March 28, 2024
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09MnNiDR pressure vessel plate performance parameters
1. Introduction to 09MnNiDR steel plate:
09MnNiDR is a type of low-temperature pressure vessel steel plate, executive standard: GB3531.
09MnNiDR: It is a steel plate for low temperature pressure vessels.
"D" is the first letter of low pinyin
"R" is the first letter of Rong Pinyin
2. 09MnNiDR size, shape, weight and allowable deviation
2.1 The size, shape and allowable deviation of the steel plate should comply with the regulations of GB/T709
2.2 The thickness deviation of the steel plate should comply with the Class B deviation requirements of GB/T709. According to the requirements of the buyer, it can also be delivered according to the Class C deviation of GB/T709.
2.3 The steel plate is delivered according to the theoretical weight, and the density of the steel plate used for calculation is 7.85g/cm³.
3. 09MnNiDR delivery status
09MnNiDR delivery status is normalizing or normalizing + tempering, -70 degree low temperature impact
4. Chemical composition of 09MnNiDR
| C | Si | Mn | P | S | Ni | Nb | Alt |
| ≤0.12 | 0.15-0.5 | 1.2-1.6 | ≤0.02 | ≤0.008 | 0.3-0.8 | ≤0.04 | ≥0.02 |
5. Mechanical properties of 09MnNiDR
09The mechanical properties and process performance of MnNiDR should comply with the following table
| Grade | Thickness | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation after Break A (%) | 180° Cold Bay d=3a | Impact Test Temperature and Impact Energy |
| 09MnNiDR | 6-16 | ≥300 | 440-570 | ≥23 | d=2a | -70℃ ≥60 |
| ＞16-36 | ≥280 | 430-560 | d=2a | -70℃ ≥60 | ||
| ＞36-60 | ≥270 | 430-560 | d=2a | -70℃ ≥60 | ||
| ＞60-120 | ≥260 | 420-550 | d=2a | -70℃ ≥60 |
6. 09MnNiDR surface quality
6.1 The surface of the steel plate is not allowed to have defects such as cracks, bubbles, scars, folds and inclusions. If there are any above-mentioned surface defects, cleaning is allowed. The cleaning depth shall be calculated from the actual size of the steel plate and shall not exceed half the thickness tolerance of the steel plate, and the steel plate shall be guaranteed to be The minimum thickness of the steel plate should be smooth and without edges, and the steel plate should not be delaminated.
6.2 Other defects are allowed to exist, and the depth calculated from the actual size of the steel plate shall not exceed half of the thickness tolerance of the steel plate, and it shall be ensured that the thickness of the defective location is not less than the allowable thickness of the steel plate.
