Alleima® 8R61 is an austenitic chromium-nickel steel alloyed with molybdenum for high-temperature applications.
Standards
- EN Number: 1.4918
- EN Name: X6CrNiMo17-13-2
- W.Nr.: X 6 CrNiMo 17 13
- DIN: 1.4919
Product standards
Seamless tube and pipe:
- EN 10216-5
- DIN 17459
Chemical composition (nominal)
| C | Si | Mn | P | S | Cr | Ni | Mo |
|---|---|---|---|---|---|---|---|
| 0.06 | 0.5 | 1.4 | ≤0.035 | ≤0.015 | 17.5 | 12 | 2.2 |
Mechanical properties
At 20°C (68°F)
| Proof strength | Tensile strength | Elong. | ||
|---|---|---|---|---|
| Rp0.2a) | Rm | Ab) | ||
| MPa | ksi | MPa | ksi | % |
| ≥205 | ≥30 | 490-690 | 71-100 | ≥35 |
1 MPa = 1 N/mm2
a) Rp0.2 and Rp1.0 correspond to 0.2% offset and 1.0% offset yield strength, respectively.
b) longitudinal
At high temperatures
|
Temperature
|
Proof strength
|
|---|---|
| Rp0.2 | |
| °C | MPa |
| min. | |
| 50 | 184 |
| 100 | 177 |
| 150 | 162 |
| 200 | 147 |
| 250 | 137 |
| 300 | 127 |
| 350 | 122 |
| 400 | 118 |
| 450 | 113 |
| 500 | 108 |
| 550 | 103 |
| Temperature | 10000h | 100000h | |||
|---|---|---|---|---|---|
| °C | °F | MPa approx. | ksi approx. | MPa approx. | ksi approx. |
| 550 | 1020 | 250 | 36.3 | 175 | 25.4 |
| 560 | 1040 | 235 | 34.1 | 164 | 23.8 |
| 570 | 1058 | 220 | 31.9 | 153 | 22.2 |
| 580 | 1076 | 205 | 19.7 | 142 | 20.6 |
| 590 | 1094 | 190 | 27.6 | 131 | 19.0 |
| 600 | 1112 | 175 | 25.4 | 120 | 17.4 |
| 610 | 1130 | 160 | 23.2 | 109 | 15.8 |
| 620 | 1148 | 147 | 21.3 | 98 | 14.2 |
| 630 | 1166 | 135 | 19.6 | 88 | 12.8 |
| 640 | 1184 | 123 | 17.8 | 78 | 11.3 |
| 650 | 1202 | 111 | 16.1 | 69 | 10.0 |
| 660 | 1220 | 100 | 14.5 | 60 | 8.7 |
| 670 | 1238 | 91 | 13.2 | 52 | 7.5 |
| 680 | 1256 | 82 | 11.9 | 46 | 6.7 |
| 690 | 1274 | 73 | 10.6 | 40 | 5.8 |
| 700 | 1292 | 65 | 9.4 | 34 | 4.9 |
Welding
The weldability of Alleima® 8R61 is good. Welding must be carried out without preheating and subsequent heat treatment is normally not required. Suitable methods of fusion welding are manual metal-arc welding (MMA/SMAW) and gas-shielded arc welding, with the TIG/GTAW method as first choice.
For Alleima® 8R61, heat input of <2.0 kJ/mm and interpass temperature of <150°C (300°F) are recommended.
Recommended filler metals
TIG/GTAW or MIG/GMAW welding
ISO 14343 S 19 12 3 H / AWS A5.9 ER316H
MMA/SMAW welding
ISO 3581 E 19 12 2 R / AWS A5.4 E316H-17
Disclaimer: Recommendations are for guidance only, and the suitability of a material for a specific application can be confirmed only when we know the actual service conditions. Continuous development may necessitate changes in technical data without notice. This datasheet is only valid for Alleima materials.