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Help CenterEuropean Standard High-strength 36nicrmo16 Alloy Round Steel, 36crnimo4 Alloy Round Bar With Low-temperature Impact Resistance, Cutting
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Core pain points and solutions in the industry
Under harsh working conditions such as petrochemical, shipbuilding, and mining machinery, key structural components often face the dual tests of low-temperature environment and impact load. The brittleness of traditional ordinary alloy steels increases sharply below -20°C, and cold brittle fracture is prone to occur, leading to equipment failure and even safety accidents. At the same time, it is difficult to achieve both high strength and low-temperature toughness. Many materials either meet the strength requirements but have insufficient low-temperature impact energy, or have good toughness but low yield strength. Liaocheng Jincheng Yangming Special Steel Co., Ltd. has been deeply involved in the field of special steel for many years. In response to the above pain points, the company introduced European standard processes to produce 36NiCrMo16 and 36CrNiMo4 series alloy round steels/round bars. By precisely controlling the proportion of elements such as nickel, chromium, and molybdenum, and cooperating with the optimized heat treatment process, the products have excellent low-temperature impact resistance while maintaining high strength, and are especially suitable for extreme operating scenarios from -40°C to -60°C. The company is located in Liaocheng City, Shandong Province, and mainly deals in special materials such as precipitation hardening steels, duplex steels, and heat-resistant steels. Adhering to the business philosophy of seeking truth from facts and being honest and trustworthy, the company has accumulated a good reputation in the industry.
Working mechanism, product features and technical specifications
The strengthening mechanism of this alloy round steel mainly relies on solid solution strengthening and fine grain strengthening. Nickel (Ni) element can significantly improve low-temperature toughness and reduce the ductile-brittle transition temperature. Chromium (Cr) and molybdenum (Mo) form stable carbides with carbon, improving tempering stability and fatigue resistance. The products go through processes such as smelting → forging/rolling → normalizing + tempering or quenching and tempering treatment → precision straightening → non-destructive testing to ensure a uniform internal structure and no cracks.
- Excellent low-temperature impact resistance: The typical longitudinal impact energy (-40°C) is ≥40J, far superior to ordinary alloy steels, meeting the requirements of Arctic drilling, liquefied natural gas equipment, etc.
- High strength grade: The tensile strength can reach 1000～1200MPa, and the yield strength is ≥850MPa, meeting the requirements of heavy-load structural components.
- Good machinability: It supports cutting, turning, drilling, and forging according to drawings. The surface can be provided in black skin, polished or precision-turned states according to requirements.
- Strict dimensional tolerance: The diameter tolerance is in accordance with the DIN EN 10060 standard, the roundness is ≤0.5mm/m, and the length cutting accuracy is ±2mm.
- High material purity:Adopting the electric furnace + external refining process, the sulfur and phosphorus content is ≤0.025%, and the inclusion grade is controlled at ≤2.0.
| Parameter Items | Value/Range |
| Chemical Composition (%) | C:0.32-0.40, Si≤0.40, Mn:0.50-0.80, P≤0.025, S≤0.025, Cr:0.90-1.20, Ni:3.50-4.00, Mo:0.25-0.40 |
| Tensile Strength Rm (MPa) | 1000～1200 |
| Yield Strength Rp0.2 (MPa) | ≥850 |
| Elongation A (%) | ≥12 |
| Reduction of Area Z (%) | ≥45 |
| Impact Energy KV₂ (-40℃)/J | ≥40 |
| Hardness HB | 280～320 |
| Supply Diameter Range (mm) | Φ20～Φ300 |
Trust Endorsement and Company Advantages
Liaocheng Jincheng Yangming Special Steel Co., Ltd. has been stably supplying 36NiCrMo16 and 36CrNiMo4 alloy round steel that meets the DIN EN 10083-3 standard for a long time. The products have been batch - applied in projects such as oil drilling and production, ship shafting, and mine crushers. Customers feedback that the service life of components has been significantly improved under low - temperature working conditions. The company has multiple CNC sawing machines, which can achieve fast cutting and reduce the secondary processing cost for customers. We adhere to the principle of "seeking truth from facts and being honest - based". All products come with material reports, and third - party test reports can be provided. For special working conditions or special - shaped sizes, the engineering team can provide customized solutions. If you are looking for alloy round steel with both high strength and low - temperature toughness, it is recommended that you first provide the operating temperature, stress type, and required size. We will match the most suitable grade and heat - treatment state for you to ensure the optimal balance between performance and cost. Welcome to contact our sales engineers at any time for samples or technical consultations.
FAQ
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Q: What's the difference between 36NiCrMo16 and 36CrNiMo4?
A: Their chemical compositions and mechanical properties are very similar. 36NiCrMo16 is a German DIN standard grade, while 36CrNiMo4 is a new European EN standard grade. The main difference lies in the standards. They can be interchanged in practical applications, and we can supply them according to your needs. -
Q: Can the temperature of the low-temperature impact test for this round steel be lower?
A: The standard impact test temperature is -40℃. However, through optimized heat treatment, the impact energy of some batches can reach ≥27J at -60℃. If a lower temperature is required, it is recommended to use grades with higher Ni content, such as 18Ni maraging steel. But we can also evaluate the feasibility based on your specific requirements. -
Q: Is annealing treatment required after cutting?
A: Generally, cold cutting (band saw) does not produce obvious heat-affected zones, so annealing is not necessary. If flame or plasma cutting is used, stress relief annealing is recommended. We can provide heat treatment services after cutting. -
Q: Can you provide forging and forming processing?
A: Yes. We have supporting forging capabilities and can perform processing such as upsetting, drawing, and die forging on round steel. However, the forging ratio needs to be evaluated based on the finished product size to ensure that the internal streamline structure meets the requirements. -
Q: Do you provide material certificates?
A: Each batch of products comes with test reports of chemical composition and mechanical properties, which can be traced back to the furnace number. Third-party testing is carried out by the institution designated by the customer, and we can cooperate with sampling. -
Q: What is the minimum order quantity?
A: For regular diameters, single-piece orders (about 1 meter) are acceptable. If you need customized non-standard sizes or special heat treatment, it is recommended that the minimum order quantity be over 200kg. The specific quantity can be negotiated. -
Q: Are surface defects allowed on the round steel?
A: According to the DIN EN 10060 standard, slight scale or pits are allowed on the surface, but the depth should not exceed half of the negative diameter tolerance. Any cracks, folds, scabs, etc. are not allowed. We have carried out eddy current or magnetic particle inspection before leaving the factory. -
Q: How to prevent changes in low-temperature performance during transportation?
A: This material is an alloy steel with good hardenability, and its mechanical properties will not change during normal-temperature transportation. However, when transporting in extremely cold regions, it is recommended to use moisture-proof packaging to avoid surface rust, which may affect subsequent processing.
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