21NiCrMo2 Alloy steel 1.6523 material
Description
21NiCrMo2 Alloy steel is a hardenable chromium, molybdenum, nickel low alloy steel more often used for carbonizing to advance a case-hardened phase. This case-hardening will influence in just right wear traits. This Grade is in most cases used for gears, ring gears, shafts, and crankshafts.
It 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.
21NiCrMo2 Alloy steel Supply Range
Round Bar: diameter 8mm – 3000mm
Steel Plate: thickness 10mm – 1500mm x width 200mm – 3000mm
Square Bar: 20mm – 500mm
Tubes are also available against your detailed request.
Surface Finish: Black, Rough Machined, Turned or as per given requirements.
21NiCrMo2 Alloy steel Chemical Composition
| Grade | C | Mn | P | S | Si | Ni | Cr | Mo |
| 21NiCrMo2 | 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 Alloy steel Relevant Standards
| Country | USA | DIN | BS | BS | Japan |
| Standard | ASTM A29 | DIN 1654 | EN 10084 | BS 970 | JIS G4103 |
| Grades | 8620 | 1.6523/21NiCrMo2 | 1.6523/20NiCrMo2-2 | 805M20 | SNCM220 |
Heat Treatment
1.Annealing
21NiCrMo2 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.
2.Tempering
Tempering of heat treated and water quenched parts of 21NiCrMo2 steel (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.
3.Hardening
21NiCrMo2 steel 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.
4.Normalizing
1675ºF (910ºC) and air cool. This is another method of improving machinability in 21NiCrMo2 steel material; normalizing might also be used prior to the case hardening.
Application
It 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 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.
Contact
If you have any 21NiCrMo2 Alloy steel inquiries and questions for Price, Application, hot treatment, Please don’t hesitate to contact us.
Email: Jack@otaisteel.com
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