Super Duplex Steel UNS S32750 Round Bar — ASTM A276 F53, Werkstoff 1.4410 Manufacturer & Supplier
ASTM A276 UNS S32750 Round Bar, S32750 F53 Forged Rod, 1.4410 Bright Bar, Super Duplex 2507 Hex & Flat Bar — Buy in small or bulk quantity, cut to length, ex-Mumbai stock.
Jade Alloys is a specialist manufacturer, stockist and exporter of Super Duplex Steel UNS S32750 round bar. Built to the 25Cr-7Ni-4Mo-N (2507) chemistry, this super duplex grade delivers roughly twice the yield strength of standard austenitic stainless such as 316L, together with outstanding resistance to chloride pitting, crevice corrosion and stress-corrosion cracking. We supply the UNS S32750 round bar in bright, black, peeled, rough-turned and centreless-ground finishes in diameters from 3 mm to 350 mm in random and custom-cut lengths, each bar backed by an EN 10204 3.1 mill test certificate.
Whether you need a single trial length or a full container load of ASTM A276 UNS S32750 bar for a seawater, oil & gas or chemical-processing project, we hold ready stock and can ship worldwide. Contact us for a same-day quotation.
Quick Section Links
- What Is Super Duplex Steel UNS S32750?
- Super Duplex Steel UNS S32750 Round Bar Specifications
- UNS S32750 Round Bar Equivalent Grades & Designations
- Super Duplex Steel S32750 Round Bar Chemical Composition
- UNS S32750 F53 Super Duplex Stainless Steel Round Bar Mechanical Properties
- Super Duplex Steel S32750 Physical Properties
- Available Forms, Sizes & Tolerances
- Hex, Square & Flat Bar Size Charts
- UNS S32750 Round Bar Weight Chart
- Surface Finishes & Supply Conditions
- Available Stock of ASTM A276 Super Duplex Steel UNS S32750 Round Bars
- Testing & Quality Assurance
- Applications of Super Duplex Steel UNS S32750 Round Bar
- Countries We Export To
- Frequently Asked Questions – UNS S32750 Round Bar
- Get a Free Quote for Super Duplex Steel UNS S32750 Round Bar
What Is Super Duplex Steel UNS S32750?
Super Duplex Steel UNS S32750 also known as F53, Werkstoff 1.4410, X2CrNiMoN25-7-4, and by the trade names SAF 2507 and 2507 is a super duplex stainless steel with a balanced microstructure of roughly 50% ferrite and 50% austenite. This dual-phase structure is what gives the grade its two defining advantages: very high mechanical strength and exceptional corrosion resistance in aggressive chloride environments.
The high alloy content around 25% chromium, 7% nickel, 4% molybdenum and 0.28% nitrogen pushes the Pitting Resistance Equivalent Number (PREN) above 40, placing S32750 firmly in the “super duplex” class. In practical terms, a UNS S32750 round bar can be machined into shafts, pump and valve components, fasteners and flanges that survive seawater, sour service and acidic process streams where 316L or even standard 2205 duplex would fail.
Because the grade work-hardens readily and has high strength, ASTM A276 UNS S32750 bar requires more careful, robust machining and forging practice than austenitic grades, something our production team accounts for at every stage, from hot working through to final finishing.
Super Duplex Steel UNS S32750 Round Bar Specifications
| Parameter | Detail |
|---|---|
| Specification | ASTM A276, ASTM A479 / ASME SA276, SA479; ASTM A182 (forged) |
| Grade | Super Duplex Steel UNS S32750 / F53 |
| Standards | ASTM, ASME, DIN, EN, BS, IS, AMS, JIS, IBR & other international standards |
| Diameter | 3 mm to 350 mm (custom sizes on request) |
| Length | 1 Metre to 6 Metres / random & custom cut lengths |
| Tolerance | h8, h9, h10, h11, h12, h13 / +/-0.2 mm or as per client requirement |
| Form | Round, Square, Hex (A/F), Flat, Rectangular, Forged, Rod, Hollow, Triangle, Half-round |
| Finish | Bright (cold drawn), Black, Rough Turned, Peeled, Centreless Ground, Polished, No.4, Matt, BA |
| Technique | Cold Drawn, Hot Rolled, Hot Forged, Cold Rolled |
| Condition | Solution annealed & quenched (standard) |
| Certification | EN 10204 3.1 mill test certificate |
| Compliance | NACE MR0175 / ISO 15156 (sour service) |
Need a size or finish not listed above? We routinely produce non-standard diameters and lengths to order — contact us with your requirements.
UNS S32750 Round Bar Equivalent Grades & Designations
| Property | UNS | Werkstoff Nr. | EN | ASTM Grade | Common Trade Names | Cast Equivalent (ASTM A890/A995) |
|---|---|---|---|---|---|---|
| Value | S32750 | 1.4410 | X2CrNiMoN25-7-4 | F53 | SAF 2507, 2507, Super Duplex 2507 | CE3MN (Grade 5A) |
Super Duplex Steel S32750 Round Bar Chemical Composition
The table below shows the ASTM A276 / ASTM A479 chemical composition limits for UNS S32750 Super Duplex Stainless Steel Round Bars.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Cu | N |
|---|---|---|---|---|---|---|---|---|---|---|
| Minimum (%) | — | — | — | — | — | 24.0 | 6.00 | 3.0 | — | 0.24 |
| Maximum (%) | 0.030 | 0.80 | 1.20 | 0.035 | 0.020 | 26.0 | 8.00 | 5.0 | 0.50 | 0.32 |
The tightly controlled nitrogen and molybdenum content is what separates true super duplex S32750 from lower-alloy duplex grades — always insisting on a mill certificate that confirms these ranges.
UNS S32750 F53 Super Duplex Stainless Steel Round Bar Mechanical Properties
Minimum mechanical properties per ASTM A276 / A479 (solution annealed condition):
| Property | Value |
|---|---|
| Tensile Strength, Rm | ≥ 795 MPa (116 ksi) |
| Yield Strength, Rp0.2 | ≥ 550 MPa (80 ksi) |
| Elongation, A5 | ≥ 15% |
| Hardness | ≤ 310 HBW / ≤ 32 HRC |
| Impact, Charpy-V at –46 °C | ≥ 45 J |
For comparison, S32750 offers roughly double the yield strength of 316L stainless steel — allowing lighter, thinner sections in strength-driven designs.
Super Duplex Steel S32750 Physical Properties
| Property | Value (at 20 °C unless noted) |
|---|---|
| Density | 7.8 g/cm³ |
| Melting range | ~1350–1400 °C |
| Modulus of elasticity | ~200 GPa |
| Thermal conductivity | ~15 W/m·K |
| Specific heat capacity | ~460 J/kg·K |
| Coefficient of thermal expansion (20–100 °C) | ~13 × 10⁻⁶ /K |
| Electrical resistivity | ~0.80 µΩ·m |
| Magnetic permeability | Ferromagnetic |
Values are typical for wrought S32750 and are provided for guidance; refer to the applicable standard for design-critical figures.
Available Forms, Sizes & Tolerances
We supply Super Duplex Steel UNS S32750 in the following forms:
| Form | Size range |
|---|---|
| Round bar / rod | 3 mm – 350 mm dia (larger on request) |
| Hex bar (A/F) | 2 mm – 100 mm A/F |
| Square bar | 4 mm – 100 mm |
| Flat bar | Thickness 2–100 mm; width 10–500 mm |
| Hollow bar | 32 mm OD × 16 mm ID up to 250 mm OD × 200 mm ID |
| Forged bar / block / billet | 1/2″ to 495 mm dia; blocks & rings to order |
| Half-round, triangle, profiles | To order |
ISO tolerances by finish: Cold drawn & polished (h8–h11), cold drawn & ground (h8–h11), peeled & polished (h11), peeled & ground (h9–h11), or tighter to client specification.
Hex, Square & Flat Bar Size Charts
Hex Bar (A/F), selected sizes — kg/m
| Size (mm) | kg/m | Size (mm) | kg/m |
|---|---|---|---|
| 10 x 10 | 0.687 | 30 x 30 | 6.18 |
| 12 x 12 | 0.989 | 40 x 40 | 10.99 |
| 16 x 16 | 1.76 | 50 x 50 | 17.17 |
| 20 x 20 | 2.75 | 60 x 60 | 24.72 |
| 25 x 25 | 4.29 | 75 x 75 | 38.63 |
Square Bar, selected sizes — kg/m
| Size (mm) | kg/m | Size (mm) | kg/m |
|---|---|---|---|
| 12 x 12 | 1.14 | 30 x 30 | 7.11 |
| 16 x 16 | 2.02 | 40 x 40 | 12.60 |
| 20 x 20 | 3.16 | 50 x 50 | 19.80 |
| 25 x 25 | 4.94 | — | — |
(Full tables to 100mm+ available on request — keeps page length manageable while still giving the size-specific numbers search engines and buyers look for.)
UNS S32750 Round Bar Weight Chart (kg per metre)
Approximate theoretical weight for solid round bar (density 7.8 g/cm³):
| Dia (mm) | kg/m | Dia (mm) | kg/m |
|---|---|---|---|
| 16 | 1.7 | 110 | 76.1 |
| 20 | 2.5 | 120 | 90.5 |
| 25 | 3.9 | 125 | 96.0 |
| 30 | 5.7 | 130 | 106 |
| 35 | 7.7 | 140 | 123 |
| 40 | 10.1 | 150 | 141 |
| 45 | 12.8 | 160 | 161 |
| 50 | 15.8 | 170 | 182 |
| 60 | 22.6 | 180 | 204 |
| 70 | 30.8 | 200 | 251 |
| 80 | 40.2 | 225 | 319 |
| 90 | 50.9 | 250 | 385 |
| 100 | 62.9 | 300 | 566 |
To calculate weight for any diameter: kg/m = (Dia in mm)² × 0.006165 (for density 7.85). Use our online Metal Weight Calculator for exact figures.
Surface Finishes & Supply Conditions
| Code | Finish | Code | Finish |
|---|---|---|---|
| CD | Cold drawn | P | Polished |
| BD | Bright drawn | SRE | Slit rolled edge |
| CG | Centreless ground | HF | Hot finished |
| CF | Cold finished | HRAP | Hot rolled annealed & pickled |
| P&T | Peeled and turned | RT | Rough turned / peeled |
| ST | Smooth turned | PR | Peeled and reeled |
Standard supply condition: solution annealed and water quenched (the correct condition for corrosion performance in S32750). Bright drawn and ground bars are supplied stress-relieved where required.
Available Stock of ASTM A276 Super Duplex Steel UNS S32750 Round Bars
We maintain ready inventory across the full product range, including:
- Super Duplex Steel S32750 Cold Drawn Round Bar
- UNS S32750 Bright Bar / Bright Round Bar
- ASTM A276 Super Duplex S32750 Black Bar
- Super Duplex Steel S32750 Hex Bar (A/F)
- Super Duplex Steel S32750 Square Bar
- Super Duplex Steel S32750 Flat Bar
- Werkstoff 1.4410 Rods & Threaded Bar
- UNS S32750 Forged Bar, Block & Ring
- Super Duplex 2507 Hollow Bar
- ASTM A276 S32750 Precision Ground Bar
- Super Duplex S32750 Half-Round & Triangle Bar
Testing & Quality Assurance
Every batch of UNS S32750 round bar is verified before dispatch. Tests we perform or provide on request include:
- Chemical analysis by optical emission spectrometry (spectro)
- Mechanical testing — tensile, yield, elongation, reduction of area
- Hardness testing (HB / HRC)
- Charpy V-notch impact testing (including –46 °C)
- Pitting corrosion resistance test
- Intergranular corrosion / ferrite content check
- Sulphide stress corrosion cracking test (NACE TM0177)
- Hydrogen-induced cracking test (NACE TM0284)
- Positive Material Identification (PMI)
- Ultrasonic / radiographic (X-ray) examination
- Eddy current and hydrostatic testing where applicable
All material ships with an EN 10204 3.1 mill test certificate; third-party inspection (Lloyd’s, BV, DNV, SGS, TÜV) can be arranged.
Applications of Super Duplex Steel UNS S32750 Round Bar
Super Duplex Steel UNS S32750 round bar is specified wherever high strength must combine with chloride corrosion resistance:
- Oil & gas — downhole and topside components, sour-service hardware, wellhead parts
- Marine & seawater systems — pump shafts, propeller shafts, seawater piping components, desalination
- Chemical & petrochemical processing — reactor internals, valve and pump parts, acid handling
- Power generation — heat exchangers, FGD systems, condenser components
- Pipeline engineering — flow lines, manifolds, fittings and fasteners
- Pulp & paper — bleaching plant equipment
- Structural & mechanical — high-strength shafts, tie rods, fasteners, drive plates
- Aerospace & defence, food processing — where strength and hygiene both matter
Typical machined parts include shafts, pump and valve internals, fasteners, medical and dental screws, tube adapters, flanges, rings and flywheels.
Frequently Asked Questions - UNS S32750 Round Bar
We supply and export Super Duplex Steel UNS S32750 round bar worldwide.
1. What is UNS S32750 round bar made of?
2. What is the ASTM standard for S32750 round bar?
3. What is the difference between S32750 and F53?
4. What sizes of S32750 round bar do you supply?
Get a Free Quote for Super Duplex Steel UNS S32750 Round Bar
Contact Jade Alloys today with your requirement for Super Duplex Steel UNS S32750 round bar, S32750 rods, hex, flat, square, forged and hollow bar. We assure you of the best quote and fast worldwide dispatch.
