Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of UNS S38815 Stainless Steel Pipe and Tube | High Silicon Austenitic Stainless Steel Supplier in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
UNS S38815 stainless steel pipe and tube is a high-silicon austenitic stainless steel product designed for corrosive and high-temperature industrial environments. Compared with conventional 304 or 316L stainless steel, UNS S38815 contains significantly higher silicon content, combined with chromium, nickel, molybdenum and copper, giving it strong resistance to acid corrosion, oxidation, sulfidation and severe chemical media.
Xi'an Dongmeng Group Co., Ltd. supplies UNS S38815 stainless steel pipe, UNS S38815 stainless steel tube, seamless pipe and welded pipe for chemical processing, sulfuric acid systems, petrochemical equipment, marine engineering, metallurgy, high-temperature components and heavy industrial applications. UNS S38815 is also associated with ZeCor alloy, which was developed as a lower-cost high-silicon austenitic stainless steel option for concentrated sulfuric acid environments.
Professional team
7x24 hours
UNS S38815 Stainless Steel Pipe and Tube Overview
UNS S38815 is a specialty stainless steel grade developed for applications where standard stainless steels may not provide sufficient corrosion resistance. Its high silicon content helps form a protective silica/chromia-rich surface scale, improving resistance to acid corrosion, high-temperature oxidation, carburization and sulfidizing atmospheres.
For pipe and tube applications, UNS S38815 is selected where the piping system must withstand aggressive chemical media, elevated temperature or sulfur-containing environments. It is commonly considered for chemical plants, acid recovery systems, sulfuric acid processing, petrochemical equipment, marine systems, metallurgical plants and corrosion-resistant industrial equipment.
Our UNS S38815 stainless steel pipe and tube can be supplied according to project requirements, including customized OD, wall thickness, length, surface condition, end preparation, inspection documents and export packing.
Core Advantages
1. High Silicon Corrosion Resistance
UNS S38815 contains approximately 5.5–6.5% silicon, which improves resistance to aggressive acid media and high-temperature corrosion.
2. Suitable for Sulfuric Acid Environments
UNS S38815 / ZeCor-type alloy is associated with concentrated sulfuric acid service and was developed as a cost-effective high-silicon austenitic stainless steel for such environments.
3. Austenitic Stainless Steel Structure
The chromium-nickel austenitic matrix provides good corrosion resistance, toughness and fabrication performance for demanding industrial systems.
4. Mo and Cu Alloying Support
Molybdenum and copper help improve corrosion resistance in selected acidic and chemical environments.
5. Custom Pipe and Tube Supply
Seamless pipe, welded pipe, tube, cut-to-length pipe, beveled-end pipe and project-specific dimensions can be supplied according to buyer requirements.
Specifications & Standards
| Item | Available Range |
|---|---|
| Product | UNS S38815 Stainless Steel Pipe and Tube |
| Material Type | High Silicon Austenitic Stainless Steel |
| Material Category | 14Cr-16Ni-6Si-1Mo-1Cu |
| UNS Number | S38815 |
| Product Forms | Seamless Pipe, Welded Pipe, Tube, Custom Tube |
| Outside Diameter | Customized according to project requirement |
| Wall Thickness | Customized, standard wall and heavy wall available |
| Length | 5.8 m, 6 m, 11.8 m, 12 m, SRL, DRL, cut-to-length |
| Surface | Pickled, annealed, polished, passivated |
| Ends | Plain End, Beveled End, Threaded End, Capped End |
| Processing | Cutting, beveling, polishing, marking, packing |
| Testing | PMI, chemical analysis, tensile test, dimensional inspection, hydrostatic test |
| Certificate | MTC 3.1, EN 10204 3.1 / 3.2, third-party inspection |
| Packing | Plastic caps, bundles, wooden cases, seaworthy export packing |
Products Applications
Sulfuric Acid Systems
UNS S38815 stainless steel pipe is suitable for selected sulfuric acid handling, acid recovery and acid processing systems.
Chemical Processing
Used for corrosive chemical pipelines, reactors, acid-resistant equipment, chemical transfer systems and plant piping.
Petrochemical Industry
Suitable for sulfur-containing media, high-temperature corrosive systems, process piping and industrial equipment.
Marine Engineering
Used in selected seawater-related or chloride-containing corrosive environments where better corrosion resistance is required.
Metallurgy and Furnace Systems
Can be used in high-temperature industrial systems, metallurgical equipment and corrosion-resistant furnace-related components.
Power and Environmental Equipment
Suitable for selected flue gas, waste treatment, acid handling and high-temperature corrosion control systems.
Heavy Industrial Equipment
Used for corrosion-resistant tubular parts, sleeves, piping components and custom-fabricated industrial parts.
Chemical Composition (Weight %)
| Element | Content % |
|---|---|
| C | ≤ 0.03 |
| Si | 5.50–6.50 |
| Mn | ≤ 2.00 |
| P | ≤ 0.040 |
| S | ≤ 0.020 |
| Cr | 13.00–15.00 |
| Ni | 15.00–17.00 |
| Mo | 0.75–1.50 |
| Cu | 0.75–1.50 |
| Al | ≤ 0.30 |
| Fe | Balance |
Material Feature Analysis
High Silicon Content
The most important feature of UNS S38815 is its high silicon content. Silicon helps improve oxidation resistance and supports the formation of a protective oxide scale under high-temperature and corrosive conditions. MakeItFrom also notes that S38815 is notable among wrought stainless steels for its comparatively high silicon content.
Chromium-Nickel Austenitic Matrix
Chromium supports general corrosion and oxidation resistance, while nickel stabilizes the austenitic structure and improves toughness and corrosion resistance.
Molybdenum and Copper Addition
Mo and Cu improve resistance to selected reducing acid and chemical environments, making S38815 suitable for severe chemical processing systems.
Low Carbon Design
Low carbon content helps reduce carbide precipitation risk and supports better corrosion resistance in welded or heat-affected zones.
Mechanical Properties
| Property | Typical Supply Condition |
|---|---|
| Tensile Strength | According to final material specification and MTC |
| Yield Strength | According to final material specification and MTC |
| Elongation | According to final material specification and MTC |
| Hardness | According to final material specification and MTC |
| Condition | Annealed / Solution treated according to order requirement |
Final mechanical properties shall be confirmed according to the applicable standard, product form, heat treatment condition and material test certificate.
Physical Properties
| Property | Typical Description |
|---|---|
| Density | Similar to austenitic stainless steel |
| Structure | Austenitic stainless steel |
| Corrosion Resistance | Excellent in selected acid and sulfur-containing environments |
| Oxidation Resistance | Improved by high silicon content |
| Magnetic Property | Generally non-magnetic in annealed condition |
| Heat Resistance | Suitable for selected high-temperature corrosive environments |
Corrosion Resistance Analysis
UNS S38815 is mainly selected when the service environment is too aggressive for common stainless steel grades. Its high silicon, chromium and nickel combination provides improved resistance in selected acid and high-temperature corrosive conditions.
Sulfuric Acid Service
UNS S38815 / ZeCor-type alloy is associated with environments containing concentrated sulfuric acid. Alloy Digest describes ZeCor alloy UNS S38815 as developed as a lower-cost alternative among high-silicon austenitic stainless steels for concentrated sulfuric acid service.
High-temperature Corrosion
High silicon content helps improve oxidation resistance and supports protective scale formation under elevated temperature environments.
Sulfidizing Atmospheres
UNS S38815 is described in public material sources as suitable for hot, corrosive and sulfur-containing environments, including sulfidizing atmospheres.
Chemical Processing Media
Mo and Cu additions support corrosion resistance in selected chemical environments where conventional 304 / 316L may not meet service life expectations.
Processing Performance Analysis
UNS S38815 pipe and tube requires careful processing because of its special high-silicon alloy system.
Recommended processing points:
Use stable cutting parameters to avoid overheating.
Avoid surface contamination from carbon steel tools.
Use dedicated stainless steel processing equipment where possible.
Protect pipe ends during handling and transportation.
Confirm welding procedure before fabrication.
Use pickling and passivation where required.
For critical service, perform PMI and corrosion-related inspection before delivery.
High-silicon stainless steels may require stricter fabrication control than standard 304 / 316L stainless steel pipes.
Welding Performance Analysis
UNS S38815 can be welded, but welding procedures should be confirmed according to project requirements, pipe size, wall thickness and service environment.
Important welding considerations:
Use suitable filler material recommended for S38815 or project specification.
Control heat input during welding.
Avoid contamination from carbon steel.
Clean and protect the weld area before and after welding.
Pickling and passivation are recommended after welding where applicable.
For severe acid service, welding procedure qualification is strongly recommended.
PT / RT / UT inspection can be arranged for critical welds.
Alloy Digest notes that ZeCor alloy UNS S38815 composition is balanced to provide enhanced weldability within the high-silicon austenitic stainless steel family
UNS S38815 vs 316L Stainless Steel Pipe
| Item | UNS S38815 Stainless Steel Pipe | 316L Stainless Steel Pipe |
|---|---|---|
| Alloy Type | High silicon austenitic stainless steel | Mo-bearing austenitic stainless steel |
| Key Feature | High Si for acid and high-temperature corrosion resistance | General chloride corrosion resistance |
| Silicon Content | Approx. 5.5–6.5% | Usually much lower |
| Typical Use | Sulfuric acid, chemical, high-temperature corrosive media | Marine, food, chemical, general industrial piping |
| Cost | Higher than standard stainless steel | Lower and more common |
| Availability | Special order / project supply | Common stock grade |
| Best For | Severe corrosion and special acid service | General corrosion and chloride environments |
UNS S38815 vs UNS S32615
| Item | UNS S38815 | UNS S32615 |
|---|---|---|
| Type | High silicon austenitic stainless steel | High silicon acid-resistant austenitic stainless steel |
| Main Application | Acid, sulfur-containing, high-temperature corrosive environments | Concentrated sulfuric acid service |
| Supply Focus | Pipe, tube, plate, bar by project | Plate, pipe, tube, custom components |
| Buyer Selection | Based on chemical media, temperature, corrosion rate and project standard | Based on concentrated sulfuric acid conditions |
Inspection & Quality Assurance
Xi'an Dongmeng Group Co., Ltd. provides strict inspection for UNS S38815 stainless steel pipe and tube before shipment.
Products Description
| Inspection Item | Description |
|---|---|
| Raw Material Verification | Heat number, grade, melting batch and specification check |
| Chemical Analysis | Si, Cr, Ni, Mo, Cu and other key elements verification |
| PMI Test | Positive material identification before shipment |
| Dimension Inspection | OD, wall thickness, length, ovality and straightness |
| Surface Inspection | Cracks, pits, scratches, dents and surface contamination check |
| Mechanical Test | Tensile, yield, elongation according to final specification |
| Hydrostatic Test | Available according to order requirement |
| NDT Inspection | UT / RT / PT available for critical service |
| MTC | EN 10204 3.1 / 3.2 available |
| Third-party Inspection | SGS, BV, TUV, Lloyd's or customer-appointed inspection accepted |
Packaging & Shipping
Plastic caps on both ends
Pipe bundled with steel strips
Waterproof wrapping
Wooden cases for small diameter or precision tubes
Steel frame protection for large-size pipes
Anti-collision protection for beveled ends
Clear labels with grade, heat number, size and quantity
Export seaworthy packing
Container loading photos available
Shipping by sea, railway or air freight according to project schedule
Why Choose Xi'an Dongmeng Group Co., Ltd.
Special Alloy Supply Capability
We supply stainless steel pipe and tube not only in common grades, but also in special UNS grades such as S38815.
Project-based Customization
OD, wall thickness, length, end type, surface and inspection requirements can be customized.
Strict Material Verification
PMI, chemical composition check and MTC 3.1 can be provided to confirm grade accuracy.
Seamless and Welded Options
Suitable pipe type can be recommended according to pressure, temperature, corrosion media and budget.
Export Packing and Documentation
Seaworthy packing, marking, certificate documents and third-party inspection are available for international projects.
FAQ
1. What is UNS S38815 stainless steel?
UNS S38815 is a high-silicon austenitic stainless steel designed for corrosive and high-temperature industrial environments.
2. What is UNS S38815 used for?
It is used in sulfuric acid systems, chemical processing, petrochemical equipment, marine engineering, metallurgy and severe corrosion applications.
3. Is UNS S38815 the same as 316L?
No. 316L is a common molybdenum-bearing stainless steel, while UNS S38815 is a high-silicon specialty stainless steel with stronger performance in selected acid and high-temperature corrosive environments.
4. What is the silicon content of UNS S38815?
Public material data commonly lists UNS S38815 silicon content at approximately 5.5–6.5%.
5. Can you supply UNS S38815 seamless pipe?
Yes. Seamless UNS S38815 stainless steel pipe and tube can be supplied according to project size and quantity requirements.
6. Can you supply UNS S38815 welded pipe?
Yes. Welded pipe can be supplied for selected sizes, especially for project-based customized requirements.
7. Can UNS S38815 pipe be cut to custom length?
Yes. Cut-to-length service, beveling, marking and packing can be arranged before shipment.
8. Can you provide MTC 3.1?
Yes. MTC 3.1 and EN 10204 3.1 / 3.2 certificates can be provided according to order requirements.
9. Which information should I provide for quotation?
Please provide material grade, OD, wall thickness, length, quantity, pipe type, surface, end type, application environment and certificate requirements.
10. Can third-party inspection be arranged?
Yes. SGS, BV, TUV, Lloyd's or customer-appointed third-party inspection can be arranged before shipment.
Contact Us
Xi'an Dongmeng Group Co., Ltd.
Phone / WhatsApp / WeChat: +8615769214734
Email: office@dongmjd.com
Looking for UNS S38815 stainless steel pipe price, datasheet or MTC sample? Contact us today for a fast quotation.
Hot Tags: UNS S38815 Stainless Steel Pipe and Tube | High Silicon Austenitic Stainless Steel Supplier, China UNS S38815 Stainless Steel Pipe and Tube | High Silicon Austenitic Stainless Steel Supplier manufacturers, suppliers, factory, UNS S38815 Stainless Steel Pipe And Tube, UNS S44735 Stainless Steel Tube
