X5CrNiMo17-12-2 Material Chemical Composition
Apr 03, 2026
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What material is X5CrNiMo17-12-2 ?
X5CrNiMo17-12-2 is an austenitic stainless steel, commonly referred to as AISI 316. It is a molybdenum-bearing grade (containing approximately 2%–2.5% molybdenum) that offers superior corrosion resistance compared to standard 304 (1.4301) stainless steel particularly against chlorides and non-oxidizing acids and is frequently used in the manufacture of pressure vessels, chemical equipment, marine fittings, and pharmaceutical machinery.
What is the chemical composition of X5CrNiMo17-12-2 stainless steel?
X5CrNiMo17-12-2 (EN 1.4401) is an austenitic, molybdenum-bearing stainless steel often called AISI 316, widely used for superior corrosion resistance against chlorides. It contains 16.5–18.5% Chromium, 10–13% Nickel, and 2–2.5% Molybdenum, with a maximum of 0.07% Carbon. It is commonly used in marine, chemical, and food industries.
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | N |
|---|---|---|---|---|---|---|---|---|---|
| min | - | - | - | - | - | 16.5 | 10 | 2 | - |
|
max |
0.07 | 1 | 2 | 0.045 | 0.015 | 18.5 | 13 | 2.5 | 0.11 |
X5CrNiMo17-12-2 Stainless Steel Plate: Mechanical Properties
| Thickness t (mm) | Heat Treatment or Condition | Tensile Strength σb (MPa) | Yield Point σs (MPa) | Elongation δ (%) | Impact Absorption Energy KV2 (J) |
|---|---|---|---|---|---|
| t ≤ 8 (Transverse) | Cold-Rolled Steel Strip (C) and Solution Annealing | 530~680 | ≥240 |
≥40 |
|
| t ≤13.5(Transverse) | Hot-Rolled Steel Strip (H) and Solution Annealing | 530~680 | ≥220 | ≥40 | ≥60 |
| t ≤ 75 (Transverse) | Hot-Rolled Medium-to-Thick Plate (P) and Solution Annealing | 520~670 | ≥220 | ≥45 | ≥60 |
| t≤13.5(Longitudinal) | Hot-Rolled Steel Strip (H) and Solution Annealing | ≥100 | |||
| t ≤ 75 (Longitudinal) | Hot-Rolled Medium-to-Thick Plate (P) and Solution Annealing | ≥100 |
Minimum Yield Strength at Elevated Temperatures
| Steel Designation | Heat Treatment Condition | Minimum 0.2% Proof Strength, MPa (at Temperature °C) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Name | Number | 100 | 150 | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 550 | |
| X5CrNiMo17-12-2 | 1.4401 | +AT | 177 | 162 | 147 | 137 | 127 | 120 | 115 | 112 | 110 | 108 |
EN 10088 European Standard Stainless Steel Heat Treatment Specifications
| Steel Designation | Hot Working Forming | Heat Treatment Condition | Annealing | |||
|---|---|---|---|---|---|---|
| Name | Number | Temperature (°C) | Cooling Type | Temperature (°C) | Cooling Type | |
| X5CrNiMo17-12-2 | 1.4401 | 1150~850 | Air Cooling | +AT | 1030~1110 | Water / Air |
How is the corrosion resistance of 1.4401 stainless steel?
1.4401 (AISI 316) stainless steel offers excellent corrosion resistance, particularly in chloride-rich and marine environments, due to its 2-3% molybdenum content. It outperforms standard 304 (1.4301) steel against pitting and crevice corrosion, making it ideal for chemical processing, coastal, and pharmaceutical applications.
The weldability of 1.4401 stainless steel
1.4401 (AISI 316) stainless steel exhibits excellent weldability across common welding methods-such as TIG (GTAW), MIG (GMAW), and SAW-and typically requires no post-weld heat treatment. Its low carbon content (≤0.08%) reduces susceptibility to intergranular corrosion, making it particularly suitable for structural components where corrosion resistance is of critical importance.
Is 1.4401 stainless steel magnetic?
1.4401 (AISI 316) stainless steel is generally non-magnetic in its annealed state. As an austenitic steel with high nickel and molybdenum content, it does not typically attract magnets. However, it may exhibit very weak magnetism after cold working (bending, cutting, or forming) due to a partial martensitic transformation.
GNEE supplies X2CrNiMo17-12-2 in all forms, including plates/strips/coils, bars/wire rods, and tubes.
Hot-Rolled Medium-to-Heavy Plates: Thickness typically ranges from 4.0 mm to over 200 mm, with widths reaching up to 2400 mm.
Coils: Thickness ranges from 0.3 mm to 3.0 mm; supplied in coiled form to facilitate continuous stamping operations.
Round Bars: Diameter ranges from precision fine bars of φ1 mm to large forged bars of φ700 mm.
Wire Rods/Wires: Diameter ranges from 0.1 mm to 13.0 mm; supplied in coils or straight lengths for the manufacture of welding wire, woven mesh, fasteners, and similar products.
Seamless Tubes: Outer diameters range from 6 mm to 630 mm, with wall thicknesses of 1 mm to 50 mm.
Welded Tubes: Available in a wide variety of specifications and can be customized according to specific requirements.
Delivery Condition: Typically supplied in a solution-annealed (+AT) and pickled condition to ensure optimal corrosion resistance and machinability.
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