Precision Crafted: ZYTC's TP347H Pipes Meet Stringent US Standards

In a significant milestone, ZYTC Alloy has successfully executed an order for ASTM A269/A269M-compliant TP347H stainless steel seamless pipes, customized to exacting US specifications. The non-standard dimensions (152.4×4.76×1524 mm) required innovative reprocessing of 168×8 mm tubes, achieving remarkable dimensional tolerances:

• Outer Diameter: ±0.51 mm

• Wall Thickness: ±12.5%

This achievement underscores our commitment to standardized, process-driven manufacturing and rigorous quality validation, ensuring client acceptance upon delivery.

Why TP347H? Key Properties & Applications

347H Chemical Composition
TP347H is a niobium-stabilized austenitic Cr-Ni stainless steel. Its optimized composition ensures resilience in aggressive environments:

• Carbon (C): 0.04–0.10%

• Chromium (Cr): 17.0–19.0%

• Nickel (Ni): 9.0–13.0%

• Niobium (Nb): ≥8×Carbon % (max 1.00%)

• Low impurities (Si, Mn, P, S controlled)

The addition of niobium prevents carbide precipitation, dramatically enhancing resistance to intergranular corrosion and stress cracking in corrosive media like acids, salts, or high-temperature steam.

347H Mechanical Properties
TP347H excels under thermal and mechanical stress, with key properties including:

• Tensile Strength: ≥530 MPa

• Yield Strength: ≥205 MPa

• Elongation: ≥40%

• Hardness: ≤289 HBW

• Creep Strength: Superior performance at sustained temperatures up to 750°C

Diverse Industrial Applications
This alloy is indispensable where reliability is non-negotiable:

• Power Generation: Superheaters, reheaters, boiler tubes in ultra-supercritical power plants

• Petrochemical: Heat exchangers, high-pressure steam Pipelines

• Aerospace: Exhaust systems, turbine components (≤850°C)

• Renewables: Molten salt tanks & transfer pipes in solar thermal plants

• Nuclear: Coolant system components

ZYTC’s Manufacturing Capabilities: Beyond Pipes

We deliver comprehensive TP347H solutions across forms:

• Primary Forms: Plates, strips, wires, Bars, seamless tubes (incl. capillary tubes), forgings

• Processing Expertise: Cold/hot rolling, drawing, polishing, heat treatment

• Quality Assurance: Compliance with ASTM, EN, and AMS standards via chemical analysis, hydrostatic testing, NDE (ultrasonic/eddy current), and mechanical validation

Why Partner with ZYTC?

• Rapid Delivery: Agile production for standard and custom geometries

• Cost Efficiency: Competitive pricing without material or process compromise

• Global Compliance: Certifications for global industrial applications

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www.zytcalloy.com
ZYTC Alloy｜ Your Ultimate Solution For Various Applications
Email: dominic@zytc-steel.com
bruce@zytc-steel.com
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