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Help CenterNational Standard Precipitation Hardening 0cr13ni8mo2al Stainless Steel Bar, High-strength Bar Stock, In-stock Cutting, Spectroscopy
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Core pain points in the industry and the company's solutions
In high - end manufacturing fields such as petrochemical, aerospace, nuclear engineering and marine engineering, key components often face extreme working conditions of high temperature, high pressure, corrosion and alternating loads. Ordinary stainless steels (such as 304 and 316) are corrosion - resistant, but their strength is limited. They are prone to plastic deformation or fatigue failure under heavy - load or high - stress environments. While traditional high - strength steels have insufficient corrosion resistance, and their surfaces are prone to rust, which affects the service life and safety of equipment. The industry has long been longing for a metal material that combines high strength (≥1200MPa) and good corrosion resistance. Precipitation - hardening stainless steel can achieve an excellent balance between strength and toughness by precipitating strengthening phases through solution and aging heat treatment. However, there are pain points in the domestic market, such as large composition fluctuations, unclear heat treatment processes, and long supply cycles. Especially for the high - end grade '0Cr13Ni8Mo2Al', users often worry about the quality stability due to the insufficient qualifications of suppliers.
Liaocheng Jincheng Yangming Special Steel Co., Ltd. (located in Liaocheng, Shandong, focusing on the wholesale industry) relies on years of experience in special steel business. It selects high - quality raw materials and strictly implements the GB/T 1220 national standard, and launches the national standard precipitation - hardening 0Cr13Ni8Mo2Al stainless steel bar. We are equipped with a spectrometer for double - detection of incoming and outgoing materials to ensure that the chemical composition is precisely controlled within the standard range. At the same time, we provide reference for heat treatment parameters to assist customers in optimizing the aging process and maximizing the performance of the material. There is sufficient stock of bar materials, and on - demand sawing is supported, which avoids the waste of self - processing by customers and solves the three major pain points of 'unreliable composition, difficult - to - control process, and slow delivery' from the source.
Working mechanism and product features
Working mechanism: 0Cr13Ni8Mo2Al belongs to martensite + precipitation - hardening stainless steel. Its strengthening process is divided into two steps: First, a complete solution treatment is carried out at about 1040℃ to fully dissolve carbides and nitrides and form a uniform austenite structure. Then, fine lath martensite is obtained through quenching. Finally, aging treatment is carried out at 520 - 560℃ to precipitate metastable NiAl intermetallic compound particles. These nano - scale precipitated phases are uniformly distributed on the martensite matrix, effectively hindering the movement of dislocations, thus obtaining high strength and good toughness.
- High - strength characteristics: After aging, the tensile strength can reach ≥1300MPa, the yield strength is ≥1180MPa, and the hardness is HRC 38 - 45, which is far superior to austenitic stainless steel.
- Excellent corrosion resistance: With a chromium content of 13% and the provision of molybdenum and aluminum elements, it has good corrosion resistance in reducing acid and seawater environments, which is superior to martensitic stainless steel of the same strength.
- Processing and Welding Performance: In the solution state, the hardness is moderate (≤HRB 100), and conventional machining such as turning, milling, and drilling can be carried out; reliable connection can be achieved by controlling welding parameters and post-weld heat treatment.
- Size and Surface Flexibility: Bar stocks with a diameter of Φ10-300mm are provided. The surface can be selected in black skin, ground, or turned states to meet different machining allowance requirements.
- On-site Cutting and Quick Response: The commonly used specifications are always in stock, and the products can be sold from 0.5 meters. They can be sold as a whole or precisely sawed to reduce the customer's inventory cost.
Technical Specifications (Typical Values, in line with GB/T 1220)
| Item | Parameter |
| Chemical Composition (wt%) | C ≤0.05; Cr 12.0-14.0; Ni 7.5-8.5; Mo 2.0-2.5; Al 0.8-1.2 |
| Tensile Strength (Rm) | ≥1300 MPa (Typical Value 1350-1550 MPa) |
| Yield Strength (Rp0.2) | ≥1180 MPa (Typical Value 1200-1400 MPa) |
| Elongation (A) | ≥10% (Typical Value 12-15%) |
| Hardness | HRC 38-45 (Aging State); HB ≤269 (Solution State) |
| Density | Approximately 7.75 g/cm³ |
| Delivery State | Solution + Aging (or Solution State, as required by the customer) |
| Implementation Standard | GB/T 1220-2007 |
Detailed Product Advantages:
- Strict composition control: For each batch, a direct-reading spectrometer is used to detect the main elements (Cr, Ni, Mo, Al, etc.) to ensure that they do not exceed the upper and lower limits of the national standard, and to avoid performance fluctuations caused by segregation or inclusions.
- Direct supply and cost-effectiveness: As a wholesale enterprise, we simplify the channels and eliminate intermediate markups, providing customers with competitive prices, which is especially suitable for bulk purchases.
- Technical assistance: We can recommend the best aging temperature (520 - 560℃) and holding time (1 - 4h) according to the customer's final use temperature and impact requirements, shortening the user's trial production cycle.
- Complete quality inspection process: The appearance dimensions (diameter tolerance h9 - h11) and surface defects (cracks, folds) of each bar are inspected one by one, and a material certificate is provided.
Trust endorsement and company advantages
Since its establishment, Liaocheng Jincheng Yangming Special Steel Co., Ltd. has always adhered to the business philosophy of "seeking truth from facts and honesty as the foundation", and has accumulated a good reputation in the special steel circle. Our precipitation-hardening steel products have been successfully applied in scenarios such as oil drilling tools (e.g., valves, pump shafts), aerospace structural parts (long-life springs, fasteners), and chemical equipment (acid-resistant pump impellers). We understand the importance that customers attach to material stability and traceability. Therefore, the furnace number of each bar can be traced, and spare samples are retained for three months to facilitate customers' re-inspection. Regarding the delivery commitment, the stock of regular sizes can be shipped within 1 working day, and the cut-to-length products can be delivered within 48 hours. What we provide is not only materials but also performance guarantees.
Consultation service advice: If you are looking for a high-strength, corrosion-resistant, and weldable stainless steel bar, 0Cr13Ni8Mo2Al is a grade worthy of serious consideration. We suggest that you provide specific operating condition parameters (temperature, medium, stress state) so that we can assist in confirming the heat treatment state and surface requirements. Welcome to call or contact us online. Our technical sales can provide you with selection references, free cutting quotes, and logistics solutions to help the project progress smoothly.
FAQ - Answers to common professional questions
1. What are the main advantages of 0Cr13Ni8Mo2Al compared with ordinary 304 stainless steel?
Answer: 304 is an austenitic stainless steel. After solution treatment, its strength is about 550MPa, while the strength of 0Cr13Ni8Mo2Al after aging can reach over 1300MPa, more than twice that of 304. At the same time, it contains molybdenum and aluminum, and its pitting corrosion resistance is better than that of 304, especially suitable for high-stress corrosion environments. However, the cost is also higher, and a trade-off needs to be made according to the operating conditions.
2. Is the heat treatment process of this material complex? Can you provide reference parameters?
Answer: The process is relatively simple: solution treatment at 1040°C with rapid cooling, and aging at 520 - 560°C with air cooling. We can provide the recommended aging temperature and time range for each batch. Customers only need to control the equipment accuracy to obtain stable performance.
3. What diameters and lengths of bar stock are available in stock?
Answer: We usually stock bars with diameters from Φ10 to Φ300mm, and the length is generally fixed at 3 - 6 meters. They can also be cut into any short lengths as required (e.g., starting from 0.5 meters). The saw-cut surface is flat, with a dimensional accuracy of ±1mm.
4. Does the material come with a material certificate when leaving the factory? Can third-party spectral re-inspection be done?
Answer: Each batch of bars comes with a material certificate issued according to GB/T 1220, including chemical composition and mechanical properties. We also accept on-site spectral testing by customers or testing entrusted to third parties to ensure the data is true and reliable.
5. How is the welding performance of this stainless steel? Is heat treatment required after welding?
Answer: It has good weldability. TIG welding or laser welding can be used, and it is recommended to use homogeneous welding wire or ERNiCr - 3 as the filler material. After welding, it is recommended to conduct solution or aging treatment to restore the strength, and specific guidance can be provided for the plan.
6. Can 0Cr13Ni8Mo2Al be used in high - temperature environments above 400°C?
Answer: The long - term service temperature of this material generally does not exceed 350°C. At high temperatures, the precipitated phase will coarsen, leading to a decrease in strength. If higher temperatures are required, iron - based or nickel - based alloys can be considered. It is recommended to consult our technical staff for model selection.
7. What is the approximate delivery cycle? Is there a price discount for bulk purchases?
Answer: For common specifications (≤φ100mm), the stock can be shipped on the same day, and it takes 1 - 2 days for fixed - length cutting. For bulk purchases (≥2 tons), step - by - step discounts are available. Please inform the size and quantity when inquiring about the price.
8. What are the allowable defect standards for the surface of this bar?
Answer: According to GB/T 1220, the surface of the bar shall not have defects such as cracks, folds, and scabs. Local slight scratches or pits are allowed, with a depth not exceeding the diameter tolerance. The surface roughness Ra of the ground surface is ≤3.2μm.
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