What is 1.4507 Cold-Rolled Stainless Steel Bar?
1.4507 cold-rolled stainless steel bar contains 15.0%–17.5% chromium, 3.0%–5.0% nickel, and 3.0%–5.0% copper. Following cold rolling and subsequent age hardening, it achieves a hardness of 40–45 HRC and exhibits excellent strength and toughness, along with moderate corrosion resistance. It is widely used in high-precision mechanical components, such as aerospace structural parts, medical surgical instruments, and chemical valve stems.
Ferralium 255 | EN 1.4507 Round Bar Supplier
GNEE has over 18 years of experience in exporting stainless steel. We supply 1.4507 Cold-Rolled Stainless Steel Bars compliant with standards such as EN 10088, ASTM A276, and ASTM A479. We offer round bars, square bars, hexagonal bars, and custom processing services. Our standard diameters range from 6 mm to 300 mm. We support solution treatment, precision cold drawing, turning, polishing (Bright), black finish, and cutting services. Dimensional tolerances can reach h9/h11, and we also provide CNC deep processing based on drawings.
For UNS S32550 cold-rolled bars, we can provide a stress-relief annealing process according to customer requirements. This process reduces residual stresses from cold working while preventing any negative impact on corrosion resistance and dimensional accuracy.
The 1.4507 Cold-Rolled Stainless Steel Bars provided by GNEE are delivered in a solution-annealed + rapid water-quenched condition. We strictly control the solution temperature and cooling rate to prevent the precipitation of harmful intermetallic phases (such as the σ sigma phase and χ chi phase). This ensures a stable balance in the dual-phase microstructure, significantly enhancing resistance to pitting, crevice corrosion, and chloride stress corrosion cracking-far exceeding that of 2205 duplex steel and standard 304 or 316L. It can withstand long-term erosion from seawater, brine, and desulfurization acid media, making it ideal for high-load, corrosive components such as pump shafts, valve stems, and marine fasteners.
Ferralium 255 Bars Sizes And Specifications
| Grade | 2507Cu |
| Specification | EN, DIN, JIS, ASTM, BS, ASME, AISI, ISO |
| Standard | ASTM A276/ASME SA276, ASTM A479/ASME SA479 & ASTM A164/ASME SA164 . |
| Stainless steel round Bar | Diameter: 2mm - 600mm |
| Stainless steel bright Bar | Diameter: 2mm - 600mm |
| Stainless steel hex Bar | Dimension: 6mm - 80mm |
| Stainless steel square bar | Dimension: 3.0 - 180mm |
| Stainless steel flat bar | Thickness: 0.5mm - 200mm, Width: 1.5mm - 250 mm |
| Stainless steel angle bar | as requirements |
| Length | Normally 6m, or produce as requirements |
| Surface | Black, Bright. Peeled and Polished, Solution annealed. |
| Delivery condition | cold drawn, hot rolled, forged, grinding, centerless grinding |
| Tolerance | H8, H9, H10, H11, H12, H13,K9, K10, K11, K12 or as per clients' requirements |
Ferralium 255 Bars Chemical Composition
| Element | Si | C | Mn | S | P | Cr | Mo | Ni | Cu | PREN | N |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Max | 1.00 | 0.04 | 1.50 | 0.030 | 0.040 | 27.00 | 3.90 | 6.50 | 2.50 | - | 0.25 |
| Min | - | - | - | - | - | 24.00 | 2.90 | 4.50 | 1.50 | 40.00 | 0.10 |
Super Duplex Steel Ferralium 255 bar Mechanical Properties
| °C | Rp 0.2 MPa | Rp 1.0 MPa | Rm MPa | °F | YS 0.2% KSI | YS 1.0% KSI | UTS KSI | A/El% |
| 20 | 550 | 570 | 770 | 68 | 78 | 83 | 111 | 25 |
| 100 | 485 | 500 | 700 | 212 | 70 | 72 | 102 | 25 |
| 250 | 400 | 420 | 640 | 500 | 57 | 61 | 92 | 25 |
Alloy F255 Hex Bars Equivalent
| UNS | WERKSTOFF NR. |
|---|---|
| S32550 | 1.4507 |
What material is 1.4507 equivalent to?
Material 1.4507 (X2CrNiMoCuN25-6-3) is a high-alloy super duplex stainless steel. Corresponding designations under various international standards and trade names include UNS S32550, ASTM A182 Grade F61, and the trade names Ferralium 255 and Alloy F255.
| Grade | EN | ASTM/UNS | |
| UR2507Cu | 1.4507 | X2CrNiMoCuN 25-6-3 | S32520/32550 |
Ferralium 255 bar applications:
Chemical processing: Equipment for handling sulfuric, nitric, and phosphoric acids;
Oil and gas industry: Pumps, valves, and shaft components for offshore and subsea environments;
Marine and coastal engineering: Propeller shafts, desalination plants, and seawater piping systems.
Quality Control
All products come with an EN 10204 3.1 Material Test Certificate (MTC) and support PMI (Positive Material Identification), UT (Ultrasonic Testing), dimensional and surface inspections, as well as third-party inspections by SGS, BV, or TÜV.
Packaging
We utilize anti-rust packaging, wooden crates, and export-grade pallets. With typical delivery times of 7–15 days, we help global customers reduce procurement risks and shorten lead times, ensuring the long-term, stable operation of critical corrosion-resistant engineering projects.
If you are considering 1.4507 for a project, tell me:What specific environment or chemical will the bar be exposed to?What diameter or dimensions do you need?I can help you narrow down whether this is the optimal grade or suggest similar super duplex and duplex alternatives.
FAQ
What precautions should be taken when welding 1.4507 bars?
Due to its high strength and tendency toward work hardening, the use of coated carbide tools and lower cutting speeds is recommended. When welding, compatible super duplex stainless steel filler materials (such as ER2594) should be used, and the interpass temperature must be strictly controlled (typically recommended to be below 150°C) to prevent embrittlement of the heat-affected zone.
What is the difference between 1.4507 and 2205 duplex steel?
1.4507 is classified as a "super duplex stainless steel" and possesses a higher PREN value (Pitting Resistance Equivalent Number > 40), whereas 2205 typically has a value of around 35. Notably, 1.4507 contains an addition of 1.5%–2.5% copper (Cu), which significantly enhances its corrosion resistance in environments containing strong reducing acids such as sulfuric acid and phosphoric acid, making it an upgraded alternative to 2205.
What is the difference between 1.4507 and 14404?
1.4507 and 1.4404 are two distinct grades of stainless steel defined by the European EN standard. The primary difference is that 1.4404 is an austenitic steel (often known as 316L) used for general corrosion resistance and welding, while 1.4507 is a highly alloyed super duplex steel built for extreme strength and harsh, chloride-rich environments.