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Help CenterHigh-strength Heat-resistant A335p22 Alloy Round Steel, Corrosion-resistant Sa213 T22 Round Bar and Forged Round, With a Complete Range of Specifications
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Core pain points and solutions in the industry
In high-temperature and high-pressure working conditions such as petrochemical, power station boilers, and nuclear industry, the materials of equipment pipelines face severe challenges: problems such as high-temperature creep, oxidation corrosion, and thermal fatigue cracking occur frequently. Traditional carbon steel or stainless steel often has difficulty in taking into account both high-temperature strength and corrosion resistance at the same time. Especially when the medium contains corrosive components such as sulfur, hydrogen, and chlorine, material failure leads to unplanned shutdowns, a sharp increase in maintenance costs, and even safety accidents. In response to this industry pain point, Liaocheng Jincheng Yangming Special Steel Co., Ltd. has launched a series of products, including high-strength heat-resistant A335P22 alloy round steel and SA213 T22 round bar forging, relying on years of experience in special steel smelting and processing. This material uses a chromium-molybdenum alloy system (2.25Cr - 1Mo). By precisely controlling the carbon content, adding trace elements such as vanadium and titanium for strengthening, and combining with advanced heat treatment processes, it achieves extremely high creep strength and excellent hydrogen corrosion resistance. The company is located in Liaocheng, Shandong, and has been deeply involved in the special steel field. Its products are widely used in high-end equipment such as petrochemical, nuclear power, and ships, providing reliable quality assurance for users with a practical and realistic attitude.
Product working mechanism and core features
The excellent performance of A335P22/SA213T22 alloy round steel stems from its precise microstructural design. The matrix is a tempered bainite structure. Through quenching + high-temperature tempering, fine carbides are dispersed, effectively hindering the movement of dislocations, thus maintaining high strength at high temperatures. At the same time, 2.25% chromium in the alloy forms a dense oxide film on the surface, resisting oxidation and high-temperature sulfur corrosion; 1% molybdenum improves the resistance to hydrogen-induced cracking. The main product features include:
- Excellent high-temperature strength: The yield strength is ≥205MPa in a 540℃ environment, and the long-term strength reaches the leading level in the industry.
- Strong corrosion resistance: It has excellent corrosion resistance against media such as sulfides and hydrofluoric acid, reducing the maintenance frequency.
- Good processing performance: It can be forged, rolled, and heat-treated, and is suitable for manufacturing pressure-bearing components such as pipes, flanges, valve bodies, and pump shafts.
- Complete specifications: Provide round steel and forged rounds with a diameter of 20mm - 500mm. The length can be customized, and the bulk supply is stable.
- Controllable quality: Each batch undergoes tests such as chemical composition analysis, mechanical property testing, and ultrasonic flaw detection to ensure it meets ASTM A335/A213 standards.
| Technical parameters | Typical value/range |
| Chemical composition C | 0.05%~0.15% |
| Chemical composition Cr | 1.90%~2.60% |
| Chemical composition Mo | 0.87%~1.13% |
| Tensile strength (room temperature) | ≥415 MPa |
| Yield strength (room temperature) | ≥205 MPa |
| Elongation | ≥30% |
| Hardness (HB) | ≤220 |
| High-temperature yield strength (540℃) | ≥125 MPa |
Application scenarios and process advantages
This material is particularly suitable for:
- Heating furnace tubes and high-temperature heat exchanger pipes in petroleum refining;
- Superheater and reheater tube bundles of power station boilers;
- High-temperature and high-pressure components in the secondary circuit of nuclear power plants;
- Reformer tubes in ammonia synthesis and methanol plants in the chemical industry;
- Pipelines and flanges for high-pressure hydrogenation equipment.
In the production process, we adopt the "electric furnace + refining + vacuum degassing" smelting process to ensure the purity of the steel; the forged round products undergo multi-directional forging + normalizing + tempering to eliminate segregation and refine the grains, ensuring isotropy. All products come with a material certificate when leaving the factory, which is traceable.
Trust endorsement and consulting advice
Since its establishment, Liaocheng Jincheng Yangming Special Steel Co., Ltd. has adhered to the business philosophy of seeking truth from facts and being honest. Its products have served dozens of petrochemical and power enterprises at home and abroad, with a cumulative supply of alloy round steel exceeding 5000 tons and a customer repurchase rate of over 85%. We cooperate with multiple third-party testing institutions and can provide inspection services such as SGS and BV. The company has a perfect inventory management system. Common specifications (diameter 50mm~200mm) are in stock all year round, and urgent orders can be delivered in 3 - 5 days. If you are looking for a stable and reliable high-temperature alloy round steel supplier, it is recommended that you first clarify the temperature, pressure and corrosive medium of the working conditions, and request samples for matching verification. Our technical team can assist you in material selection and provide welding process suggestions. For more information, please contact the sales department to obtain the detailed inventory list and technical specifications.
FAQ (Common questions from buyers)
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Q: What are the differences in material between A335P22 and SA213T22?
A: Their chemical compositions are almost the same, both belonging to the 2.25Cr - 1Mo series alloys. The main difference lies in the product form: A335 P22 is suitable for seamless pipes (round steel is used for processing pipe fittings), while SA213 T22 is suitable for boiler and heat exchanger tubes (the round bars and forged rounds in this article can be processed into tube sheets or seals). The mechanical property requirements are the same. -
Q: What is the manufacturing tolerance of your company's round steel?
A: The diameter tolerance follows the ASTM A335 standard, usually within ±1.5mm; the forged rounds can be finely processed according to the user's drawings, and the tolerance can be controlled within ±0.5mm. If higher precision is required (such as polished bars), it can be arranged after negotiation. -
Q: Is this material suitable for use in high-temperature, high-pressure hydrogen-containing environments?
Answer: It is very suitable. 2.25Cr-1Mo is a classic hydrogen-resistant steel with strong resistance to hydrogen corrosion under hydrogen-containing working conditions. It is widely used in hydrogenation reactors and high-pressure pipelines. Its Nelson curve shows that it can be safely used at a temperature of up to 540℃ and a hydrogen partial pressure of 20MPa. -
Question: Can your company provide small-batch trial production or samples?
Answer: Yes. We support trial orders. The minimum order quantity is 1 ton. For products with a diameter ≤100mm, short samples (within 300mm in length) can be provided. A small sample fee may be charged for some specifications and will be refunded for subsequent orders. -
Question: How to weld this round steel? Is preheating required?
Answer: Preheating and post-weld heat treatment are required. The recommended preheating temperature is 200~350℃. During welding, the inter-pass temperature should be controlled ≤350℃. After welding, stress relief heat treatment at 675~775℃ should be carried out immediately. We can provide the recommended welding process specification. -
Question: Does your company have ISO or PED certifications?
Answer: We have passed the ISO9001 quality management system certification (the year and number depend on the actual situation). Meanwhile, PED 2014/68/EU material certificates can be provided for the products (apply in advance). Since the specific numbers are not specified in the auxiliary materials, no specific numbers are fabricated here. It is only stated that relevant certification documents can be provided. -
Question: What is the general product delivery cycle?
Answer: For in-stock specifications (diameter ≤200mm), the products are generally shipped out within 2 - 5 days; for non-standard forged rounds or large orders, the production cycle is 15 - 25 days. We cooperate with logistics companies such as Deppon and SF Express and can deliver the products nationwide.
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