8620 Steel Bar Specification

Round Size (in)
  • 3/4 – 12(HR)
  • 10.5 – -24(RT-FGD)
  • 1/4 – 6(CF)
Standards
  • ASTM A29
  • ASTM A322
  • ASTM A108(CF)
TENSILE KSI 93
YIELD KSI 65
% R.A 25
HBW 162

Types of SAE 8620 Steel Bar

8620 Round Bar

AISI 8620 Round Bar

8620 Steel Flat Bar

8620 Steel Flat Bar

8620 square bar

8620 square bar

8620 Steel Rod

8620 Steel Rod

AISI 8620 Alloy Steel Bright bar

AISI 8620 Alloy Steel Bright bar

8620 Chromoly Steel Rectangular Bar

8620 Chromoly Steel Rectangular Bar

8620 Steel Bar Form & Size

Form Diameter Size(mm) Process
Round Bar 6-100 Cold Drawn
16-350 Hot Rolled
90-1000 Hot Forged
Flat W:120-1500, T:120-800 Hot Forged
Square
Block

AISI 8620 Round Bar Physical Properties

Melting point °C 2600
Density g/cm3 7.85
Machinability 65%
Poisson’s ratio 0.27-0.30
Thermal expansion at 20 °C. C 12.2*10^-6
Thermal conductivity 46.6 W/(m*K)
Specific heat capacity 477 J/(kg*K)
Electric resistivity 2.34*10^-7 (Ohm*m)

Mechanical Properties Of 8620 Round Bar

Section Size 63mm 30mm 11mm
Hardness HRC 16-29 23-35 31-41
Yield Strength Mpa >490 >590 >785
Tensile Strength Mpa 690-930 780-1080 980-1270
Charpy Impact J >41 >41 >41
Elongation % >11 >10 >9
Hardness HB 205-275 235-320 290-375

8620 Bar Hardenability Limits

Quenched End mm Rockwell Hardness Scale
HRC Min HRC Max
1.5 41 48
3 37 47
5 31 43
7 25 39
9 21 35
11 – 32
13 – 30
15 – 29
20 – 26
25 – 24
30 – 23
35 – 23
40 – 23

AISI 8620 Steel Round Bar Heat Treatment

Process Temperature (°C) Desc.
Annealing 820 – 850 Uniformly heated then cool
Normalizing 870 – 900 Air cool
Carburizing 900 – 950 Then Quenching and Tempering
Tempering 150 – 200 Temper after Quenching

Hardening Methods of 8620 Bar

  • Carburizing
  • Carbonitriding
  • Nitriding
  • Flame or induction hardening

SAE 8620 Steel Flat Bar Properties

GRADE SPECIFICATION Size CONDITION OF STEEL MACHINABILITY
E8620 AQ AMS 6274 2 3/4″ – 10″ As Rolled 65%
AMS 2301
E8620 BQ ASTM A534 3 1/2″ – 10″ As Rolled 65%
8620 ASTM A29/A322 3/16″ – 30″ As Rolled 65%
86L20 ASTM A322 1/4″ – 4″ As Rolled 85%
PURECUT 20 ASTM A108 3/8″- 4″ As Rolled/CF 85%

8620 HT Alloy Square Bar Chemical Composition

Grade 8620 8620 BQ 8620 AQ
c .18/.23 .18/.23 .17/.23
p mn .70/.90  .70/.90 .60/.95
p max 0.035
s 0.04 0.025 0.025
si .15/.35 .15/.35 .15/.35
ni .40/.70 .40/.70 .35/.75
cr .40/.60 .40/.60 .35/.65
mo .15/.25 .15/.25 .15/.25

AISI 8620 Alloy Steel Bar Application

  • Gears
  • Shafts
  • Gears

8620 Cold Drawn Steel Bar Process Services

Case Hardening Normalize Stress Relieve Pickle & Oil Ultrasonic Testing
Straighten & Cut Cold Drawn & Polished Turn, Ground & Polished Eddy Current Testing Shot Blast
Custom Shapes Precision Saw Cutting Machine Straightening Heat Treated Quench and Temper
Grinding Chamfering Annealing Cold Drawing Turn and Polish

8620 Chromoly Steel Quality Certification

Ultrasonic test report Forging ratio
Grain size Heat Treatment Process
Non Metallic Inclusion Surface hardness
Mechanical properties Chemical analysis

8620 Steel Flat Bar as per ASTM A534/ A29/A322/A108, AMS 6274 and E8620

8620 Steel Flat Bar as per ASTM A534

8620 Bar Stock in BQ and AQ (Bearing Quality and Aircraft Quality)
Bearing Quality 8620 Bar

Bearing Quality 8620 Bar

Aircraft Quality 8620 Bar

Aircraft Quality 8620 Bar

SAE 8620H and 8620 Round Bar in -.00″/+.125″ Cut Tolerances
Hot Rolled Round Bar
Diameter (mm) Diameter Tolerance (mm) Diameter (mm) Diameter Tolerance (mm)
≤12.70 -0.13 ~0.30 >50.80~63.5 -0.25~0.76
12.7~25.40 -0.13~0.41 >63.50~76.20 -0.25~1.02
>25.4~38.10 -0.15~0.51 >101.60~ 203.20 -0.38~3.81
>38.1~50.80 -0.20~0.64 – –