Key Takeaways
- 09MnNiDR is a low-alloy steel plate specially used for low-temperature pressure vessels, suitable for impact service at -70°C.
- The nickel addition (0.30-0.80%) maintains mechanical strength and toughness at ultra-low temperatures.
- Typical mechanicals (per GB/T 3531): yield ≥300 MPa, tensile 440-590 MPa, elongation ≥22%, -70°C CVN ≥47 J average / ≥33 J single.
- Delivery condition: normalising or normalising and tempering.
1. Material Description
09MnNiDR is a steel plate material specially used for low-temperature pressure vessels, produced to GB/T 3531.
Steel plates made of this material can withstand low-temperature environments and are especially suitable for pressure vessels and other equipment under low-temperature impact conditions of -70°C.
The main components of the microstructure include ferrite with a small amount of pearlite and/or bainite in the normalised condition.
It is a low-alloy high-strength steel: by adding nickel (Ni), it maintains high mechanical strength and toughness even at ultra-low temperatures, and the fine-grain practice (aluminium addition) further stabilises low-temperature toughness.
2. Typical Chemical Composition (GB/T 3531) of 09MnNiDR Pressure Vessel Steel Plate
| C (max) | Si | Mn | P (max) | S (max) | Ni | Nb (max, optional) | Al (min) |
|---|---|---|---|---|---|---|---|
| 0.12 | 0.15-0.50 | 1.20-1.60 | 0.020 | 0.008 | 0.30-0.80 | 0.04 | 0.020 |
Typical values per the current edition of GB/T 3531; confirm with the COA.
3. Typical Mechanical Properties of 09MnNiDR Pressure Vessel Steel Plate
| Property | Typical value (6-16 mm) |
|---|---|
| Yield strength, ReH (min) | 300 MPa |
| Tensile strength, Rm | 440-590 MPa |
| Elongation, A (min) | 22% |
| Charpy V-notch impact at -70°C (min) | 47 J average of three; 33 J single value |
Typical values; requirements vary with plate thickness - confirm with the standard edition and the order specification.
4. Applications of 09MnNiDR Steel Plate
09MnNiDR steel plate is widely used in the petroleum, chemical and electric-power industries, especially in the manufacture of deethaniser towers, CO2 absorption towers, medium-pressure flash-evaporation towers, coolers, reabsorption towers, compressor casings and propane cryogenic storage tanks. It follows GB/T 3531 for implementation; its heat treatment is usually normalising or normalising and tempering, which gives the required combination of strength and low-temperature toughness.
Frequently Asked Questions
Q1. What temperature is 09MnNiDR designed for?
Low-temperature impact service at -70°C per GB/T 3531.
Q2. What is the tensile strength?
440-590 MPa (typical per GB/T 3531), with yield ≥300 MPa for 6-16 mm.
Q3. What heat treatment is applied?
Normalising or normalising and tempering.
Q4. What role does nickel play?
Nickel (0.30-0.80%) maintains strength and toughness at ultra-low temperatures.
Need a reliable steel plate for -70°C low‑temperature pressure vessel service?
09MnNiDR is purpose‑designed for cryogenic applications such as propane storage tanks, deethaniser towers, and CO₂ absorption columns – and GNEE Steel supplies it in full compliance with GB/T 3531, with normalised or normalised‑and‑tempered delivery, complete mill test certificates, and full impact‑test records at -70°C.
Our technical team can also advise on forming, welding, and post‑weld heat treatment to ensure your fabrication meets the required toughness values.
👉 Send us your required thickness, dimensions, quantity, and delivery port – we'll reply with a competitive firm offer within 4 hours. For first‑time trial orders, we offer free cut samples from our stock so you can verify the -70°C impact performance before you commit to mass production.
Partner with GNEE Steel for your cryogenic pressure‑vessel projects. Contact us now – we're ready to discuss your specifications and certification needs.
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Disclaimer:
The chemical composition, mechanical properties, heat‑treatment conditions, and application examples provided in this article are for general reference only. Actual values may vary depending on plate thickness, manufacturing practice, and the specific edition of GB/T 3531 valid at the time of order. All technical data should be verified against the actual mill test certificates supplied with each delivery. Stock availability, dimensions, and pricing are indicative and subject to prior sale; please confirm current inventory and certification with our sales team.
