Project Description
13Cr13Mo Stainless Steel Seamless Tube — Mo-Enhanced Martensitic Grade
13Cr13Mo (formerly designated 1Cr13Mo under older Chinese standards, also known as SUS410J1 in JIS and S45710 under the ISC numbering system) is a martensitic stainless steel grade engineered by adding 0.30–0.60% molybdenum to the classic 12Cr13 (410) base composition. This deliberate Mo addition delivers measurably better corrosion resistance and elevated-temperature strength compared to standard chromium-only martensitic grades, making 13Cr13Mo seamless tubes a practical choice for components that must hold mechanical integrity in mildly corrosive environments at service temperatures up to approximately 600 °C.
At Fushun Steel Tube, we manufacture 13Cr13Mo seamless tubes through our integrated steelmaking and pipe-forming route — EAF + LF + VD refining followed by hot-rolled seamless piercing or cold-drawn/cold-rolled precision processing. The result is a tube product with consistent chemistry, tight dimensional tolerances, and mechanical properties that meet or exceed the requirements of GB/T 1220, ASTM A268, ASTM A511, and EN 10297-2. After quenching from 970–1020 °C and tempering at 650–750 °C, 13Cr13Mo tubes achieve a minimum tensile strength of 690 MPa with good ductility — elongation ≥20% and reduction of area ≥60%.
Whether you need standard-size 13Cr13Mo tubes from ready stock or custom dimensions produced to your exact specifications, contact us for a free quote and we will respond with a competitive offer within one business day.
Key Applications of 13Cr13Mo Seamless Tube
The combination of hardenability, moderate corrosion resistance, and good high-temperature strength positions 13Cr13Mo seamless tubes for demanding mechanical and thermal applications across multiple industries:
- Steam turbine blades and rotor components — The Mo addition improves creep resistance and reduces susceptibility to temper embrittlement in long-term elevated-temperature service.
- High-temperature bolting and fasteners — 13Cr13Mo tubes machined into studs, bolts, and tie rods for flanged connections in steam and gas turbine assemblies.
- Pump shafts and valve stems — Good combination of strength and corrosion resistance for rotating and sliding components exposed to steam, water, and mild chemical media.
- Compressor blades and impellers — Used in axial and centrifugal compressors handling air or mildly corrosive process gases.
- Automotive exhaust system components — SUS410J1 tubes for EGR cooler tubing, exhaust gas recirculation pipes, and sensor boss tubes requiring thermal cycling resistance.
- Heat exchanger tubes — Suitable for shell-and-tube exchangers in refinery and petrochemical services where chloride stress corrosion cracking is not a primary concern.
- Cutlery, surgical instruments, and blade stock — 13Cr13Mo takes and holds a sharp edge after heat treatment while offering better stain resistance than plain carbon tool steels.
- Hydraulic cylinder components — Precision cold-drawn 13Cr13Mo tubes for piston rods and cylinder barrels in moderate-corrosion hydraulic systems.
If your application falls outside these categories, tell us your specifications — our engineering team can assess whether 13Cr13Mo is the right material for your operating conditions.
13Cr13Mo Seamless Stainless Steel Tube Product View
Below is a representative view of our 13Cr13Mo martensitic stainless steel seamless tubes. All products undergo full dimensional inspection, NDT, and mechanical testing prior to shipment, with EN 10204 3.1 or 3.2 certification available on request.
Specifications & Applicable Standards
13Cr13Mo seamless tubes are manufactured and tested in accordance with the following international and national standards. The grade appears under multiple standard systems, reflecting its broad acceptance in global engineering specifications:
Chinese Standards (GB)
- GB/T 1220-2007 — Stainless steel bars (covers chemical composition, mechanical properties, and heat treatment for bar stock; tube properties derived from same melt practice)
- GB/T 1221-2007 — Heat-resisting steel bars
- GB/T 14975-2012 — Seamless stainless steel tubes for structural applications
- GB/T 14976-2012 — Seamless stainless steel tubes for fluid transport
- GB/T 20878-2007 — Stainless and heat-resisting steel grades and chemical composition (ISC S45710)
ASTM / ASME Standards
- ASTM A268/A268M — Seamless and welded ferritic and martensitic stainless steel tubing for general service
- ASTM A511/A511M — Seamless stainless steel mechanical tubing
European Standards (EN)
- EN 10297-2 — Seamless circular steel tubes for mechanical and general engineering purposes — stainless steel
- EN 10088-1 — Stainless steels — list of grades (X15Cr13, 1.4024)
Japanese Standards (JIS)
- JIS G4303 — Stainless steel bars (SUS410J1)
- JIS G4304 — Hot-rolled stainless steel plates, sheets and strip
- JIS G3463 — Stainless steel boiler and heat exchanger tubes
Equivalent International Grades
| Standard System | Country / Region | Grade Designation |
|---|---|---|
| GB (New) | China | 13Cr13Mo (S45710) |
| GB (Old) | China | 1Cr13Mo |
| JIS | Japan | SUS410J1 |
| CNS | Taiwan | 410J1 |
| KS | Korea | STS410J1 |
| DIN / EN | Germany / EU | X15Cr13 (1.4024) |
| BS | United Kingdom | 420S29 |
| ISO | International | X13CrMo13 (1.4119) |
All products are supplied with ISO 9001 certified quality assurance and full traceability from heat number to final delivery. Request a sample with full mill test certificates to validate the grade against your requirements.
Available Sizes & Delivery Information
Fushun Steel Tube supplies 13Cr13Mo seamless tubes across a comprehensive size range, manufactured by hot-rolled or cold-drawn/cold-rolled processes depending on your dimensional and surface finish requirements.
| Manufacturing Process | Outer Diameter (OD) | Wall Thickness (WT) | Length |
|---|---|---|---|
| Hot-Rolled Seamless | 32–426 mm | 3.5–40 mm | 4–12 m (fixed or random) |
| Cold-Drawn Seamless | 6–219 mm | 0.5–25 mm | Up to 15 m (straightened) |
| Cold-Rolled Precision | 6–89 mm | 0.5–10 mm | Up to 12 m |
Delivery Schedule
- Ready Stock (Common Sizes)
- Approximately 7 days from order confirmation. Our warehouse maintains an inventory of popular OD/WT combinations in the annealed condition, ready for final heat treatment and inspection.
- Custom / Non-Standard Production
- Approximately 25–35 days from order confirmation. Minimum order quantity: 2–3 tons per heat. Our flexible EAF melting shop handles small-batch production efficiently.
- Small Trial Orders
- Accepted for special grades and new applications. We support prototype and qualification quantities — contact our sales team to discuss your trial requirements.
- Volume Orders
- Negotiable pricing and delivery schedules. Multi-heat production runs benefit from economies of scale across melting, forging, and tube-making.
Chemical Composition of 13Cr13Mo (1Cr13Mo / SUS410J1)
The chemical composition of 13Cr13Mo is tightly controlled across all applicable standards. The defining feature is the intentional addition of molybdenum (0.30–0.60%), which enhances pitting corrosion resistance and elevated-temperature strength compared to standard Mo-free 12Cr13 (410) grade. Heat analysis is performed on every cast using optical emission spectrometry, and results are documented on the mill test certificate.
| Element | Symbol | Min (%) | Max (%) | Notes |
|---|---|---|---|---|
| Carbon | C | 0.08 | 0.18 | Controls hardenability and as-quenched hardness |
| Silicon | Si | — | 0.60 | Deoxidizer; kept low to minimize delta ferrite |
| Manganese | Mn | — | 1.00 | Deoxidizer and sulfide former |
| Phosphorus | P | — | 0.040 | Residual element; tightly limited for toughness |
| Sulfur | S | — | 0.030 | Residual element; controlled for machinability and hot workability |
| Chromium | Cr | 11.50 | 14.00 | Primary alloying element for corrosion resistance and hardenability |
| Nickel | Ni | — | 0.60 | Residual only; not deliberately added |
| Molybdenum | Mo | 0.30 | 0.60 | Enhances pitting resistance and creep strength; key differentiator from 410 |
The composition above conforms to GB/T 1220-2007, GB/T 20878-2007, and JIS G4303 for SUS410J1. Some European standards list the nearest equivalent as X15Cr13 (EN 1.4024), though precise Mo limits may vary slightly — always confirm against the purchasing specification. Fushun Steel Tube can target specific carbon and chromium ranges within the standard window to optimize properties for your application.
Manufacturing Process for 13Cr13Mo Seamless Tubes
Fushun Steel Tube produces 13Cr13Mo seamless tubes through a fully integrated manufacturing route that begins with primary steelmaking and ends with finished, inspected tube products ready for dispatch. Our in-house control over every step ensures consistent chemistry, microstructure, and mechanical properties across production lots.
Steelmaking: The melt is produced in an EAF using carefully selected scrap and ferroalloys. Ladle refining (LF) adjusts chemistry to the target composition, and vacuum degassing (VD) removes dissolved gases — particularly hydrogen, which can cause flaking in martensitic steels. For critical applications, optional ESR or VIM+VAR remelting routes are available to achieve exceptional cleanliness and microstructural uniformity. The ingot or continuously cast billet is then forged or rolled into tube rounds suitable for piercing.
Pipe-Making: Tube rounds are heated and pierced on a Mannesmann-type mill to produce a hollow shell, which is then elongated and sized on a mandrel mill or Assel mill to the target dimensions. For precision applications, hot-rolled tubes undergo subsequent cold-drawing or cold-rolling passes through tungsten carbide dies and mandrels, achieving tight OD/WT tolerances and improved surface finish. Final heat treatment — quenching from 970–1020 °C in oil followed by tempering at 650–750 °C — develops the required martensitic microstructure with optimum strength-toughness balance.
Mechanical Properties of 13Cr13Mo Seamless Tube
Mechanical properties are determined on test specimens taken from the finished tube wall in the longitudinal direction. The values below represent the minimum guaranteed properties for 13Cr13Mo in the quenched and tempered condition per GB/T 1220-2007 for bar diameters ≤75 mm. Tube properties are equivalent or superior due to the additional hot-working and cold-finishing steps.
| Property | Symbol | Minimum Value | Unit |
|---|---|---|---|
| Tensile Strength | Rm | 690 | MPa |
| Yield Strength (0.2% offset) | Rp0.2 | 490 | MPa |
| Elongation | A5 | 20 | % |
| Reduction of Area | Z | 60 | % |
| Charpy Impact Energy (U-notch) | KU2 | 78 | J |
| Hardness (Quenched & Tempered) | HBW | 192–255 | HBW |
| Hardness (Annealed, max.) | HBW | ≤ 200 | HBW |
Property Comparison by Condition
| Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HBW) |
|---|---|---|---|---|
| Annealed | — (not specified) | — | — | ≤ 200 |
| Quenched + Tempered (Standard) | ≥ 690 | ≥ 490 | ≥ 20 | ≥ 192 |
| Quenched + Low-Temp Tempered | ≥ 850 | ≥ 650 | ≥ 14 | 250–320 |
Values for the low-temperature tempered condition are achievable with adjusted heat treatment parameters tuned to your specific strength-ductility requirements. Contact our technical team to discuss custom mechanical property targets for your order.
Heat Treatment of 13Cr13Mo Seamless Tubes
Proper heat treatment is critical for developing the full mechanical property potential of 13Cr13Mo martensitic stainless steel. Fushun Steel Tube operates computer-controlled furnaces with multi-zone temperature uniformity of ±10 °C, ensuring consistent transformation and property uniformity across the entire tube length.
| Treatment | Temperature Range | Holding Method | Cooling Method | Resulting Microstructure |
|---|---|---|---|---|
| Annealing | 830–900 °C | Soak 1–2 h depending on section | Slow cool (furnace) | Ferrite + spheroidized carbides |
| Subcritical Annealing | ~750 °C | Soak 2–4 h | Fast cool (air) | Softened martensite |
| Austenitizing / Quenching | 970–1020 °C | Soak 30–60 min | Oil quench | Fresh martensite (as-quenched) |
| Tempering | 650–750 °C | Soak 2–4 h minimum | Fast cool (air or oil) | Tempered martensite |
Important note on tempering: The 650–750 °C tempering range is intentionally selected to be above the temper embrittlement range (~400–550 °C) commonly observed in martensitic stainless steels containing chromium. The mandatory fast cooling after tempering further suppresses embrittlement kinetics. For applications requiring higher hardness (above 250 HBW), lower tempering temperatures in the 200–350 °C range can be applied — but this reduces toughness and should only be specified when hardness is the primary requirement.
Surface Finish & Dimensional Tolerances
13Cr13Mo seamless tubes are available in a range of surface finishes and tolerance classes to match your application requirements. Our cold-finishing capabilities deliver precision dimensions and surface quality suitable for honing, chrome plating, or direct use in machined components.
Surface Conditions
- Hot-rolled / as-pickled: A matte gray finish with light mill scale removed by acid pickling and passivation. Suitable for general structural and mechanical applications where surface appearance is secondary.
- Cold-drawn (as-drawn): Smooth, bright metallic surface with characteristic longitudinal draw marks. Typical surface roughness Ra 1.6–3.2 µm. Suitable for components requiring subsequent machining.
- Cold-rolled / bright annealed: Mirror-like finish achieved through cold-rolling and controlled-atmosphere bright annealing. Surface roughness Ra ≤ 0.8 µm. Ideal for hydraulic cylinder tubes, piston rods, and decorative applications.
- Honed / polished: Internal diameter honed to Ra ≤ 0.4 µm or finer, with external polishing available. For precision pneumatic and hydraulic cylinder tubes.
Dimensional Tolerances
Cold-drawn and cold-rolled 13Cr13Mo tubes are supplied to tight tolerances per EN 10305-1 or equivalent national standards. Typical OD tolerances are ±0.08 mm for diameters up to 30 mm and ±0.15 mm for 30–50 mm. Wall thickness tolerances are typically ±10% of nominal, with tighter ±8% or ±5% achievable on request. Straightness is controlled to ≤1 mm/m (cold-finished) or ≤2 mm/m (hot-rolled). Our cold-drawn steel tube and cold-rolled steel tube lines are configured for martensitic stainless grades including 13Cr13Mo.
Quality Assurance & Testing
Every lot of 13Cr13Mo seamless tube undergoes a rigorous multi-stage quality control program. Our ISO 9001-certified quality management system ensures that every tube shipped meets or exceeds the requirements of the applicable standard and your purchase specification.
Raw Material Inspection
- Chemical analysis of every heat by optical emission spectrometry (OES)
- Hydrogen content verification on vacuum-degassed heats
- Ultrasonic testing of tube rounds for internal defects before piercing
In-Process Controls
- Real-time OD/WT monitoring on hot-rolling and cold-drawing lines
- Furnace temperature chart recording for all heat treatment cycles
- Hardness spot checks after quenching and after tempering
Finished Product Testing
- Non-destructive testing: 100% ultrasonic testing (UT) or eddy current testing (ET) per ASTM E213 or EN 10246-3 for longitudinal and transverse flaw detection
- Hydrostatic testing: Performed to specified test pressure per ASTM A450 or EN 10216-5 when required
- Mechanical testing: Tensile test (ambient), hardness test (Brinell or Rockwell), Charpy impact test (when specified), and flattening/flaring test per applicable product standard
- Dimensional inspection: 100% OD/WT/length verification with calibrated micrometers and laser gauges
- Metallographic examination: Microstructure verification to confirm fully tempered martensite, grain size determination per ASTM E112, and inclusion rating per ASTM E45 or equivalent
- Intergranular corrosion test: Per ASTM A262 Practice E or EN ISO 3651-2 when specified
Mill test certificates — EN 10204 3.1 (standard) or 3.2 (third-party witnessed) — are issued with every shipment, documenting all chemical, mechanical, NDT, and dimensional results against the applicable standard.
Packing & Shipping
Fushun Steel Tube packages 13Cr13Mo seamless tubes to ensure they arrive in factory condition, regardless of transport distance or handling conditions:
- Small-diameter tubes (OD ≤ 60 mm): Bundled in hexagonal or square packs, secured with steel straps, wrapped in waterproof polyethylene film. Tube ends fitted with plastic protective caps.
- Medium and large-diameter tubes (OD > 60 mm): Individually wrapped or bundled in small quantities with wooden spacers to prevent contact damage. End bevels are protected with metal or plastic end caps.
- Precision tubes: Each tube individually sleeved in VCI (volatile corrosion inhibitor) paper or film, then packed in plywood cases with foam cushioning. Desiccant packets are included for sea freight.
- Shipping methods: Sea freight (FCL/LCL), air freight for urgent orders, rail freight for land-bridge routes, and express courier for small trial quantities. We ship from major Chinese ports (Shanghai, Ningbo, Tianjin, Shenzhen) to destinations worldwide.
All packages are clearly labeled with heat number, specification, dimensions, and customer purchase order reference for full traceability from receipt to installation.
Frequently Asked Questions
- Is 13Cr13Mo the same as SUS410J1?
- Yes, 13Cr13Mo (GB/T 1220) and SUS410J1 (JIS G4303) are essentially the same martensitic stainless steel grade. Both contain 11.5–14.0% Cr and 0.30–0.60% Mo with carbon at 0.08–0.18%. Minor differences in residual element limits may exist between standards — always specify which standard governs your order.
- Can 13Cr13Mo seamless tubes be used for pressure-containing service?
- 13Cr13Mo is primarily a mechanical/structural grade rather than a pressure vessel grade. For pressure applications, consult the applicable design code. Tubes can be supplied to EN 10216-5 for stainless steel pressure tubes if the grade is accepted by the end user's engineering specification.
- What is the maximum service temperature for 13Cr13Mo tubes?
- 13Cr13Mo retains useful mechanical properties up to approximately 600 °C in continuous service. Above 600 °C, oxidation resistance and creep strength decline. For sustained elevated-temperature service, verify the tempering temperature is at least 50 °C above the maximum service temperature to avoid in-service softening.
- Does Fushun Steel Tube provide cut-to-length service for 13Cr13Mo tubes?
- Yes. We cut tubes to your specified exact length at no extra charge for standard tolerances. Precision saw-cut ends with chamfered edges are also available. Minimum cut length is 500 mm for cold-finished tubes and 1000 mm for hot-rolled tubes.
- How does 13Cr13Mo compare to 12Cr13 (410) in corrosion resistance?
- The 0.30–0.60% molybdenum addition in 13Cr13Mo provides measurably better resistance to pitting corrosion and general corrosion in mildly acidic and chloride-containing environments compared to standard Mo-free 12Cr13 (410). This makes it a preferred choice for steam turbine blades and valve components where both strength and corrosion resistance matter.
Get a Quote for 13Cr13Mo Seamless Tubes
Fushun Steel Tube is ready to support your project with high-quality 13Cr13Mo (1Cr13Mo / SUS410J1) martensitic stainless steel seamless tubes. Whether you need standard dimensions from stock or a custom production run with modified chemistry, tailored heat treatment, cold-drawn precision tolerances, or full EN 10204 3.2 certification, our integrated manufacturing and quality control capabilities deliver consistent, traceable products on schedule.
Contact us for a free quote with your required OD, WT, length, quantity, delivery condition, and applicable standard — we respond with a competitive offer within one business day.
