GB 3531 low temperature boiler quality 09MnNiDR pressure vessel steel plate
09MnNiDR steel is low-temperature pressure vessle steel. Since nickel (Ni) is added to the steel, GB 3531 low temperature boiler quality 09MnNiDR pressure vessel steel plate can maintain a relatively high mechanical strength and toughness under ultra-low temperature conditions. And 09MnNiDR steel is mainly used for low temperature pressure vessels.
Mn and Ni are its main alloys. Mn mainly enhances the strength of GB 3531 low temperature boiler quality 09MnNiDR pressure vessel steel plate by solid solution strengthening, while Ni can improve the low temperature toughness of ferrite and has the effect of significantly reducing the temperature of cold and crisp transitions. Its carbon equivalent is less than or equal to 0.44, hardenability tends to be small, and cold cracks are not easily formed. The weld has good plasticity and toughness, and usually does not require preheating. When the GB 3531 low temperature boiler quality 09MnNiDR pressure vessel steel plate thickness exceeds a certain thickness, the rigidity of the joint is restricted, or the carbon equivalent is high, preheating should be considered.
GB 3531 low temperature boiler quality 09MnNiDR pressure vessel steel plate chemical composition (max):
| Grade | C% | SI% | Mn% | Ni% | Mo% | V% | Nb% | Alt% | P%, max | S%, max |
| 09MnNiDR | ≤0.12 | 0.15-0.50 | 1.2-1.6 | 0.30-0.80 | ≤0.040 | ≥0.020 | 0.02 | 0.008 | ||
GB 3531 low temperature boiler quality 09MnNiDR pressure vessel steel plate mechanical property:
| Grade | Thickness, in mm | Tensile Strength | Yield Strength, min | Elongation, %, min |
| 09MnNiDR | 6<T≤16 | 440-570 | 300 | 23 |
| 16<T≤36 | 430-560 | 280 | ||
| 36<T≤60 | 430-560 | 270 | ||
| 60<T≤120 | 420-550 | 260 |
The delivery condition of GB 3531 low temperature boiler quality 09MnNiDR pressure vessel steel plate has several type:
1. Normalized state (Normalized);
2. Normalized and tempered state;
3. Quenched and tempered.
GB 3531 low temperature boiler quality 09MnNiDR pressure vessel steel plate application:
09MnNiDR pressure vessel steel plate is Manganese-Nickel alloy steel, centigrade the letter D is for low temperature using, the letter R is for boiler and pressure vessel using. GB 3531 low temperature boiler quality 09MnNiDR pressure vessel steel plates are used to build boilers and pressure vessels such as petroleum, chemical industry, power plants.
Additional technical services for GB 3531 low temperature boiler quality 09MnNiDR pressure vessel steel plate:
♦ Heat treatment(Normalized,TMCP,Quenched and Tempered,N+T),
♦ Z-test (Z15,Z25,Z35),
♦ Ultrasonic test under GB/T2970,JB4730,EN 10160,ASTM A435,A577,A578
♦ Low temperature impacting test,
♦ DWTT,PWHT (Simulated post-welded heat treatment)
♦ Cutting and welding as per end user’s demands
♦ Rolling under standard NACE MR-0175 (HIC+SSC)
♦ Issued Original Mill test certificate under EN 10204 FORMAT 3.1/3.2
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