Stainless steels 1.4301 and 1.4571 under the forging hammer

Two silver parts can look almost identical yet behave differently in service. At Extra Forge, we also forge stainless steels 1.4301 and 1.4571. Their story shows how a few percent of alloying elements can change a material’s suitability for a particular component.

The key difference: when to choose 304 or 316Ti

Choose 1.4301 when the service medium and cleaning process allow it: it is a versatile option for less aggressive environments, without paying for alloying additions the application does not need. Consider 1.4571 when molybdenum’s extra resistance to chloride-related localised corrosion or titanium stabilisation against intergranular corrosion is relevant. It is not automatically stronger or suitable for every chemical or seawater application.

Hot forging at Extra Forge. The photograph illustrates the process; the specific steel grade shown is not identified.

What modelling clay can teach us

Remember modelling clay that was difficult to shape when cold, then became more pliable after a few minutes in your hands? That image helps explain hot forging. Heated steel changes shape under pressure and fills the die while remaining solid. Its temperature must suit the material and the process.

This applies to both grades discussed here. The clay analogy explains the effect of temperature; it does not mean that one steel is always “soft” and the other “hard”. Deformation speed, geometry and material condition also affect the forging process.

What is inside the material

Both are austenitic stainless steels. 1.4301 is commonly known as AISI 304 or X5CrNi18-10, while 1.4571 is known as AISI 316Ti or X6CrNiMoTi17-12-2.

Selected element	1.4301	1.4571
Chromium Cr	17.5–19.5%	16.5–18.5%
Nickel Ni	8.0–10.5%	10.5–13.5%
Molybdenum Mo	Not specified	2.0–2.5%
Titanium Ti	Not specified	Minimum 5 × C; maximum 0.70%
Carbon C	Maximum 0.07%	Maximum 0.08%
Iron Fe	Balance	Balance

Mass percentages from the cited datasheets for DIN EN 10088-3; selected elements only. “Not specified” does not guarantee zero content. The material certificate states the actual heat chemistry.

Small additions with different jobs

Chromium enables a protective passive layer to form, while nickel helps stabilise the austenitic structure. Molybdenum in 1.4571 improves resistance to pitting and crevice corrosion in chloride-containing environments. Titanium binds carbon into carbides and helps limit intergranular corrosion. The designation 316Ti therefore identifies titanium-stabilised steel.

Choosing a grade for your component

1.4301 is widely used in food equipment and general industrial applications. 1.4571 may be more suitable for demanding process equipment, valves and flanges where extra corrosion resistance is needed. Its resistance also has limits, particularly in salt water.

An interesting detail: at room temperature, the cited datasheets give both grades a tensile strength of 500–700 MPa for solution-annealed material up to 160 mm in diameter. Selection therefore involves more than strength: the service medium, operating temperature, loads and final processing all matter. These figures are not guaranteed properties of every forging.

Typical applications by industry

• Food and beverage equipment: 1.4301 for brackets, fittings and equipment components in compatible environments; assess 1.4571 where the product or cleaning chemistry requires greater corrosion resistance.

• Mechanical engineering: 1.4301 for general machine components and connecting parts; 1.4571 where components encounter more aggressive process media.

• Chemical and process industries: consider 1.4571 for valve, pump and piping components after checking the medium, concentration and temperature.

• Welded or thermally exposed assemblies: titanium stabilisation may favour 1.4571; the welding procedure, heat treatment and surface condition still require assessment.

Looking for a stainless steel forging supplier? Send Extra Forge your drawing, annual quantity, medium, service temperature and finishing requirements. We can assess forging feasibility in 1.4301 or 1.4571 for your project.

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