Alloy steel four-way fittings belong to special pressure-bearing four-way pipe fittings, with materials mainly consisting of chromium-molybdenum heat-resistant alloy steels such as 15CrMo, 12Cr1MoV, Cr5Mo, Cr9Mo, P11, P12, P22, F11, F22, etc., formed through integral forging, heat treatment, and precision machining. Compared with carbon steel and stainless steel four-way fittings, it is designed for high-temperature above 450°C, high-pressure hydrogen service, and high-temperature creep conditions. Ordinary pipe fittings in such environments are prone to strength degradation, creep deformation, or hydrogen embrittlement cracking, while alloy steel four-way fittings rely on a stable alloy metallographic structure and possess properties such as high-temperature resistance, high-pressure resistance, hydrogen corrosion resistance, high-temperature oxidation resistance, and creep resistance. Product diameters cover DN6–DN600, pressure ratings cover 3000LB–9000LB, PN100–PN160, suitable for Sch80, Sch160, XXS thickened wall thicknesses, and comply with GB/T12459, GB/T14383, ASME B16.9, ASME B16.11, GD electric power standards, and SH/T petrochemical standards. Mainly used for power station boiler superheaters, reheaters, main steam pipelines, as well as high-temperature and high-pressure pipeline systems in refining, hydrogenation, coal chemical, and other installations.
- Chromium-molybdenum heat-resistant alloy material, designed for high-temperature above 450°C, high-pressure hydrogen service, and high-temperature creep conditions, different from ordinary carbon steel and stainless steel four-way fittings
- Integrally forged and formed as one piece, with no spliced welds, reducing weak points in high-temperature and high-pressure pipelines
- Materials cover commonly used chromium-molybdenum heat-resistant alloy steels such as 15CrMo, 12Cr1MoV, Cr5Mo, Cr9Mo, P11, P12, P22, F11, F22, etc.
- Diameters cover DN6–DN600, pressure ratings cover 3000LB–9000LB, PN100–PN160, suitable for Sch80, Sch160, XXS thickened wall thicknesses
- Comply with GB/T12459, GB/T14383, ASME B16.9, ASME B16.11, GD electric power standards, and SH/T petrochemical standards
- Supports non-standard customization according to drawings, imported equipment parameters, and electric power and petrochemical technical agreements, including special-shaped inclined four-way fittings, extended high-pressure straight pipe sections, special flange hole spacing, etc.
- Before leaving the factory, perform spectral material re-inspection, high-temperature mechanical testing, non-destructive testing, high-pressure pressure testing, precision dimensional inspection, and heat treatment parameter verification
- Genuine products come with a 12-month official warranty. During the warranty period, free remanufacturing or replacement will be provided for quality issues such as material nonconformity, high-temperature creep failure, internal defects, and performance not meeting standards.
| Product Name | Alloy Steel Cross |
| Product Categories | Cross |
| Customization | The factory possesses heavy-industry-grade deep non-standard customization capabilities for alloy steel cross fittings in all materials and all specifications, focusing on the customization of special non-standard pipe fittings for high-temperature, high-pressure, hydrogen-service, and creep conditions, covering all heavy-industry extreme working condition requirements. Supports DN6–DN600 full-caliber non-standard sizes, special thickened high-pressure wall thicknesses, unconventional reducing ratios, and ultra-high-pressure custom grades, suitable for connection with old imported heavy-industry equipment and non-standard pipe network renovation in power station and petrochemical technical upgrades. Materials can be customized across the entire series of chromium-molybdenum heat-resistant alloy steels including 15CrMo, 12Cr1MoV, Cr5Mo, Cr9Mo, P11, P12, P22, F11, and F22, covering all working conditions of medium-high temperature, ultra-high temperature, and hydrogen-service corrosion. Can customize heavy-industry special-shaped inclined cross fittings, extended high-pressure straight pipe sections, non-standard high-pressure threaded |
| MOQ | Alloy steel cross fittings adopt a heavy-industry special pipe fitting flexible customization minimum order mode, adapting to the diverse urgent needs of heavy-industry projects such as sporadic technical upgrades, pipe network emergency repairs, equipment replacement, engineering inspection submissions, and batch centralized procurement. Conventional DN15–DN100, 15CrMo/12Cr1MoV mainstream heat-resistant alloy standard in-stock specifications support a minimum order of 1 piece, fully meeting the needs of power station emergency repairs, petrochemical technical upgrades, and high |
| Lead Time | Alloy steel cross fittings establish a four-tier delivery system of in-stock urgent orders, conventional mass production, high-end alloy, and non-standard heavy industry, precisely adapting to the core needs of heavy-industry engineering technical upgrades: urgent, strict processes, high customization, and stable schedules. The warehouse regularly stocks 15CrMo and 12Cr1MoV mainstream small and medium-caliber high-pressure alloy cross fittings, with rapid shipment within 24–48 hours after order confirmation, meeting the needs of power station emergency repairs, |
| Packaging | Alloy steel cross fittings are heavy-industry high-pressure precision special pipe fittings, with expensive materials, extremely high precision, and port sealing surfaces and threads that are highly prone to bump damage, and alloy parts strictly prohibit impurity contamination and stress bumps, so heavy-industry-grade precision protective packaging standards are implemented at the factory. All products undergo degreasing and cleaning, rust and oxide scale removal, and burr fine grinding treatment before leaving the factory, with clean surfaces free of impurities and oxide layers. High-pressure threaded ports are equipped with thickened high-strength plastic protective caps to prevent thread galling, bumps, and dust damage; socket ports, butt-weld bevels, and sealing surfaces are individually film-covered with anti-collision protection to ensure welding and assembly precision. Each piece is individually wrapped in multiple layers of bubble film, precision high-pressure small parts are individually hard-box packaged, and categories are labeled with material, heat number, pressure rating, and standard number to prevent mixed-loading friction damage. Large-caliber heavy-industry alloy |
| Reference Price | Inquiry |
| Brand | Guojie |
Applications
- High-temperature and high-pressure pipelines for superheaters, reheaters, and main steam in thermal power plants and cogeneration plants
- High-temperature process piping for cogeneration and pressure-bearing nodes of high-pressure auxiliary equipment in power plants
- High-temperature heavy oil transmission pipelines and high-temperature high-pressure reactor distribution nodes in oil refineries
- Hydrogen-contacted high-pressure piping in petrochemical hydrogenation units
- High-temperature cracking piping network in coal chemical plants
- High-temperature heat transfer oil piping and high-pressure steam process systems
- High-temperature fluid circulation piping for heavy industrial equipment
- Sporadic or batch procurement such as power station emergency repairs, petrochemical technical upgrades, equipment replacement, and engineering inspection submissions
Procurement & Delivery
Alloy steel cross fittings are supplied according to the heavy-industry special pipe fitting flexible customization model. Standard stock specifications of conventional DN15–DN100, 15CrMo/12Cr1MoV mainstream heat-resistant alloys support a minimum order of 1 piece, suitable for scenarios such as power station emergency repairs, petrochemical technical upgrades, equipment replacement, and engineering inspection submissions. The warehouse keeps in stock 15CrMo and 12Cr1MoV mainstream small and medium diameter high-pressure alloy crosses, shipped within 24–48 hours after order confirmation. For other materials, diameters, pressure ratings, and non-standard customized products, please contact us to confirm the production schedule and delivery arrangements. Packaging is carried out according to heavy-industry-grade precision protection standards. Before leaving the factory, degreasing and cleaning, rust and oxide scale removal, and burr fine grinding are completed. Threaded ports, socket ports, butt-weld bevels, and sealing surfaces each have individual protection. Large-diameter products use solid wood reinforced pallets and steel strap locking. For export orders, fumigated pallets, English customized shipping marks, bilingual packing lists, and batch traceability lists can be provided.
Service & Support
We provide technical support for alloy steel crosses from selection to after-sales service. Before sale, we can assist with high-temperature working condition material selection, pressure rating verification, heat treatment process matching, and pipeline scheme optimization; during sale, we track the progress of forging, heat treatment, and quality inspection; after sale, we provide welding installation, pressure test commissioning, troubleshooting, and operation and maintenance technical support. All products undergo spectral material re-inspection, high-temperature mechanical testing, non-destructive flaw detection, high-pressure pressure testing, precision dimensional inspection, and heat treatment parameter verification before leaving the factory. Genuine products enjoy a 12-month official warranty. During the warranty period, under conditions of non-human-caused overpressure, improper installation, and over-temperature use, if quality problems such as material non-conformity, high-temperature creep failure, internal defects, and performance not meeting standards occur, we will remake or reship free of charge. Unused standard products support seven-day no-reason return and exchange, 2-hour rapid response, and lifetime free technical consultation for alloy pipe fittings.
FAQ
What is the difference between alloy steel crosses and carbon steel and stainless steel crosses?
Alloy steel crosses use chromium-molybdenum heat-resistant alloy steel and are designed for high-temperature above 450°C, high-pressure hydrogen service, and high-temperature creep working conditions. Carbon steel and stainless steel crosses are prone to creep deformation, hydrogen embrittlement cracking, and strength degradation in such environments, and cannot meet the operating requirements of high-temperature and high-pressure pipelines such as power station boilers and petrochemical hydrogenation. For heavy-industry high-temperature and high-pressure working conditions, alloy steel crosses are recommended.
How to choose commonly used alloy materials?
15CrMo and 12Cr1MoV are suitable for conventional power station high-temperature steam pipelines below 580°C and are materials kept in stock in the warehouse. Materials such as Cr5Mo, Cr9Mo, P11, P12, P22, F11, and F22 are suitable for higher temperature or hydrogen service corrosion working conditions. For specific selection, please contact us, and we will assist in confirming according to your medium temperature, pressure, and working condition conditions.
Can you customize according to drawings or imported equipment parameters?
Yes. We support one-to-one forging production according to heavy-industry drawings, imported equipment parameters, and electric power and petrochemical technical agreements. We can customize DN6–DN600 full-diameter non-standard sizes, special thickened high-pressure wall thicknesses, non-conventional reducing ratios, special-shaped inclined crosses, extended high-pressure straight pipe sections, non-standard high-pressure thread profiles, special flange hole spacing, and eccentric transition structures, etc. Please provide drawings or technical parameters, and we will assist in confirming the customization plan.
What are the in-stock delivery time and minimum order quantity?
Standard in-stock specifications of conventional DN15–DN100, 15CrMo/12Cr1MoV mainstream heat-resistant alloys support a minimum order of 1 piece, with shipment within 24–48 hours after order confirmation. For other materials, diameters, and non-standard customized products, please contact us to confirm the production schedule and delivery arrangements.
What inspections are performed before the products leave the factory?
Before leaving the factory, all alloy steel cross fittings undergo spectral material re-inspection, high-temperature mechanical testing, non-destructive testing, high-pressure pressure testing, precision dimensional inspection, and heat treatment parameter verification, to ensure that material purity, metallographic performance, and pressure-bearing stability meet the requirements.
How are warranty and after-sales service arranged?
Genuine products uniformly enjoy a 12-month official warranty. During the warranty period, in cases of non-human-caused overpressure, improper installation, or over-temperature use, if quality problems occur such as material mismatch, high-temperature creep failure, internal defects, or performance not meeting standards, we will remake or reship free of charge. Unused standard products support seven-day no-reason return and exchange, with a 2-hour rapid response and free lifetime technical consultation.
