Project Description
04Cr13Ni5Mo (S41500 / X3CrNiMo13-4 / 1.4313) Stainless Steel Seamless Tube
04Cr13Ni5Mo — also designated as S41500 (UNS 41500) under ASTM, SUSF6NM under JIS, and X3CrNiMo13-4 / 1.4313 under EN — is a low-carbon martensitic stainless steel engineered for applications demanding high strength combined with superior toughness and corrosion resistance. Unlike conventional martensitic grades such as 410, the reduced carbon content and deliberate additions of nickel (3.5–5.5%) and molybdenum (0.50–1.00%) give this grade outstanding weldability, resistance to cavitation erosion, and reliable performance in mildly corrosive environments including fresh water, steam, and neutral chloride-bearing media.
At Fushun Steel Tube, we manufacture 04Cr13Ni5Mo seamless tubes through hot-rolling followed by cold-drawing or cold-rolling for precision applications. Each tube is heat-treated to exacting parameters — typically QT — and undergoes comprehensive non-destructive and destructive testing before shipment. Whether your specification calls for ASTM A182 F6NM, EN 10088-3 1.4313, or GB/T 4237 04Cr13Ni5Mo, we deliver tubes that meet the full range of international standards. Contact us for a free quote on your next project.
Applications
The unique combination of high tensile strength (≥790 MPa), good ductility (≥15% elongation), and resistance to cavitation and pitting corrosion makes 04Cr13Ni5Mo / S41500 seamless tubes an ideal choice for components that operate under cyclic loading in wet or mildly corrosive environments. Typical downstream applications include:
- Hydraulic turbine components — runner blades, shaft sleeves, guide vanes, and wicket gates in Francis, Kaplan, and Pelton turbines, where resistance to cavitation erosion is critical
- Pump shafts and impellers — vertical and horizontal pump shafts, multistage pump impellers, and compressor rotors in water handling, chemical transfer, and power generation service
- Marine propeller shafts and stern tubes — propulsion shafting for vessels operating in fresh and coastal waters
- Valve stems and trim components — gate, globe, and check valve internals in power plants and water treatment facilities
- Offshore platform structural components — tension members, braces, and subsea equipment housings
- Chemical and petrochemical process equipment — heat exchanger tubes, reactor internals, and piping for moderate-temperature, moderate-corrosion service
For OEMs and service centers, we also supply 04Cr13Ni5Mo round bars and forgings in matching heat treatment conditions for integrated manufacturing workflows. Tell us your specifications and we will provide a tailored proposal.
Specifications & Standards
04Cr13Ni5Mo / S41500 is covered by multiple international standards spanning plates, bars, forgings, and tubes. Fushun Steel Tube manufactures seamless tubes to the following specifications, with full traceability and certification:
Tube & Pipe Standards
- EN 10297-1 — Seamless circular steel tubes for mechanical and general engineering purposes — covers grade X3CrNiMo13-4 (1.4313)
- EN 10216-5 — Seamless steel tubes for pressure purposes — Stainless steel tubes — applicable for pressure-bearing 1.4313 components
- ASTM A519 — Seamless carbon and alloy steel mechanical tubing — Grade 415 / S41500 supplied to customer-specified mechanical property requirements
- DIN 2391-2 — Seamless precision steel tubes — Technical delivery conditions — for cold-drawn/cold-rolled precision tubes in 1.4313
- Customer-specific specifications — We manufacture to proprietary or project-specific tube specifications upon request
Related Material Standards
- ASTM A182 / A182M — Forged or rolled alloy and stainless steel pipe flanges, fittings, and valves — Grade F6NM (S41500), Classes 1, 2, and 3
- ASTM A240 / A240M — Chromium and chromium-nickel stainless steel plate, sheet, and strip — UNS S41500
- ASTM A276 / A276M — Stainless steel bars and shapes — UNS S41500
- ASTM A479 / A479M — Stainless steel bars and shapes for use in boilers and pressure vessels — UNS S41500
- EN 10088-3 — Stainless steels — Technical delivery conditions for semi-finished products, bars, rods, and wire rod — Grade X3CrNiMo13-4 (1.4313)
- GB/T 4237 — Hot-rolled stainless steel plate, sheet, and strip — Grade 04Cr13Ni5Mo
- GB/T 3280 — Cold-rolled stainless steel plate, sheet, and strip — Grade 04Cr13Ni5Mo
- GB/T 1220 — Stainless steel bars — Grade 04Cr13Ni5Mo
- JIS G4303 / G3214 — Stainless steel bars and forgings — Grade SUSF6NM
Available Sizes & Delivery
| Manufacturing Process | Outer Diameter (mm) | Wall Thickness (mm) | Length (m) |
|---|---|---|---|
| Hot-Rolled Seamless | 32 – 530 | 2.5 – 50 | 5.8 – 12 (fixed or random) |
| Cold-Drawn Seamless | 6 – 120 | 1 – 12 | Up to 15 (fixed length) |
| Cold-Rolled Precision | 6 – 89 | 0.5 – 8 | Up to 12 (fixed length) |
- Ready Stock
- Common sizes and grades in inventory ship within approximately 7 working days.
- Custom Orders
- Non-standard dimensions and special grades: MOQ 2–3 tons, delivery within 25–35 working days. Small trial orders are accepted for grade qualification purposes.
- Volume Orders
- Pricing and delivery terms are negotiable. Contact our sales team for a volume quotation.
For precision applications requiring tight tolerances, explore our cold-drawn steel tube and cold-rolled steel tube capabilities.
Chemical Composition
The chemical composition of 04Cr13Ni5Mo / S41500 / X3CrNiMo13-4 is tightly controlled to ensure consistent mechanical properties and corrosion resistance. The table below shows the specified ranges under each standard. Note that the Chinese GB standard imposes a stricter carbon maximum (≤0.04%) than ASTM or EN (≤0.05%), and the EN standard specifies a narrower molybdenum range of 0.30–0.70% versus 0.50–1.00% under ASTM and GB.
| Element | ASTM S41500 (A182 F6NM) | GB 04Cr13Ni5Mo (GB/T 4237) | EN X3CrNiMo13-4 (1.4313 / EN 10088-3) |
|---|---|---|---|
| Carbon (C) | ≤ 0.05 | ≤ 0.04 | ≤ 0.05 |
| Silicon (Si) | ≤ 0.60 | ≤ 0.60 | ≤ 0.70 |
| Manganese (Mn) | 0.50 – 1.00 | 0.50 – 1.00 | ≤ 1.50 |
| Phosphorus (P) | ≤ 0.030 | ≤ 0.030 | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 | ≤ 0.015 |
| Chromium (Cr) | 11.5 – 14.0 | 12.0 – 14.0 | 12.0 – 14.0 |
| Nickel (Ni) | 3.5 – 5.5 | 3.5 – 5.5 | 3.5 – 5.5 |
| Molybdenum (Mo) | 0.50 – 1.00 | 0.50 – 1.00 | 0.30 – 0.70 |
| Nitrogen (N) | — | — | ≥ 0.015 |
Fushun Steel Tube's in-house steelmaking capability — EAF + LF + VD, with optional ESR or VIM+VAR upgrades — ensures precise control over alloying elements and low inclusion content, producing clean steel with uniform properties throughout each tube.
Manufacturing Process
Production of 04Cr13Ni5Mo seamless tubes begins with our EAF + LF + VD steelmaking route, which achieves precise chemistry control and low gas content. For critical applications — such as turbine shafts or subsea components — we offer upgraded melting via ESR or VIM+VAR to further reduce inclusions and improve homogeneity. The molten steel is continuously cast into rounds, which are then pierced and hot-rolled on a retained-mandrel mill or Assel mill to produce mother tubes. These are subsequently cold-drawn or cold-rolled to achieve the required final dimensions, surface finish, and mechanical properties. Each tube receives the specified heat treatment — typically austenitizing at 950–1050 °C followed by oil or air quenching and tempering at 580–680 °C — before proceeding to final inspection. Browse our full stainless steel tube range to explore additional grades and sizes.
Mechanical Properties
Mechanical properties of 04Cr13Ni5Mo / S41500 seamless tubes depend on the heat treatment condition. ASTM A182 defines three classes for F6NM forgings; the same property ranges serve as benchmarks for seamless tube products when specified. The table below summarizes minimum and typical values achieved at Fushun Steel Tube.
| Condition | Standard | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Reduction of Area (%) | Hardness (HB) | Impact (KV, J) |
|---|---|---|---|---|---|---|---|
| QT Class 1 | ASTM A182 | ≥ 790 | ≥ 620 | ≥ 15 | ≥ 45 | ≤ 295 | ≥ 50 |
| QT Class 2 | ASTM A182 | ≥ 830 | ≥ 690 | ≥ 12 | ≥ 35 | ≤ 321 | ≥ 40 |
| QT Class 3 (double temper) | ASTM A182 | ≥ 900 | ≥ 795 | ≥ 12 | ≥ 35 | ≤ 350 | ≥ 30 |
| QT650 | EN 10088-3 | 700 – 850 | ≥ 500 | ≥ 15 | — | — | ≥ 50 |
| QT780 | EN 10088-3 | 780 – 980 | ≥ 620 | ≥ 14 | — | — | ≥ 40 |
| QT900 | EN 10088-3 | 900 – 1100 | ≥ 750 | ≥ 12 | — | — | ≥ 30 |
When ordering, specify the target strength class and applicable standard. We can tailor the tempering parameters to balance strength, toughness, and hardness for your specific application.
Heat Treatment
Proper heat treatment is critical to achieving the intended combination of strength and toughness in 04Cr13Ni5Mo. The typical processing route consists of austenitizing followed by quenching and single or double tempering. For stress relief after welding or machining, a subcritical stress-relief treatment is applied.
| Treatment | Temperature (°C) | Holding Time | Cooling Method |
|---|---|---|---|
| Austenitizing | 950 – 1050 | 30–60 min per 25 mm of section thickness | Oil quench or forced air cool |
| Tempering (single) | 580 – 680 | 2–4 hours minimum | Air cool |
| Tempering (double) | 620 – 680 (1st) 590 – 620 (2nd) | 2 hours minimum each cycle | Air cool to room temperature between cycles |
| Stress Relieving | 550 – 620 | 1 hour per 25 mm of section thickness | Slow furnace cool or still air cool |
Double tempering — used for Class 3 (ASTM A182) and QT900 (EN 10088-3) conditions — raises strength by precipitating fine carbides and transforming retained austenite to fresh martensite during the first temper, which is then tempered in the second cycle. This approach achieves tensile strengths exceeding 900 MPa while retaining adequate toughness.
Surface Finish & Tolerances
Fushun Steel Tube supplies 04Cr13Ni5Mo seamless tubes in a range of surface finishes tailored to end-use requirements. Hot-rolled tubes are supplied in a pickled and passivated condition, free of scale and with a uniform matte surface. Cold-drawn and cold-rolled precision tubes are available with bright annealed or polished finishes, achieving surface roughness values as low as Ra 0.4 μm. Dimensional tolerances meet or exceed the requirements of EN ISO 1127, DIN 2391, and ASTM A519, with OD and WT tolerances as tight as ±0.05 mm for the most demanding hydraulic and instrumentation applications. For components requiring internal surface finishing, we offer honed and skived tubes with controlled IDs and surface finishes suitable for hydraulic cylinder and pneumatic power system service.
Quality Assurance & Testing
Every 04Cr13Ni5Mo seamless tube we ship is backed by a comprehensive quality control workflow. Our ISO 9001-certified quality system begins with raw material verification — every heat is analyzed by optical emission spectrometry to confirm chemical composition before production. In-process checks include dimensional monitoring, surface condition inspection, and hardness testing at intermediate stages.
Finished product testing includes:
- Non-destructive testing (NDT) — Ultrasonic testing per EN 10246-7 / ASTM E213 or eddy current testing per EN 10246-1 for 100% of tubes
- Hydrostatic pressure testing — Per applicable standard or customer specification
- Mechanical testing — Tensile, impact (Charpy V-notch), and hardness tests per heat treatment lot
- Dimensional inspection — OD, WT, straightness, ovality, and length verification using calibrated instruments
- Metallographic examination — Grain size, microstructure, and inclusion content per ASTM E45 or equivalent
- Corrosion testing — Intergranular corrosion test per ASTM A262 or pitting resistance test upon request
All tubes are supplied with EN 10204 Type 3.1 certificates. Type 3.2 certificates with third-party inspection from LR, DNV, BV, or TÜV are available on request. Request a sample or inspection certificate to evaluate our quality firsthand.
Packing & Shipping
Tubes are bundled by size and heat treatment lot, with each bundle clearly tagged by grade, heat number, specification, and dimensions. Precision cold-drawn and cold-rolled tubes are individually wrapped in corrosion-inhibiting paper and packed in seaworthy wooden crates or steel frames. All shipments include a packing list, mill test certificates, and a certificate of origin. We ship via ocean freight (FCL/LCL), air freight, or rail, and can arrange door-to-door delivery through our logistics partners. Standard export packaging complies with ISPM 15 requirements for wooden materials. For urgent requirements, we coordinate expedited air freight dispatch from our factory in Hunan, China, to major international ports and airports worldwide.
Frequently Asked Questions
- What is the difference between 04Cr13Ni5Mo and standard 410 stainless steel?
- 04Cr13Ni5Mo contains lower carbon (≤0.04%) plus deliberate additions of nickel (3.5–5.5%) and molybdenum (0.50–1.00%). This chemistry delivers significantly better weldability, through-section toughness, and pitting corrosion resistance compared to standard 410 (1Cr13), which has higher carbon and no intentional nickel or molybdenum.
- What are the typical size ranges for 04Cr13Ni5Mo seamless tubes?
- Hot-rolled seamless tubes cover OD 32–530 mm with WT 2.5–50 mm. Cold-drawn and cold-rolled precision tubes cover OD 6–120 mm with WT 1–12 mm. Standard lengths are 5.8–12 m fixed-length or random-length. Custom dimensions are available with an MOQ of 2–3 tons.
- Can 04Cr13Ni5Mo / S41500 seamless tubes be welded?
- Yes. The low carbon content gives this grade good weldability compared to conventional martensitic stainless steels. Preheating to 100–200 °C and post-weld heat treatment (tempering at 580–620 °C) are recommended to restore toughness in the heat-affected zone. Matching filler metals such as ER410NiMo are commercially available.
- What quality certifications do you provide with 04Cr13Ni5Mo tubes?
- All tubes ship with EN 10204 Type 3.1 inspection certificates as standard, covering chemical analysis, mechanical properties, NDT results, and dimensional verification. Type 3.2 certificates with third-party inspection (LR, DNV, BV, TÜV) are available on request.
- What is the typical delivery time for 04Cr13Ni5Mo seamless tubes?
- Ready stock items ship in approximately 7 working days. Custom-manufactured orders with MOQ 2–3 tons typically deliver within 25–35 working days. Small trial orders for grade qualification are accepted, and volume order pricing and delivery terms are negotiable.
