The consignment is destined for an offshore platform seawater service on Malaysia's continental shelf, where cooling, firewater and injection lines are exposed to chlorinated seawater at roughly 19,000 ppm chloride. Such duty rules out conventional austenitic grades - 316L typically pits within 2–5 years - and demands a material that survives bare, uncoated and without cathodic protection. Super Duplex 2507 was selected as the optimal balance of corrosion resistance, strength and total installed cost.
Shipment Details
|
ITEM |
DESCRIPTION |
U.O.M |
QTY |
|
Pipe 2" |
Pipe, BE, Smls, SDSS, ASTM A790 UNS S32750, Sch. 40S, Dims to ASME B36.19 |
MTR |
24 |
|
Pipe 4" |
Pipe, BE, Smls, SDSS, ASTM A790 UNS S32750, Sch. 40S, Dims to ASME B36.19 |
MTR |
48 |
|
Pipe 6" |
Super Duplex Pipe ANSI/ASME B36.19M SCH40S 6'' ASTM A790 UNS S32750 |
MTR |
60 |
|
Pipe 8" |
Super Duplex Pipe ANSI/ASME B36.19M SCH40S 8'' ASTM A790 UNS S32750 |
MTR |
72 |
|
Pipe 10" |
Super Duplex Pipe ANSI/ASME B36.19M SCH10 10'' ASTM A790 UNS S32750 |
MTR |
96 |
|
Pipe 10" |
Pipe, BE, Welded [EFsW], SDSS, A928 UNS S32750 Cl. 5, Sch. 40S, Dims to ASME B36.19 |
MTR |
120 |
|
Pipe 12" |
Super Duplex Pipe ANSI/ASME B36.19M SCH10 12'' ASTM A790 UNS S32750 |
MTR |
108 |
|
Pipe 12" |
Pipe, BE, Welded [EFsW], SDSS, A928 UNS S32750 Cl. 5, Sch. 40S, Dims to ASME B36.19 |
MTR |
60 |
Why Super Duplex 2507 (UNS S32750 / 1.4410)
Super Duplex 2507 combines the advantages of both austenitic and ferritic stainless steels. With a PREN of ≥42 and a minimum yield strength of 550 MPa, it offers exceptional resistance to chloride pitting, crevice corrosion and stress corrosion cracking - making it the material of choice for aggressive offshore seawater, marine engineering, desalination and oil & gas service.
|
Property |
Super Duplex 2507 (UNS S32750 / 1.4410) |
|
Material type |
Ferritic-austenitic (duplex) stainless steel, ~50/50 phase |
|
Pitting Resistance (PREN) |
≥ 42 (seawater pitting threshold = PREN > 40) |
|
Critical Pitting Temp (CPT) |
50–60°C (ASTM G150) |
|
Tensile Strength, min |
795 MPa (115 ksi) |
|
Yield Strength, min |
550 MPa (80 ksi) - ≈ 3.2× 316L |
|
Elongation / Hardness |
15% min / 319 HBW max |
|
Standards |
ASTM A790 (Smls), A928 Cl.5 (Welded), A789 (Tube), A182 F53 (Flange) |
|
Bare service life |
25+ years in chlorinated seawater, no coating / CP required |
Quality & Logistics
Certified chemistry & PREN: every heat verified for Cr/Mo/N with computed PREN ≥ 42.
Phase balance: ferrite content controlled at 35–65% to guarantee weldability and SCC resistance.
Full standard coverage: A790 (Smls), A928 Cl.5 (Welded), A789 (Tube), A182 F53 (Flange) & A815 (Fittings).
Export-ready packing: end caps, woven belts, seaworthy wooden cases, and clear marking per client spec.
About Henan Shuangzhong Intelligent Technology Co. , Ltd.
Henan Shuangzhong Intelligent Technology Co. , Ltd. is a well-known stockist and exporter of duplex and super duplex stainless steel. We are an S32750 / 1.4410 material supplier with 15+ years of export experience. We not only provide pipes, plates and round bars, but also pipe fittings, flanges and custom fabrication. Contact us for specifications, mill certificates and competitive pricing.
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