Description
AISI 8620 / SAE 8620 (UNS G86200) Round Bar
What is 8620 Grade ?
AISI 8620 is a Hardenable Chromium, Molybdenum, Nickel Low Alloy Steel often used for carburizing to develop a case hardened part. This case-hardening will result in good wear characteristics. 8620 is commonly used in the engineering and automotive industries for tool holders and other such components.
SAE 8620 steel is a steel hardening and further processing linked to nickel, chromium, and molybdenum giving it better hardenability. The carburizing is used to increase the wear resistance of a core of good mechanical strength and fracture toughness.
8620 is Characterised by good core strength and toughness in small to medium sections with case hardness up to Rc62 when carburized, hardened and tempered.8620 can also be used (uncarburised) as a high tensile steel, which when suitably hardened and tempered can be utilized for various applications requiring good tensile strength and reasonable toughness. Pre hardened and tempered (uncarburized) 8620 can be further surface hardened by nitriding but will not respond satisfactorily to flame or induction hardening due to its low carbon content. 8620 (carburized) is used extensively by all industry sectors for light to medium stressed components and shafts requiring high surface wear resistance with reasonable core strength and impact properties. Typical uses are: Arbors, Bearings, Bushings, Cam Shafts, Differential Pinions, Guide Pins, King Pins, Pistons Pins, Splined Shafts, Ratchets, Sleeves etc
Stockied Sizes :
- • Rounds : 10 mm to 260 mm
- • Bar Finish : Peeled, Turned or Hot Rolled
- • Length : 5 Meter to 6 Meter, Cut Piece, as per cutomer requirement
SAE 8620 Steel Specification and Relevant Standards :
| Country | USA | DIN | BS | BS | Japan |
| Standard | ASTM A29 | DIN 1654 | EN 10084 | BS 970 | JIS G4103 |
| Grades | 8620 | 1.6523/ | 1.6523/ | 805M20 | SNCM220 |
| 21NiCrMo2 | 20NiCrMo2-2 |
| Australia | AS 1444-1996-8620/8620H |
| Germany | W.Nr 1.6523 DIN 21NiCrMo2 |
| Great Britain | BS970: PART 3: 1991 805 M20 |
| BS970: 1955 – EN362 | |
| Japan | JISG 4052 SNCM 220H |
| USA | SAE 8620 AISI 8620 |
| ASTM A29/A29M 1991 8620 | |
| UNS G86200 |
AISI 8620 Chemical Composition :
| Grade | Carbon | Chromium | Manganese | Molybdenum | Nickel | Silicon | Phosphorus | Sulphur |
| C | Cr | Mn | Mo | Ni | Si | P | S | |
| 8620 | 0.18 – 0.23 | 0.40 – 0.60 | 0.70 – 0.90 | 0.15 – 0.25 | 0.40 – 0.70 | 0.15 – 0.35 | 0.040 max | 0.040 max |
ASTM 8620 Steels & Equivalents Chemical Composition :
| Standard | Grade | C | Mn | P | S | Si | Ni | Cr | Mo |
| ASTM A29 | 8620 | 0.18-0.23 | 0.7-0.9 | 0.035 | 0.04 | 0.15-0.35 | 0.4-0.7 | 0.4-0.6 | 0.15-0.25 |
| DIN 1654 | 1.6523/ | 0.17-0.23 | 0.65-0.95 | 0.035 | 0.035 | ≦0.40 | 0.4-0.7 | 0.4-0.7 | 0.15-0.25 |
| 21NiCrMo2 | |||||||||
| EN 10084 | 1.6523/ | 0.17-0.23 | 0.65-0.95 | 0.025 | 0.035 | ≦0.40 | 0.4-0.7 | 0.35-0.70 | 0.15-0.25 |
| 20NiCrMo2-2 | |||||||||
| JIS G4103 | SNCM220 | 0.17-0.23 | 0.6-0.9 | 0.03 | 0.03 | 0.15-0.35 | 0.4-0.7 | 0.4-0.65 | 0.15-0.3 |
| BS 970 | 805M20 | 0.17-0.23 | 0.6-0.95 | 0.04 | 0.05 | 0.1-0.4 | 0.35-0.75 | 0.35-0.65 | 0.15-0.25 |
Applications of AISI 8620 Round Bars & Rods :
In the carburized condition this alloy is used for gears, ring gears, shafts and crankshafts.
Typical applications are: 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.
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