1.3816, X8CrMnN18-18, ASTM A289
1.3816, X8CrMnN18-18, ASTM A289 Nonmagnetic retaining rings for 50MW-200MW power generator, acc. to ASTM A289, SEW 390
Chemical Composition
| Grade | Chemical composition WT % | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Cr | Ni | N | Ti | V | Al | |
| ASTM A289 | 0.10 | 0.8 | 17.5-20 | 0.06 | 0.015 | 17.5-20 | 2.00 | 0.45-0.80 | 0.10 | 0.25 | 0.04 |
| 1.3816, X8CrMnN18-18 | 0.12 | 1.0 | 17.5-20 | 0.06 | 0.03 | 17.5-20 | 1.00 | 0.40-0.70 | |||
Mechanical Properties
Mechanical properties acc. to ASTM A289/A289M
- Grade 1
- Tensile strength ksi/MPa: min 145/1000
- 0.2% Offset Yield Strength Psi/MPa: Min 135/930
- Elongation in 2 in. or 50mm, min 28%
- Reduction of Area, min 60%
- Charpy V-Notch Energy, min. ft/lb/J: 70/95
- Grade 2
- Tensile strength ksi/MPa: min 155/1070
- 0.2% Offset Yield Strength Psi/MPa: Min 145/1000
- Elongation in 2 in. or 50mm, min 25%
- Reduction of Area, min 55%
- Charpy V-Notch Energy, min. ft/lb/J: 65/88
- Grade 3
- Tensile strength ksi/MPa: min 165/1140
- 0.2% Offset Yield Strength Psi/MPa: Min 160/1105
- Elongation in 2 in. or 50mm, min 20%
- Reduction of Area, min 50%
- Charpy V-Notch Energy, min. ft/lb/J: 60/81
- Grade 4
- Tensile strength ksi/MPa: min 170/1170
- 0.2% Offset Yield Strength Psi/MPa: Min 165/1140
- Elongation in 2 in. or 50mm, min 19%
- Reduction of Area, min 48%
- Charpy V-Notch Energy, min. ft/lb/J: 58/79
- Grade 5
- Tensile strength ksi/MPa: min 175/1205
- 0.2% Offset Yield Strength Psi/MPa: Min 170/1170
- Elongation in 2 in. or 50mm, min 17%
- Reduction of Area, min 45%
- Charpy V-Notch Energy, min. ft/lb/J: 55/75
- Grade 6
- Tensile strength ksi/MPa: min 185/1275
- 0.2% Offset Yield Strength Psi/MPa: Min 180/1240
- Elongation in 2 in. or 50mm, min 14%
- Reduction of Area, min 40%
- Charpy V-Notch Energy, min. ft/lb/J: 50/68
- Grade 7
- Tensile strength ksi/MPa: min 195/1345
- 0.2% Offset Yield Strength Psi/MPa: Min 190/1310
- Elongation in 2 in. or 50mm, min 12%
- Reduction of Area, min 35%
- Charpy V-Notch Energy, min. ft/lb/J: 40/54
- Grade 8
- Tensile strength ksi/MPa: min 200/1380
- 0.2% Offset Yield Strength Psi/MPa: Min 195/1345
- Elongation in 2 in. or 50mm, min 10%
- Reduction of Area, min 30%
- Charpy V-Notch Energy, min. ft/lb/J: 35/47
Physical Properties
- Modulus of elasticity [103 x N/mm2]: 195
- Density [g/cm3]: 7.70
Coefficient of Linear Thermal Expansion 10-6 oC-1
| 20-100oC | 20-200oC | 20-300oC | 20-400oC |
|---|---|---|---|
| 16.0 | 17.10 | 17.90 | 18.70 |
Heat Treatment
Solution Heat Treatment
Harden from a temperature of 1020-1120oC followed by water or air quenching.
Forging
Hot forming temperature: 1150-950oC.
Thermal Properties
Welding Properties
Machining Properties
Similar or Equivalents Steel Grade
1.3816, X8CrMnN18-18, ASTM A289 Grade 3, P900
1.3816, X8CrMnN18-18, ASTM A289 Non-magnetic Steel stock list
| Grade | Shape | Dimension mm | Qty. kg |
|---|---|---|---|
| 1.3813 X40MnCrN19 | Round | Φ48 | 895 |
| 1.3813 X40MnCrN19 | Round bar | Φ42 | 623 |