AISI 8620 1.6523 21NiCrMo2 SNCM220 Structure High Nickel Alloy Steel
AISI 8620 Steel | 1.6523 | 21NiCrMo2 | SNCM220 Alloy Steel Round Bar/Structure Steel Round Bar/High Nickel Alloy Steel
1. AISI 8620 Steel Supply Range
8620 Round Bar: diameter 8mm – 3000mm
8620 Steel Plate: thickness 10mm – 1500mm x width 200mm – 3000mm
8620 Square Bar: 20mm – 500mm
8620 tubes are also available against your detailed request.
Surface Finish: Black, Rough Machined, Turned or as per given requirements.
2. 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/ 21NiCrMo2 |
1.6523/ 20NiCrMo2-2 |
805M20 | SNCM220 |
3. ASTM 8620 Steels & Equilvalents 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 | 0.040 | 0.15-0.35 | 0.4-0.7 | 0.4-0.6 | 0.15-0.25 |
| DIN 1654 | 1.6523/ 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 |
| EN 10084 | 1.6523/ 20NiCrMo2-2 |
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 |
| JIS G4103 | SNCM220 | 0.17-0.23 | 0.6-0.9 | 0.030 | 0.030 | 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 | 0.040 | 0.050 | 0.1-0.4 | 0.35-0.75 | 0.35-0.65 | 0.15-0.25 |
4. AISI 8620 Steel Mechanical Properties
- 8620 Physical Properties:
Density (lb / cu. in.) 0.283
Specific Gravity 7.8
Specific Heat (Btu/lb/Deg F – [32-212 Deg F]) 0.1
Melting Point (Deg F) 2600
Thermal Conductivity 26
Mean Coeff Thermal Expansion 6.6
Modulus of Elasticity Tension 31
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