DN150 STD Duplex Stainless Steel ASTM A790 S32750 (2507) Pipe

Product Name

S32750 / 2507 Seamless Super Duplex Stainless Steel Pipe
ASTM A789 S32750 seamless pipe, UNS S32750 super duplex pipe, 2507 super duplex stainless steel seamless tube, Alloy 2507 F53 pipe, 1.4410 seamless super duplex tube, super duplex pipe for seawater, S32750 heat exchanger tube, NACE MR0175 duplex pipe

Product Overview

UNS S32750 (2507, W.Nr. 1.4410): Super duplex stainless steel with 25% Cr, 7% Ni, 4% Mo. Balanced ferrite–austenite microstructure delivers high strength  and outstanding corrosion resistance.  
S32750 pipe: Engineered for severe environments—high chloride, high temperature, high pressure. Outperforms 316L, 317L, and 2205 in pitting, crevice, and stress corrosion cracking resistance.

Process

Seamless, formed through cold rolling or cold drawing, without weld seams, and with high structural uniformity.

Company

Wenzhou Guohao Steel Co., Ltd. — Manufacturer and Exporter of Stainless Steel and Super Duplex Stainless Pipe
• Tax ID: 91330303679583678U             • Special Equipment Manufacturing License No.: TS2733T07–2029

Grade

DUPLEX SS 2507/F53 / Alloy 32750 / Alloy 2507
ASTM:  2507 (UNS S32750)
EN: 1.4410 (X2CrNiMoN25-7-4)
GB: S25073 (022Cr25Ni7Mo4N)
GOST:32HCRNiMoN25-6-3

Standard

• ASTM A790 / ASME SA790,ASTM A789 / ASME SA789
• EN 10216-5
• GB/T 21833-2008,GB/T 14976-2012
• GOST 9941-22

Specification

Outer Diameter (OD):6 mm-630 mm ; 1/8 inch-24 inch (Custom sizes available)

Wall Thickness (WT): 0.89mm-80mm (SCH 10S, SCH 40S, SCH 80S, SCH 160, SCH XXS)

Length (L):Fixed length 6m / Random length / Customized length

Pipe End

Plain End (PE) ;Beveled End (BE)

Surface Treatment

Acid Pickling; Polishing; Bright Annealing; Sand Blasting; Shot Blasting / Shot Peening

Testing & Quality Control

Every batch of S32750 super duplex pipes undergoes strict full inspection before delivery:
PMI Positive Material Identification
Chemical composition spectroscopic analysis
Mechanical property test (tensile, hardness, elongation)
Hydrostatic pressure test / Air pressure test
UT Ultrasonic flaw detection
Eddy current testing
Dimension & visual surface inspection

Weight Per Meter

2507 (S32750) density 7.8 g/cm³
2057 Duplex Stainless Steel Pipe Weight Calculation Formula=(OD-THK)*THK*0.02450 kg/m

Pipe's Markings

GH-STEEL SML PIPE ASTM A790 UNS S32750 DN 60 SCH40S  HEAT/LOT NO:

Value Added Services

Customize Length  Cutting; Bending; Polishing (180#,240#,320#,400#,600#); Shot Blasting / Shot Peening; Drilling/Punching; Oil Degreasing; Print Colour Code

Delivery Time

For ready stock :7 days ;For MTO: 30 days

2507 Core Product Features & Performance

• Superior chloride resistance: PREN ≥42 Resists pitting, crevice, and stress corrosion cracking in seawater, brine, and chloride-rich industrial media.  
• High strength and rigidity: Ideal for high-pressure, high-temperature, and heavy-load piping.  
• Excellent uniform corrosion resistance: Stable in acidic, alkaline, and saline environments.  
• Good erosion–abrasion resistance: Handles slurries and particle-laden flows.  
• Long service life: Low maintenance and high durability in harsh conditions.

2507 Applications

S32750 / 2507 super duplex stainless steel pipe is widely applied in extreme corrosive industrial fields:
• Offshore oil & gas platforms, subsea pipeline systems
• Seawater desalination, seawater cooling and water injection systems
• Power plant FGD (Flue Gas Desulfurization) systems
• Chemical & petrochemical processing, acid medium transportation
• Pulp & paper bleaching production lines
• Marine engineering, coastal industrial facilities
• Wastewater treatment and salt chemical industry

Super duplex UNS S32750 (2507) is a high-alloy duplex stainless steel with roughly equal austenite and ferrite phases. It delivers high yield strength, exceptional resistance to pitting, crevice corrosion, and stress-corrosion cracking—outperforming conventional austenitic steels. Its composition makes it ideal for aggressive chloride environments, including offshore oil and gas, desalination, and chemical processing.

Super duplex UNS S32750 (2507) Duplex stainless steel Application
Super duplex stainless steel S32750 is preferred for seawater applications over standard duplex grades like S32205.And S32507 due to its higher pitting resistance—evidenced by a PRE number >40. Its superior resistance to pitting, crevice corrosion, and stress corrosion cracking makes it widely used in chemical processing, pharmaceuticals, pulp and paper, seawater systems, and flue gas desulfurization.

The Chemical Composition (wt.%) of S32750,S25073,1.4410 Duplex Stainlesss Steel Seamless Tube/Pipe
PREN Value: ≥ 40 (Excellent anti-pitting performance for seawater and chloride media)

Grade

C (max)

Mn (max)

P (max)

S (max)

Si (max)

Cr

Ni

Mo

Others

2507
UNS S32750

0.030

1.20

0.035

0.020

0.80

24.0~26.0

6.0~8.0

3.0~5.0

N:0.24~0.32
Cu≤0.5

S25073
(022Cr25Ni7Mo4N)

0.030

1.20

0.035

0.015

0.80

24.0~26.0

6.0~8.0

3.0~5.0

N:0.24~0.32
Cu≤0.5

1.4410 (X2CrNiMoN25-7-4)

0.030

2.00

0.035

0.015

1.00

24.0~26.0

6.0~8.0

3.0~4.5

N:0.20~0.35

The Mechanical Properties of S32750,S25073,1.4410 Duplex Stainlesss Steel Seamless Tube/Pipe

Grade

Tensile Strength, Min

Yield Strength, Min

Elognation

Hardness  (max)

2507 (UNS S32750)

800 Mpa

550 Mpa

15%

310 HBW / 32 HRC

S25073 (022Cr25Ni7Mo4N)

800 Mpa

550 Mpa

15%

310 HBW / 32 HRC

1.4410 (X2CrNiMoN25-7-4)

800~1000 Mpa

550 Mpa

20%

-

Equivalent Grade of S32750:

USA (ASTM)

EU (EN)

Russia (GOST)

Japan (JIS)

China (GB)

2507
(S32750)

1.4410 (X2CrNiMoN25-7-4)

32HCRNiMoN25-6-3

SUS32750

S25073  (022Cr25Ni7Mo4N)

A269 A213 A312 A789 A790 GOST9941-2022  EN10216-5 Standard Dimensional Tolerance for S32750 Duplex Stainless Steel Seamless Tube Pipe

Standard

Outside Diameter Tolerance(mm)

Thickness Tolerance

Length Tolerance (mm)

ASTM A790

10.29≤D≤48.26

+0.4/-0.8

10.3≤T≤73

T:+20%/ -12.5%

L:+6/-0

88.9≤T≤457 T/D≤5%

T:+22.5%/-12.5%

48.26<D≤114.3

±0.80

88.9≤T≤457 T/D>5%

T:+15%/-12.5%

114.3<D≤219.1

+1.6/-0.8

508above T/D<5%

T:+22.5%/-12.5%

219.1<D≤457.2

+2.4/-0.8

508above T/D>5%

T:+15%/-12.5%

ASTM A789

D<12.7

±0.13

T:±15%

L:+3.2/-0
L:+4.8/-0

12.7<D≤38.1

±0.13

T:±10%

38.1<D≤88.9

±0.25

88.9<D≤139.7

±0.38

139.7<D≤203.2

±0.76

EN10216-5

D3

±0.75%/±0.30

T3

T:±10%/ ±0.20mm

L≤6m,+5/-0
6<L≤12m,+10/-0

D4

±0.5%/±0.10

T4

T:±7.5% / ±0.15mm

GOST 9941-2022
(except 06XH28MAT)

D<10

Normal:±0.30
High:±0.20
Higher:±0.15

T<0.3

Normal:±0.05 mm
High:±0.03 mm

L:+15/-0

10<D≤30

Normal:±0.40
High:±0.30
Higher:±0.20

0.3<T≤0.4

Normal:±0.07 mm
High:±0.05 mm

30<D≤95

Normal:±1.2%
High:±1%
Higher:±0.8%

0.4<T≤0.6

Normal:±0.10 mm
High:±0.07 mm

0.6<T≤1.0

Normal:±0.15 mm
High:±0.10 mm

D>95  
D/S<40

Normal:±1.2%
High:±1%
Higher:±0.8%

1<T≤3
D/S<40

Normal:+12.5%/-15%
High:+12.5%/-10%
Higher:±10%

3<T≤7
D/S >40

Normal:+12.5%/-15%
High:±12.5%

D>95  
D/S >40

Normal:±1.5%
High:±1.2%
Higher:±1.0%

T>7
D<325

Normal:+12.5%/-10%
High:±10%

T>7
D>325

Normal:+12.5%/-15%
High:±12.5%

GB/T 21833-2020

6≤D≤10

Normal:±0.2%
High:±0.15%

T≤3.0

Normal:±12%
High:±10%

L:+10/-0

10<D≤30

Normal:±0.3%
High:±0.2%

30<D≤50

Normal:±0.4%
High:±0.3%

T>3.0

Normal:+12.5%/-10%
High:±10%

50<D≤219

Normal:±0.85%
High:±0.75%

D>219

Normal:±0.9%
High:±0.8%