ASTM A479 316 Stainless Steel Hex Bar - 25mm Flats, Chemical Plant
Equipment Material
ASTM A479 316 stainless steel hex bar (25mm flats) is a high-performance material designed for demanding
chemical processing environments. Manufactured to ASTM A479
specifications, this hex bar combines superior corrosion
resistance, elevated temperature stability, and mechanical
strength. The 316 grade’s addition of molybdenum (2–3%) enhances
resistance to chlorides, acids, and caustic solutions, making it
ideal for reactors, piping systems, and valves in chemical plants.
With precision-machined 25mm flat surfaces and a uniform grain
structure, it ensures reliability in aggressive media, including
sulfuric acid, brine, and organic solvents.
2. Technical Specifications
| Parameter | Details |
|---|
| Material | 316 Stainless Steel (UNS S31600) |
| Element Composition | Cr: 16–18%, Ni: 10–14%, Mo: 2–3%, C: ≤0.08%, Mn: ≤2%, Si: ≤1%, Fe:
Balance |
| Standard | ASTM A479, ASME SA479, EN 10088-1 |
| Dimensions | Hexagonal, 25mm flats (±0.1mm tolerance), lengths 1–6 meters |
| Surface Finish | Pickled, blasted, or polished (Ra ≤3.2μm) |
| Tensile Strength | ≥515 MPa |
| Hardness | ≤95 HRB |
| Certifications | NACE MR0175, PED 2014/68/EU, ISO 9001 |
| Applications | Reactor components, heat exchangers, pump shafts, valve bodies |
3. Competitive Advantages
① Extreme Chemical Resistance
Molybdenum-enriched 316 stainless steel resists pitting and crevice
corrosion in chloride-rich or acidic environments, outperforming
304 grades.
② ASTM A479 Compliance
Guaranteed dimensional accuracy and metallurgical integrity for
high-stress applications in chemical and petrochemical industries.
③ High-Temperature Durability
Maintains structural stability up to 870°C, suitable for heat
exchangers and exhaust systems exposed to thermal cycling.
④ Versatile Fabrication
Precision hexagonal bars simplify machining into bolts, nuts, and
custom fittings for complex chemical equipment.
⑤ Global Certifications
NACE MR0175 compliance ensures compatibility with sour gas
environments, while PED certification supports pressure equipment
safety.
⑥ Surface Finish Options
Customizable finishes (e.g., pickled for weldability or polished
for cleanroom compatibility) meet diverse operational needs.
4. Key Applications
- Chemical Reactors: Hex bars for agitator shafts, reactor lids, and flange
connections in acid processing units.
- Piping Systems: Corrosion-resistant fittings, couplings, and valve stems for
transporting aggressive chemicals.
- Heat Exchangers: Tubesheets, baffle supports, and headers resistant to thermal
stress and corrosive coolants.
- Pharmaceutical Equipment: USP Class VI-compliant bars for solvent handling and sterile
processing machinery.
- Oil Refining: Pump components, distillation column internals, and scrubber
systems in H₂S-containing environments.
- Waste Treatment: Bars for sludge scraper mechanisms, filtration units, and
chlorine dioxide exposure zones.
Why Choose This Product?
Engineered for critical chemical applications, ASTM A479 316 hex
bars deliver unmatched resistance to corrosion, heat, and
mechanical stress. Their precision manufacturing and compliance
with global standards ensure seamless integration into equipment
requiring long-term reliability in harsh operational conditions.
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.
