Bar and Rod
Plate and Sheet
Strip
Pipe and Tube
Wire
Welding
Powder Material
Cast Products
Forged Products
Fittings
Fastening
Round Bar:
φ2–500 mm, 1–6 m length
Flat/Square Bar:
4–100 mm thickness/width
Hex Bar:
A/F 3–100 mm
Hollow Bar:
OD 20–300 mm
Sheet:
0.3–6 mm thickness
Medium Plate:
6–25 mm thickness
Heavy Plate:
25–100 mm thickness
Standard Strip:
0.05–3 mm thick,
10–600 mm wide
Precision strip:
0.01–0.5 mm thick,
tight tolerance ±0.005 mm
Foil:
0.005–0.1 mm thick
Seamless Tube:
OD 6–450 mm,
WT 1–50 mm,
1–12 m length
Welded Tube:
OD 10–600 mm,
WT 1–20 mm
Capillary Tube:
OD 1–10 mm,
WT 0.1–2 mm
Wire Form:
Cold Drawn Wire,
Bright Wire,
Spring Wire,
Fine Wire,
Ultra-fine Wire
General Diameter:
φ0.1–10 mm
Coil Weight:
50–500 kg,
customizable tolerance
Solid Wire:
φ0.8–4.0 mm
Flux-cored Wire:
φ1.2–4.0 mm
Welding Rod:
φ2.0–5.0 mm
Powder Form:
AM 3D Printing Powder,
Spherical Powder,
Gas-atomized Powder,
Water-atomized Powder
Particle Size:
10–150 μm
Sphericity:
≥90% for AM grade
Cast Ingot:
φ200–800 mm
Precision Casting:
min wall 0.5 mm
Cast Pipe:
OD 100–600 mm,
WT 10–50 mm
Forged Bar:
Φ35–500 mm
Forged Ring:
OD 200–2000 mm
Forging Weight:
1–5000 kg
Fittings Form:
Elbow, Tee, Reducer, Flange, Cap, Outlet, Lap Joint
Size range:
1/2''–24'' (DN15–DN600)
Wall thickness:
Sch10–Sch160, STD, XS, XXS
Pressure Class:
150–2500 LB
Fastening Form:
Bolt, Nut, Screw, Stud, Washer, Pin, Rivet
Metric: M3–M64
Imperial: #4–2.5''
Length: 6–500 mm
1.4105 is a free-machining ferritic stainless steel containing about 17% chromium with sulphur and a small molybdenum addition. This datasheet presents the material within the Werkstoff-Nummer (DIN / EN) designation system.
With nominally 17% chromium, added sulphur and a small molybdenum content, 1.4105 is essentially the free-machining version of 1.4016 (X6Cr17): the sulphur forms manganese-sulphide inclusions that improve chip breaking and machinability, while the molybdenum partly offsets the resulting loss of corrosion resistance. Being a low-carbon ferritic grade it is magnetic and cannot be hardened by heat treatment, and offers properties similar to 1.4016 with markedly better machinability. It is widely used for automatic-lathe production of small turned parts.
Typical applications include screws, nuts, fasteners, toolholders, ball valves, fittings, furniture parts, and components for the petrochemical, automotive, food and machinery industries.
| Property | Value | Unit |
|---|---|---|
| Density | 7.7 | g/cm³ |
| Melting range | 1425–1510 | °C |
| Elastic modulus | 220 | GPa |
| Coefficient of thermal expansion (20–100 °C) | 10.0 | µm/m·°C |
| Thermal conductivity (20 °C) | 25.0 | W/m·K |
| Specific heat (20 °C) | 460 | J/kg·K |
| Structure | Ferritic | — |
| Element | Symbol | Min % | Max % | Role in Alloy |
|---|---|---|---|---|
| Iron | Fe | Balance | — | Base element |
| Chromium | Cr | 16.0 | 18.0 | Corrosion resistance |
| Sulphur | S | 0.15 | 0.35 | Free-machining (MnS inclusions) |
| Molybdenum | Mo | 0.20 | 0.60 | Offsets sulphur loss of corrosion resistance |
| Manganese | Mn | — | 1.50 | Forms MnS; deoxidiser |
| Silicon | Si | — | 1.50 | Deoxidiser |
| Carbon | C | — | 0.08 | Low (ferritic) |
| Phosphorus | P | — | 0.040 | Residual impurity |
Annealed (+A) condition, per EN 10088-3 for W.Nr. 1.4105.
| Condition | Property | Value |
|---|---|---|
| Annealed | Tensile strength (Rm) | 450–650 MPa |
| Annealed | 0.2% proof strength (Rp0.2) | ≥250 MPa |
| Annealed | Elongation (A5) | ≥20 % |
| Annealed | Hardness | ≤200 HB |
| — | Elastic modulus | 220 GPa |
Values per EN 10088-3; not hardenable by heat treatment. Confirm against the inspection certificate (EN 10204).
| Environment | Performance | Notes |
|---|---|---|
| Atmospheric / general | Moderate | Below 1.4016 (sulphur reduces resistance) |
| Organic and nitric acids | Good | At low concentrations |
| Chloride pitting / crevice | Limited | Sulphide inclusions are initiation sites |
| Chloride stress-corrosion cracking | Very Good | Ferritic — largely immune |
| Seawater | Not recommended | — |
Corrosion resistance is moderate and below 1.4016; not resistant to intergranular corrosion. The molybdenum addition partly offsets the loss caused by the sulphur.
A ferritic free-machining grade; cannot be hardened by heat treatment. Properties are set by annealing.
Anneal Heat to approximately 760–820 °C and cool slowly. Avoid prolonged exposure in the 400–540 °C range (475 °C embrittlement).
Not suitable for welding — the high sulphur content promotes hot cracking.
| Welding Process | Applicability | Filler / Consumable |
|---|---|---|
| GTAW / TIG | Not recommended | Austenitic (309) if unavoidable |
| GMAW / MIG | Not recommended | — |
| Brazing | Preferred join method | — |
The free-machining sulphur addition makes this grade unsuitable for structural welding.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Machinability | Excellent — designed for automatic lathes |
| Chip breaking | MnS inclusions break chips; high speeds and feeds possible |
| Tooling | Standard carbide or HSS; good tool life |
| Coolant | Ample flood coolant |
Forming Processes
| Process | Notes |
|---|---|
| Cold forming | Limited — sulphur reduces ductility |
| Hot forming | ~1130–1050 °C forging range; anneal afterward |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Screw machining | Screws, nuts, fasteners, turned parts | Extensive machining |
| Petrochemical | Toolholders, fittings, valve parts | Machinability + moderate corrosion resistance |
| Food / machinery | Ball valves, machine parts | Machinability + corrosion resistance |
| Furniture / appliances | Decorative and functional parts | Machinability + cost |
| Product Form | DIN / EN Standard | Notes |
|---|---|---|
| Bar, rod and sections | EN 10088-3 · W.Nr. 1.4105 | X6CrMoS17 |
| Wire | EN 10088-3 · W.Nr. 1.4105 | — |
| Forging stock | EN 10088-3 · W.Nr. 1.4105 | — |
| Technical delivery | SEW 400 | — |
Free-machining (sulphurised) ferritic stainless steel. W.Nr. 1.4105 (X6CrMoS17).
| W.Nr. | Cr % | S % | Mo % | Best Used For |
|---|---|---|---|---|
| 1.4105 | 16–18 | 0.15–0.35 | 0.2–0.6 | Free-machining ferritic; screw-machine parts |
| 1.4016 | 16–18 | ≤0.015 | — | General ferritic; non-free-machining |
| 1.4104 | 16–18 | 0.15–0.35 | 0.2–0.6 | Free-machining, higher carbon (heat-treatable) |
| 1.4005 | 12–14 | 0.15–0.35 | ≤0.60 | Free-machining martensitic |
| 1.4305 | 17–19 | 0.15–0.35 | — | Free-machining austenitic |
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