Product Specification

Corrosion-Resisting Duplex Steel SUS329J4L F61Stainless Steel Round Bar OD 20-380MM

Description

SUS329J4L, S329J4L, S31260, S32506 Duplex Stainless Steel

A duplex stainless steel having resistance to chloride-ion corrosion. It has excellent resistance to pitting corrosion and stress-corrosion cracking in hot seawater

Technical Specifications

• Chemical Composition (Table Format):

  Element	Cr	Ni	Mo	Mn	C	N	Fe
  % Range	22-24	4.5-6.5	2.5-3.5	≤2.0	≤0.03	0.08-0.20	Balance

• Mechanical Properties (Table Format):

  Property	Tensile Strength	Yield Strength	Elongation	Hardness (HB)	Impact (J)
  Value	620-820 MPa	≥450 MPa	≥25%	≤290	≥100

• Corrosion Resistance:
  • PREN (Pitting Resistance): ~34-36 (Cr + 3.3Mo + 16N).
  • Resists chlorides, acids, and sour gas (H2S).

Procurement Guidance

• How to Select SUS329J4L:
  • When to Use:
    • Moderate chloride exposure (e.g., coastal environments).
    • Applications needing high strength and SCC resistance.
  • Compare with Other Grades:

    Grade	PREN	Yield Strength (MPa)	Cost Efficiency
    SUS329J4L	~35	≥450	Moderate
    316L	~26	≥170	Low
    2205	~35	≥450	Moderate
    2507	~42	≥550	High

Workability

High temperature strength to in the range of 950~1150℃. However the steel shows rapid increase in the strength below 900℃. Regarding cold workability, care is required as proof stress is high and elongation is low in comparison 

Duplex steel Weldability

Various welding methods are applicable in the same manner as with the standard austenitic stainless steels, including shielded metal arc welding, TIG welding, and plasma welding. Same duplex grade type welding consumable should be used.

Pickling

A mixture of nitric acid and fluoric acid is used in pickling. However, because descaling is somewhat difficult in comparison with SS304, alkali immersion
before acid pickling, and if possible, shot blasting are extremely effective.

Applications in Engineering Industries

• Key Industries:
  • Oil & Gas: Pipelines, valves, and heat exchangers in sour service.
  • Chemical Processing: Reactors, tanks for acidic media.
  • Desalination: Seawater handling systems.
  • Pulp & Paper: Bleaching equipment.
  • Architecture: Coastal structures (bridges, facades).
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  • FAQ
    Q1: What is your terms of payment?
    A: 30% T/T in advance, the balance 70% before delivery. We will show you the photos of products and package before you pay the balance.
    
    Q2: what is the terms of delivery?
    A: EXW, FOB, CIF, CFR, DDU
    
    Q3: What is the terms of packing?
    A: generally, we pack our goods in bundles or coils with rods or belts, we could also pack the goods as the customers' requirement.
    
    Q4: What is your delivery time?
    A: For stocks, we could transport the goods to loading port within 7 days after we received your deposit. For production period,it usually takes about 15 days-30 days after receiving the deposit.
    
    Q5: Could you provide the samples?
    A: yes, we could provide the free samples on conditons it is available in stocks, however, the the transportation fee is borne by buyer.
    
    Q6: How could you guarantee your products?
    A: Each piece of products is manufactured by certified workshops, inspected by Lenser piece by piece according to national QA/QC standard. We also could issue the warranty to customer to guarantee the quality