Contact Platform Support
Help CenterAlloy Carburizing Steel 20crni3a Round Steel, American Standard High-quality A42202 Quenched and Tempered Round Steel, 14 - 600 Cutting
Related Products
-
German Standard X3crnimo13-4 Stainless Steel Round Bar, Low-carbon Super Martensitic 1.4313 Stainless Steel Round Rod, CuttingUS$ 11.08 - 12MOQ: 10 Kilograms -
Non-magnetic Constant Expansion Porcelain 4j80 Alloy Rod, 4j80 Soft Magnetic Alloy Round Steel, Non-standard Customization, Quality Guaranteed, Cutting for RetailUS$ 18.46 - 20.77MOQ: 10 Kilograms
-
American Standard Austenitic Uns S30815 Stainless Steel Round Bar, Heat-resistant 253ma Stainless Steel Bar, Guaranteed for Flaw Detection, Cutting and Retail SalesUS$ 13.5 - 15.5MOQ: 10 Kilograms
-
National Standard Precipitation Hardening 0cr13ni8mo2al Stainless Steel Bar, High-strength Bar Stock, In-stock Cutting, SpectroscopyUS$ 11.5 - 12MOQ: 10 Kilograms
-
4j32 Invar Alloy Rod, Refined Steel Furnace Vacuum Solution Material, 1j22 Cobalt-vanadium Soft Magnetic Alloy Round Steel, Customized Polished Round BarUS$ 8 - 10MOQ: 10 Kilograms
Industry pain points and our solutions: In the fields of high-end machinery manufacturing and heavy industry, transmission components and structural parts have long faced core pain points such as insufficient carburized layer hardness, poor core toughness, large heat treatment deformation, and short fatigue life. Especially under harsh working conditions in industries such as oil, chemical, and shipbuilding, ordinary carbon steel or low-alloy steel can hardly meet the dual requirements of surface wear resistance and core impact resistance simultaneously. In response to this key bottleneck, Liaocheng Jincheng Yangming Special Steel Co., Ltd. relies on more than a decade of experience in supplying special steel. It carefully selects Alloy carburizing steel 20CrNi3A round steel and significantly improves the comprehensive mechanical properties of the material by precisely controlling the alloy ratio and quenching and tempering process. Our products are manufactured according to the American standard high-quality A42202, ensuring the stability of the composition from the source. Combined with the full-specification cutting service of 14 - 600mm, it effectively solves practical problems for customers such as "small batches with diverse specifications" and "no reduction in performance after cutting", achieving cost reduction and efficiency improvement.
Product working principle and core features: 20CrNi3A belongs to nickel-chromium alloy carburizing steel. Its design concept is to balance surface hardness and core toughness through the microstructure of low-carbon martensite + dispersed carbides. After carburizing and quenching, a high-carbon martensite layer is formed on the surface (with a hardness of up to 58 - 62 HRC), while the core maintains good toughness and plasticity due to the presence of nickel and chromium elements (impact energy at -40℃ ≥ 60J). Quenching and tempering treatment (quenching + high-temperature tempering) further refines the grains, eliminates internal stress, and enables the material to obtain a uniform sorbite structure. The main working features include:
- Excellent carburizing performance: The carbides are evenly distributed, not prone to form networks or large blocks, and the depth of the carburized layer is controllable (0.8 - 2.0mm);
- High hardenability: It can be fully hardened by air cooling, especially suitable for large-section (≤Ф200mm) parts, reducing the risk of quenching cracking;li>
- Good machinability: The hardness is moderate in the quenched and tempered state (about HB 250 - 320), facilitating turning, drilling, and milling;
- Stable dimensional accuracy: The round steel is inspected by flaw detection and straightened, and the diameter tolerance can reach the h11 level. The length can be cut to the customer's specified size (14 - 600mm cutting);
- Diverse surface conditions: Offer surfaces such as black skin, peeled, and polished to meet the requirements of different processes.
Technical specification reference: The following are the typical parameters of 20CrNi3A round steel in the quenched and tempered state (for reference only, and the specific ones shall be subject to the quality assurance certificate of each batch):
| Chemical composition (%) | C: 0.17-0.23, Si: 0.15-0.35, Mn: 0.30-0.60, Cr: 0.60-1.00, Ni: 3.00-3.50 |
| Tensile strength (MPa) | ≥930 (quenched and tempered state) |
| Yield strength (MPa) | ≥685 |
| Elongation (%) | ≥12 |
| Impact energy (J) at -40℃ | ≥60 |
| Carburized layer depth (mm) | 0.8-2.0 (customizable) |
| Supply specification range | Diameter 14-600mm, length cut as required |
In addition, we can also provide additional services such as ultrasonic flaw detection, normalizing, annealing, and isothermal normalizing according to customer requirements to ensure that there are no internal defects such as cracks and shrinkage holes in the material.
Trust endorsement and company advantages: Liaocheng Jincheng Yangming Special Steel Co., Ltd. has been focusing on the special steel field for a long time. It mainly deals in high - end materials such as precipitation - hardening steel, duplex steel, heat - resistant alloy, austenitic steel, and martensitic steel. Its products are widely used in industries such as petroleum, chemical, shipbuilding, nuclear engineering, aerospace, mining, textile, and construction machinery. The company always adheres to the business philosophy of seeking truth from facts and being honest and has accumulated a good reputation among customers. We are equipped with direct - reading spectrometers, universal testing machines, impact testing machines, and ultrasonic flaw detectorsTesting equipment, etc. Each batch of materials can provide original factory quality assurance certificates. For 20CrNi3A round steel, we always have more than a hundred tons of spot inventory with diameters ranging from 14 to 600mm. We support cutting for retail and customized length processing, and the goods can be shipped within 24 hours at the fastest. We deeply understand that the stability of the materials is directly related to the safety and service life of your products. Therefore, the whole process from steelmaking to rolling is traceable.
Professional advice and contact information: If you are looking for round steel materials that can meet high wear resistance, high toughness, and good carburizing performance, it is recommended that you first clarify the final heat treatment requirements of the parts (such as carburized layer depth, surface hardness, core hardness, etc.) and inform us of the specific machining allowance. Our technical team can assist you in confirming pre - quenched and tempered or direct carburizing schemes and provide small sample cutting test services. You are welcome to contact us at any time to request detailed chemical composition and mechanical property reports, or directly visit our factory for inspection. Let's jointly overcome technical difficulties with solid quality and enhance product competitiveness.
FAQ - Answers to common questions from professional buyers
Q1: What are the differences in carburizing performance between 20CrNi3A and 12Cr2Ni4A?
A1: The upper limit of carbon content in 20CrNi3A is slightly higher (0.23% vs 0.17%). After carburizing, the surface carbon concentration control is more stable, and the core impact toughness is slightly better than that of 12Cr2Ni4A, but the carburizing speed is slightly slower. Both belong to high - hardenability steels. The choice needs to be determined according to the part cross - sectional size and core hardness requirements.
Q2: Can your company's 20CrNi3A round steel be provided in the normalized state instead of the quenched and tempered state?
A2: Yes. We can supply the steel in the normalized, annealed, or quenched and tempered states according to customer requirements. The hardness of the normalized state is relatively low (about HB 180 - 220), which is beneficial for subsequent cold processing; the quenched and tempered state has better comprehensive mechanical properties and is suitable for direct use. It is recommended to indicate the required state in the order.
Q3: Does the end face of the round steel after cutting need to be deburred?
A3: There are usually a small amount of burrs left in standard cutting. If the customer requests, we can provide deburring or chamfering services at an additional cost. Simple grinding will be carried out before conventional logistics to avoid scratches.
Q4: Is the 14mm small - diameter round steel suitable for manufacturing small gears?
A4: The 20CrNi3A round steel with a specification of 14mm is completely suitable for manufacturing shaft and gear parts. The rolling structure of small - diameter steel is more uniform. After carburizing and quenching, the surface hardness can reach above 58HRC, and the core toughness meets the fatigue requirements. It is the preferred choice for precision small - sized transmission parts.
Q5: What inspection items are included in your company's factory quality assurance certificate?
A5: Each batch of products is accompanied by chemical composition analysis, tensile test (Rm, ReL, A), impact test (KV2), hardness test, ultrasonic flaw detection (if required), etc., which comply with GB/T 3077 and ASTM A322 standards. If customers need third-party testing, we can cooperate with sample collection.
Q6: Is there a big price difference between the black skin and polished 20CrNi3A round steel of the same diameter?
A6: The polished material needs to go through processes such as peeling, straightening, and polishing, which increases the cost by about 8%-15%. The surface roughness Ra of the polished material is ≤1.6μm, and the dimensional accuracy is higher, which is suitable for parts with small finishing allowances. The black skin material is more economical in price and is suitable for blank cutting. It is recommended to choose according to the actual process.
Q7: Can your company provide small batch orders with mixed specifications?
A7: Absolutely. We support the mixing of different diameters (such as 20mm, 30mm, 50mm) or different lengths of fixed-length cutting within the same batch. The minimum order quantity can be as low as a single piece. Please provide a specific list, and we will quote according to the actual total weight.
Q8: How is the corrosion resistance of 20CrNi3A round steel in the petrochemical environment?
A8: 20CrNi3A belongs to low-alloy steel and does not have the corrosion resistance of stainless steel. In an environment containing hydrogen sulfide or chloride ions, it is recommended to use surface plating or composite coating for protection. Corrosion-resistant materials such as duplex stainless steel can also be selected. If there is a corrosion condition, welcome to consult our company's corrosion-resistant alloy products.
Send Inquiry to This Supplier
You May Also Like
-
Low-alloy High-strength A694 F52 Duplex Stainless Steel Round Bar, American Standard S32950 Steel Ingot, Forged RingUS$ 9.85 - 10.15MOQ: 10 Kilograms
-
13crmo44 Round Steel Resistant to High-temperature Creep, 13crmo4-5/1.7335 Structural Round Bar Resistant to Hydrogen-containing Corrosion, CuttingUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
High-strength 40crni2si2mova Round Steel Forgings, 40crni2si2mov Round Bars With Diameters Ranging From 14 to 400 Are AvailableUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
Carburized Heat-resistant Structural Steel 20crni4wmova Round Steel, 18crni5mo Alloy Steel Bar With Low-temperature ToughnessUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
Round Steel for German Standard Power Station Steam Turbine 26nicrmo14-6, European Standard Rotor Bolt 1.6958 Alloy Round BarUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
Xingcheng Tl4227 Alloy Structural Round Steel, Skf3 Quenched and Tempered Alloy Round Bar for Automobiles, Quality Guaranteed, Delivered to FactoryUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
Free-cutting Steel Sae1117, 1118 Round Steel, 1215ms Round Bar, Cold-drawn Bright Round With Diameters Ranging From 6 to 220, Complete SpecificationsUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
Internal Combustion Engine Valve Steel 61cr21mn10mo1v1nb1n High-temperature Oxidation and Corrosion-resistant Stainless Steel Round Bar, CustomizableUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
20crmovtib4-10 Alloy Structural Steel Bars for High-strength Bolt Fasteners, 1.7729 Round Steel ForgingsUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
Heat-resistant 45cr14ni14w2mo Stainless Steel Ingot, Corrosion-resistant S32590 Bright Round Bar, 40cr14ni14w2mo Round SteelUS$ 1.46 - 1.77MOQ: 10 Kilograms
