Sihe Steel
Sihe Steel
Seamless and welded ASTM A269 TP317 tubing featuring enhanced molybdenum content for superior resistance to pitting and crevice corrosion in saline water environments.
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Heavy-wall ASTM A312 TP317 pipes suitable for high-temperature pressure piping and heat exchangers within coastal refineries and industrial manufacturing hubs.
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Titanium-stabilized ASTM A269 321H tubing engineered for elevated high-temperature application, effectively preventing intergranular corrosion under continuous heat cycle exposure.
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High-carbon 321H stainless steel piping manufactured to ASTM A312. Designed for long-term creep resistance and high strength in exhaust headers, heat exchangers, and boilers.
View SpecificationsAustralia’s industrial sector operates in some of the most aggressive physical environments on the planet. From hyper-saline groundwater extraction in the Pilbara iron ore fields to severe sea-salt spray in Gladstone’s LNG facilities, process piping suffers rapid localized degradation. In these contexts, standard austenitic steels like 316L frequently fall victim to pitting and stress corrosion cracking (SCC) due to elevated chloride concentrations and process temperatures.
Grade 317 (UNS S31700) and its low-carbon variant 317L (UNS S31703) represent a significant metallurgical upgrade. Formulated with a 3.0% to 4.0% molybdenum content (compared to 2.0% in 316L), these alloys are custom-suited for critical thermal systems where downtime equals millions in lost production. As local operators target longer maintenance lifecycles, the adoption of 317L in shell-and-tube heat exchangers, condensers, and chemical reactors has grown exponentially.
PREN calculates corrosion resistance in chloride environments. While Grade 316L sits at a PREN of 23-25, Grade 317L delivers a PREN of 29-32, offering a significant threshold increase against pitting attack.
Crucial for sulfuric and phosphoric acid processes common in WA and QLD leach plants, 317L resists attack in dilute solutions up to high processing temperatures.
Australian coal-fired power conversion and heavy processing installations utilize 317L to handle condensate acids forming in low-temperature ductwork and heat exchangers.
| Steel Grade (UNS) | Carbon (C) % max | Chromium (Cr) % | Nickel (Ni) % | Molybdenum (Mo) % | Nitrogen (N) % | Min. PREN value |
|---|---|---|---|---|---|---|
| 316L (UNS S31603) | 0.030 | 16.0 - 18.0 | 10.0 - 14.0 | 2.00 - 3.00 | 0.10 max | ~ 23.1 |
| 317 (UNS S31700) | 0.080 | 18.0 - 20.0 | 11.0 - 15.0 | 3.00 - 4.00 | - | ~ 27.9 |
| 317L (UNS S31703) | 0.030 | 18.0 - 20.0 | 11.0 - 15.0 | 3.00 - 4.00 | 0.10 max | ~ 29.5 |
| 904L (UNS N08904) | 0.020 | 19.0 - 23.0 | 23.0 - 28.0 | 4.00 - 5.00 | 0.10 max | ~ 34.2 |
| Duplex 2205 (S32205) | 0.030 | 22.0 - 23.0 | 4.5 - 6.5 | 3.00 - 3.50 | 0.14 - 0.20 | ~ 35.0 |
Key Engineering Takeaway: While Duplex 2205 provides higher strength and PREN, it suffers from embrittlement at service temperatures exceeding 300°C. 317L maintains excellent mechanical properties, creep resistance, and ductility up to high temperatures, making it the preferred choice for thermal design engineers building heat exchangers that experience variable hot service temperatures under Australian pressure vessel code AS 1210.
Liaocheng Sihe Stainless Steel Material LTD is a premier global manufacturer specializing in high-performance stainless steel coiled tubes, bright annealed precision piping, and custom heat exchanger configurations. Utilizing six advanced production lines, our operations tightly adhere to international standards: GB, ASTM, ASME, JIS, and EN.
Our technology lead is driven by our automated online gas-shielded bright annealing system. Unlike traditional air-annealed pipes that require chemical pickling and leave rough surface microstructures, our bright annealing keeps the internal and external surfaces mirror-smooth. This decreases fouling rates in heat exchangers and minimizes flow friction, ensuring thermal efficiency remains stable throughout the life of the exchanger.
Highly resistant to hot chloride water produced in natural gas separation. Used in offshore production platforms near the North West Shelf and inside onshore processing complexes.
Perfect for leach heat exchangers handling dilute sulfuric solutions during hydrometallurgical processing of copper, gold, and nickel ores.
High-purity ASTM A269 TP317L tubing provides non-reactive surface characteristics that withstand heavy Clean-In-Place (CIP) chemicals, ensuring zero contamination.
Excellent resistance to brackish and high-temperature seawater, providing stable performance in preheating stages and high-pressure reverse osmosis piping.
Precision adjustment of chemical composition (e.g., higher Mo or low-C 317L specs) and custom sizing (6.35mm to 25.4mm) to match target pressure vessel layouts.
In-house spiral coiling, U-bend forming, precision drawing, and secondary fabrication designed specifically for shell-and-tube exchangers.
Precision face machining, expanding, and custom flanging processes to enable leak-free integration with heavy industrial piping hubs.
Direct factory pricing for heavy-duty heat exchanger tubing. Fully tested to ASTM A213 standards for pressure applications.
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Optimized 304 grade tubing with smooth internal diameter designed for sanitary cooling coils in the Australian brewing industry.
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Titanium stabilized Grade 409 welded steel pipe designed for moderate corrosion resistance in exhaust and heat recovery assemblies.
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Ultra-high grade 904L coiled pipes offering top-tier resistance to sulfuric, phosphoric, and organic acid streams in industrial processing.
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Economical grade 202 welded pipes for structure, ventilation, and exhaust applications requiring standard heat resistance.
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Precision drawn 316 grade capillary tubes for instrumentation, cooling systems, and analytical equipment in high-demand environments.
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Nickel-chromium-molybdenum Alloy 625 coiled tubes for deep sea oil recovery, hydraulic control, and extreme acid gas treatment.
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Polished EN 1.4512 tubing manufactured for automotive exhaust manifolds, catalytic converter casings, and thermal recovery devices.
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High-integrity titanium-stabilized 409 sheet stock providing structural heat resistance for furnace parts and exhaust housings.
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Highly polished 201 grade decorative and structural tubing designed for dry environment installations and display systems.
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JIS standard compliant SUS316 welded pipes for chemical and seawater instrumentation control networks and industrial equipment.
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Premium cold-rolled 304 grade sheets ideal for structural cladding, chemical storage skins, and structural fabrications.
Request PricelistTo ensure complete reliability in hazardous and high-pressure heat transfer environments, all Liaocheng Sihe products undergo strict testing cycles. We provide comprehensive mill test certifications (MTC) conforming to EN 10204 3.1.
ISO 9001 System Certificate
Bureau Veritas Certification
CE Pressure Equipment Directive
TUV Factory Approvals
SGS Third Party Verification
ABS Marine Grade Approval
NK Class Registration
DNV GL Pressure Approval
ASME Section II Compliant
NATA Testing Facility Equivalent
ISO 14001 Environmental
OHSAS 18001 Occupational Safety
Engineers in the Australian resources sector are moving away from cheap upfront materials. Standard 316L systems that require replacement every 3 to 5 years are being replaced by 317L, which can double operational lifespans. This reduces maintenance costs and minimizes lost revenue from unplanned shutdowns.
Strict environmental protections in Australian waterways prevent the discharge of high-temperature cooling effluents. Consequently, closed-circuit heat exchangers are operating under higher internal temperatures and using more concentrated recycled process water, requiring the superior corrosion resistance of 317L.
The biotechnology and pharmaceutical sectors in Melbourne and Sydney are demanding improved inner-diameter surface profiles. Bright annealed 317L capillaries and small-diameter piping are becoming standard to prevent biological adhesion and contamination.
To reduce on-site construction costs in remote mining areas, companies are shifting toward prefabricated modular skid units. Utilizing continuous, orbital-weld-free coiled tubing allows for lighter and more compact heat exchanger designs that are easier to transport and install.