Contact Platform Support
Help CenterInternal Combustion Engine Valve Steel 61cr21mn10mo1v1nb1n High-temperature Oxidation and Corrosion-resistant Stainless Steel Round Bar, Customizable
Related Products
-
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
-
Alloy Tool Steel 5crw2si Round Steel, 4crw2si Tool Steel Bars, Long Steel With Diameters From 16 to 200 and Complete SpecificationsUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
Mold Steel H13r Round Steel, Heat-resistant H13esr Electroslag Round Bar, Can be Cut and Sold Retail From 16 to 600, Guaranteed for Flaw DetectionUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
National Standard High-quality Carbon Tool Steel T10a Round Steel, T8a Round Bar. High Hardness and Good Wear Resistance. Available in Sizes From 14 to 280mm.US$ 1.46 - 1.77MOQ: 10 Kilograms
Core pain points and solutions in the industry
In modern internal combustion engines (such as diesel engines, gasoline engines, and gas engines), exhaust valves are long - term exposed to harsh working conditions of high temperature, high pressure, and sulfur - and oxygen - containing environments. Traditional valve materials (such as 4Cr9Si2, 5Cr21Mn9Ni4N, etc.) are prone to problems such as oxide scale spalling, high - temperature corrosion pits, and fatigue cracking above 900℃. These problems not only lead to valve stem jamming and sealing failure but also directly affect engine power and emission compliance. Therefore, the research and development of high - performance valve steel has become an urgent need in the industry.
Liaocheng Jincheng Yangming Special Steel Co., Ltd., relying on the mature steel processing industrial chain in Liaocheng, Shandong, focuses on the production and customized services of special steel. In response to the above - mentioned pain points, the 61Cr21Mn10Mo1V1Nb1N valve steel round bar we launched has significantly improved the high - temperature oxidation resistance and corrosion resistance while ensuring thermal strength by optimizing the alloy ratio - adding strengthening elements such as Mo, V, Nb, N. This material has been widely used in fields such as construction machinery, marine engines, and petrochemical pump valves, effectively extending the service life of valves by more than 30%.
Product working mechanism and technical features
61Cr21Mn10Mo1V1Nb1N belongs to martensitic heat - resistant stainless steel, and its strengthening mechanisms include:
- Solid - solution strengthening: High chromium (about 21%) forms a dense Cr₂O₃ oxide film. Combined with the solid - solution effect of Mo and V, it increases the recrystallization temperature of the matrix;
- Precipitation strengthening: Nb and V form fine carbonitrides (such as NbC, VN) with C and N, which are dispersedly distributed at grain boundaries and within grains, hindering dislocation movement;
- Grain - boundary strengthening: Trace rare - earth elements (optionally added) improve the grain - boundary state and inhibit high - temperature intergranular brittle fracture.
The core features of the product are as follows:
- Excellent high - temperature strength: The tensile strength is ≥350MPa at 850℃ - 950℃, with high creep rupture strength;
- Oxidation - resistant temperature up to 1000℃: The oxidation weight - gain rate during continuous use is
- Good resistance to sulfide corrosion: Suitable for high-sulfur fuel engines;
- Moderate machinability: Can be processed by hot forging, hot rolling, cold drawing, polishing, etc.;
- High dimensional accuracy: The tolerance of the round steel diameter is ±0.5mm, and it can be supplied in fixed lengths (length 1 - 6m);
- Customization flexibility: Supports surface strengthening treatments such as chrome plating and nitriding.
The following are typical technical specifications (taking the annealed state as an example):
| Item | Parameter |
| Chemical composition (wt%) | C: 0.55~0.65, Cr: 20.0~22.5, Mn: 9.0~11.0, Mo: 0.8~1.2, V: 0.8~1.2, Nb: 0.8~1.2, N: 0.15~0.25 |
| Density (g/cm³) | ≈7.85 |
| Tensile strength at room temperature (MPa) | ≥950 |
| Yield strength (MPa) | ≥750 |
| Elongation (%) | ≥12 |
| Tensile strength at high temperature (900℃) | ≥250 MPa |
| Hardness (HB) | ≤269 (annealed) |
The product can be widely used in: Exhaust valves of diesel engines, exhaust valves of gasoline engines, valve seats of gas engines, high-temperature bolts, valve stems of petrochemical valves, etc. Compared with 4Cr9Si2, the service life is extended by more than 50%; compared with 21 - 4N steel, it has better thermal fatigue resistance.
Company strength and trust endorsement
Liaocheng Jincheng Yangming Special Steel Co., Ltd. has been deeply involved in the special steel field for many years and has complete production and testing equipment, including spectrometers, universal testing machines, hardness testers, etc. The company sells more than 10,000 tons of heat-resistant steel, duplex steel, precipitation hardening steel, etc. annually. We adhere to the business philosophy of seeking truth from facts and honesty as the foundation. All materials leaving the factory are accompanied by material test reports, and the batch numbers can be traced. Among customers in industries such as petrochemical, ship machinery, and mining textiles, the repurchase rate exceeds 80%. For this valve steel, we offer:
- Small - batch trial materials can be provided (minimum order quantity: 200kg);
- Third - party testing is supported (such as SGS, CCIC);
- Free processing technology suggestions (heating temperature, forging ratio, etc.) are provided.
Consultation advice: If you are looking for valve materials with high temperature and corrosion resistance, or need to upgrade the materials of existing components, it is recommended to provide information such as operating temperature, medium composition, and stress state. We can assist in material selection and customize dimensions. Welcome to contact us to obtain samples and technical parameter sheets.
FAQ
-
What are the main differences between 61Cr21Mn10Mo1V1Nb1N and 21 - 4N materials?
Answer: 21 - 4N (5Cr21Mn9Ni4N) has a higher nickel content and higher cost; 61Cr21Mn10Mo1V1Nb1N uses the composite strengthening of Mo, V, and Nb, contains no Ni or trace amounts of Ni, has a lower cost, and has better high - temperature oxidation resistance than 21 - 4N, making it more suitable for high - sulfur fuel environments. -
Is this material suitable for turbocharger rotors?
Answer: Turbocharger rotors have extremely high requirements for high - temperature fatigue strength. This material is mainly used for exhaust valves and is generally not recommended for high - speed rotating parts. If you need materials for rotors, it is recommended to consult our other heat - resistant alloys (such as Inconel 718). -
How is the fixed length of the round steel determined?
Answer: We can cut according to customer requirements. The conventional lengths are 3m and 6m, and it can also be cut to any fixed length from 1 - 12m with an error of ±10mm. Special lengths need to be communicated in advance. -
Is pre - heating required during processing?
Answer: It is recommended to pre - heat to 800 - 850℃ before forging or hot rolling. The final forging temperature should not be lower than 900℃, and slow cooling is required after forging to prevent cold cracking. Specific processes can be provided in written guidance. -
Can you provide surface chrome plating treatment?
Answer: Yes. We can perform hard chrome plating (thickness 20 - 50μm) or nitriding treatment to improve surface hardness and wear resistance. Hydrogen removal treatment is required after chrome plating. -
Will a third - party inspection report be provided upon delivery?
Answer: By default, our company's material report will be provided. If you need third - party testing (such as tensile, composition, metallographic), you can specify the agency, and the cost will be calculated separately. -
What is the upper limit of the long - term service temperature of this material?
Answer: In an oxidizing atmosphere, the recommended long - term service temperature is ≤950℃; it can reach 1000℃ for a short time (≤200h). Oxidation weight gain accelerates when the temperature exceeds this limit. -
Is there a requirement for seawater corrosion resistance when it is applied to ship engines?
Answer: This material is mainly designed for high - temperature oxidation. If it is in long - term contact with seawater (such as the exposed part of the valve stem), it is recommended to use a surface coating or a duplex stainless - steel valve stem to avoid pitting corrosion.
Send Inquiry to This Supplier
You May Also Like
-
15crni3mov Alloy Steel Bar With Low-temperature Toughness, 15crni3mova Round Steel Resistant to Seawater Corrosion, Diameter 16 - 300US$ 1.46 - 1.77MOQ: 10 Kilograms
-
High-toughness 37simn2mov Low-temperature-resistant Round Steel, High-strength 30cr2ni2moa Alloy Steel Bars, Available for Cutting and RetailUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
High-strength Heat-resistant A335p22 Alloy Round Steel, Corrosion-resistant Sa213 T22 Round Bar and Forged Round, With a Complete Range of SpecificationsUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
Jinchengyangming Fatigue-resistant 35crmova Round Steel, High-toughness 35crmov Alloy Steel Bar, Sold by One Piece. InterruptedUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
American Standard Astm A350 Lf5 Alloy Round Steel, Low-temperature Resistant A350 Lf6 Round Bar Forgings, Cut and Sold Retail From 55 to 200US$ 1.46 - 1.77MOQ: 10 Kilograms
-
High-toughness 1.5752 Carburized Round Steel, 14nicr14 Round Steel for Machining, European Standard 15nicr13 Alloy Steel BarUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
09crcusb Low - Alloy Round Steel Resistant to Sulfuric Acid Dew Point, Low - Temperature nd Steel Rod for Power Plant Boilers, Large - Sized Reformed Small RoundsUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
High-strength Medium-carbon Alloy Structural Round Steel of 40crmnmoa, Alloy Round Bar for Heavy-duty Gear Shafts of 20crmnmoaUS$ 1.46 - 1.77MOQ: 10 Kilograms
-
Valve Forging A350 Lf2/lf3/lf5/lf6 Low Alloy Round Steel, Low Temperature Alloy Round Bar, Quality Assurance With GoodsUS$ 1.46 - 1.62MOQ: 10 Kilograms
-
Low-alloy High-strength 39nicrmo3 Chromium-nickel-molybdenum Alloy Steel, German Standard 1.6510 Steel for Aerospace Engine ShaftsUS$ 1.46 - 1.62MOQ: 10 Kilograms
