AISI 410 Stainless Steel Threaded Bar - M20 Size, Pressure Vessel Construction Use
AISI 410 stainless steel threaded bars (M20 size) are engineered for high-strength, high-temperature applications in pressure vessel systems, petrochemical plants, and power generation equipment. The martensitic structure of AISI 410, combined with heat treatment, delivers exceptional tensile strength, corrosion resistance, and durability under extreme pressure and thermal cycling. The M20 threading (metric coarse thread) ensures secure fastening in critical joints, while the material’s resistance to oxidation and stress corrosion cracking (SCC) makes it ideal for sour gas and acidic environments.
2. Technical Specifications
| Parameter |
Details |
| Material |
AISI 410 Stainless Steel (UNS S41000) |
| Element Composition |
Cr: 11.5–13.5%, C: ≤0.15%, Mn: ≤1%, Si: ≤1%, Fe: Balance |
| Thread Specification |
M20 (Metric Coarse Thread), DIN 975/976 compliant |
| Heat Treatment |
Annealed, hardened, and tempered to achieve optimal mechanical properties |
| Tensile Strength |
≥700 MPa |
| Surface Finish |
Plain or black oxide-coated for enhanced corrosion resistance |
| Certifications |
ASTM A276, ASME SA193, EN 10088-1, PED 2014/68/EU |
| Applications |
Pressure vessel flanges, pump housings, valve stems, heat exchangers |
3. Competitive Advantages
① High-Temperature Performance
AISI 410 retains strength and oxidation resistance up to 650°C, ensuring reliability in thermal power plants and refinery systems.
② Precision Threading
CNC-machined M20 threads with tight tolerances (±0.1mm) guarantee leak-proof connections in high-pressure environments.
③ Corrosion Resistance
Chromium content (11.5–13.5%) provides resistance to mild acids, chlorides, and steam, suitable for offshore and chemical industries.
④ ASME & PED Compliance
Certified to ASME SA193 (high-temperature bolts) and PED standards, ensuring compliance with global pressure equipment regulations.
⑤ Custom Heat Treatment
Tailored hardening and tempering processes optimize hardness (22–28 HRC) while minimizing brittleness for dynamic loads.
⑥ Cost-Effective Alternative
Superior wear resistance compared to carbon steel reduces replacement frequency, lowering lifecycle costs.
4. Key Applications
- Pressure Vessels: Threaded bars for reactor heads, manway covers, and flanges in oil refineries and LNG tanks.
- Power Generation: Fasteners for steam turbine casings, boiler supports, and geothermal energy systems.
- Petrochemical Plants: Acid-resistant bolts for pipelines, scrubbers, and distillation column assemblies.
- Marine Engineering: Corrosion-resistant fasteners for desalination units and offshore platform equipment.
- Automotive Turbochargers: High-strength studs for exhaust manifolds and turbo housing under thermal stress.
- Hydraulic Systems: Durable threaded rods for high-pressure pumps and hydraulic valve blocks.
Why Choose JIANGSU CHINA STEEL UNION INDUSTRIAL CO., LTD?
We specialize in high-performance stainless steel fasteners designed for extreme operational demands. Our AISI 410 threaded bars are rigorously tested to meet international standards, ensuring safety, longevity, and efficiency in pressure vessel construction. Partner with us for precision-engineered solutions backed by technical expertise and reliable supply chains.
FAQ
Q: Why choose us?
A: Our company have been in steel business for more than ten years, we are internationally experienced, professional, and we can provide variety of steel products with high quality to our clients.
Q: Can provide OEM/ODM service?
A: Yes. Please feel free to contact us for more details discuss.
Q: How is your Payment Term?
A:One is 30% deposit by TT before production and 70% balance against copy of B/L; the other is Irrevocable L/C 100% at sight.
Q: Can we visit your factory?
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.
Q: Can you provide sample?
A: Yes, for regular sizes sample is free but buyer need to pay freight cost.
Q: How long is your delivery time?
A: Our daily inventory is more than 8000 tons, so for common product size, just need 3 days from stocks; if the special size from new production, delivery 15-20 days.
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