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8620
Qilu
Product Description
AISI 8620 805M20 Engineering Rolled Alloy Steel
1: AISI 8620 Steel Introduction
AISI 8620 Steel is a low alloy nickel, chromium, molybdenum case hardening steel, generally supplied in the as rolled condition with a maximum hardness HB 255max. SAE steel 8620 offers high external strength and good internal strength, making it highly wear resistant. It has a higher core strength than grades 8615 and 8617. SAE 8620 alloy steel is flexible during hardening treatments, thus enabling improvement of case/core properties. Pre hardened and tempered (uncarburized) 8620 can be further surface hardened by nitriding but this will not respond satisfactorily to flame or induction hardening because of its low carbon content.
8620 Steel Stock in Warehouse
2: AISI 8620 Quality Standard
AISI 8620 steel according to ASTM A29-05.
3: AISI 8620 Steel Equivalent
| Country | China | Japan | Germany | USA | British |
| Standard | GB/T 3077 | JIS G4105 | DIN (W-Nr.) EN 10250 | AISI/ASTM ASTM A29 | BS 970 |
| Grade | 20CrNiMo | SNCM220 | 1.6523/21NiCrMo2 | 8620 | 805M20 |
4: AISI 8620 Steel Chemical Composition
| Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
| 805M20 | 0.17-0.23 | 0.10-0.40 | 0.60-0.90 | 0.030 | 0.030 | 0.35-0.65 | 0.15-0.30 | 0.40-0.70 |
| 8620 | 0.18-0.23 | 0.15-0.35 | 0.70-0.90 | 0.035 | 0.040 | 0.40-0.60 | 0.15-0.25 | 0.40-0.70 |
| 1.6523 | 0.17-0.23 | 0.40 | 0.65-0.95 | 0.035 | 0.035 | 0.40-0.70 | 0.15-0.25 | 0.40-0.70 |
| SNCM220 | 0.17-0.23 | 0.15-0.35 | 0.60-0.90 | 0.030 | 0.030 | 0.40-0.65 | 0.15-0.25 | 0.40-0.70 |
5: AISI 8620 Steel Mechanical Properties
The mechanical properties mainly include tensile strength, yield strength, elongation, area or reduction, hardness, impact value, non-metalic inclusion etc. Different heat treatment will cause different mechanical properties, for example, normalized, tempered, QT. If you want to know the properties, please kindly contact the salesman.
6: AISI 8620 Steel Overviews
Size | Round | Dia 6-1200mm |
Plate/Flat/Block | Thickness | |
Width | ||
Heat treatment | Normalized ; Annealed ; Quenched ; Tempered | |
Surface condition | Black; Peeled; Polished; Machined; Grinded; Turned; Milled | |
Delivery condition | Forged; Hot rolled; Cold drawn | |
Test | Tensile strength, Yield strength, elongation, area of reduction, impact value, hardness, grain size, ultrasonic test, US inspection, magnetic particle testing, etc. | |
Payment terms | T/T;L/C;/Money gram/ Paypal | |
Trade terms | FOB; CIF; C&F; etc.. | |
Delivery time | 30-45 days | |
7: AISI 8620 Steel Application
8620 alloy steel are used for Arbors, Bearings, Bushings, Cam Shafts, Differential Pinions, Guide Pins, King Pins, Pistons Pins, Gears, Splined Shafts, Ratchets, Sleeves and other applications where it is helpful to have a steel that can be readily machined and carburized to controlled case depths.
8: AISI 8620 Steel Heat Treatment
Annealing
ASTM 8620 steel may be given a full anneal by heat to 820℃ – 850℃, and hold until temperature is uniform throughout the section and cool in furnace or air cooled.
Tempering
Tempering of heat treated and water quenched parts of 8620 steels (not carburized) is done at 400 F to 1300 F to improve case toughness with minimal effect on its hardness. This will also reduce the possibility of grinding cracks.
Hardening
The ASTM steel 8620 will be austenitized at around 840°C – 870°C, and oil or water quenched depending upon section size and intricacy. Cool in Air or Oil required.
Normalizing
1675oF (910oC) and air cool. This is another method of improving machinability in 8620 material; normalizing might also be used prior to case hardening.
9: AISI 8620 Steel Tolerance
Diameter(mm) | Tolerance | ||
Forged Steel Round Bar | 80-600 | Black Surface:0~+5 | Rough Machined or Turned:0~+3 |
650-1200 | Black Surface:0~+15 | Rough Machined or Turned:0~+3 | |
Hot Rolled Steel Round Bar | 16-310 | Black Surface:0~+1 | Peeled:H11 |
Cold Drawn Steel Round Bar | 6-100 | Black Surface:H11 | Peeled:H11 |
10: Delivery Condition
For hot forged or hot rolled bar, usually the delivery condition is hot forged or rolled, annealed or QT, black surface or rough turned.
For hot forged plate, usually the delivery condition is hot forged, annealed or QT, milled surface.
For hot rolled plate, usually the delivery condition is hot rolled, annealed or QT, black surface.
