Categories
- Round bars
- Stainless steel round bars 1.4028 / 3H13
- Stainless steel round bars 1.4122
- Stainless steel round bars 1.4034 / 420C
- Stainless steel round bars 1.4057 / 431
- Stainless steel round bars 1.4301 / 304
- Stainless steel round bars 1.4305 / 303
- Stainless steel round bars 1.4404 / 316L
- Stainless steel round bars duplex steel 1.4462 / S31803
- Stainless steel round bars 1.4541 / 321
- Stainless steel round bars 1.4571 / 316Ti
- Stainless steel round bars from heat-resistant steel
- Stainless steel round bars 1.4005 / 416
- Stainless steel round bars 1.4006 / 410
- Stainless steel round bars 1.4021 / 420A
- Seamless tubes and hollow bars
- Fittings
- Sheets
Item length
Diameter
Steel grade
Availability
Stainless steel cold-drawn round bar Diameter 10 mm in grade 1.4057 / 431 100cm
- Length: 100 cm
- Outside diameter (OD): 10 mm
- Steel grade: 1.4057 / 431
Availability:
available
Dispatched within: 3 days
Stainless steel cold-drawn round bar Diameter 10 mm in grade 1.4057 / 431 10cm
- Length: 10 cm
- Outside diameter (OD): 10 mm
- Steel grade: 1.4057 / 431
Availability:
available
Dispatched within: 3 days
Stainless steel cold-drawn round bar Diameter 10 mm in grade 1.4057 / 431 110cm
- Length: 110 cm
- Outside diameter (OD): 10 mm
- Steel grade: 1.4057 / 431
Availability:
available
Dispatched within: 3 days
Stainless steel cold-drawn round bar Diameter 10 mm in grade 1.4057 / 431 120cm
- Length: 120 cm
- Outside diameter (OD): 10 mm
- Steel grade: 1.4057 / 431
Availability:
available
Dispatched within: 3 days
Stainless steel cold-drawn round bar Diameter 10 mm in grade 1.4057 / 431 130cm
- Length: 130 cm
- Outside diameter (OD): 10 mm
- Steel grade: 1.4057 / 431
Availability:
available
Dispatched within: 3 days
Stainless steel cold-drawn round bar Diameter 10 mm in grade 1.4057 / 431 140cm
- Length: 140 cm
- Outside diameter (OD): 10 mm
- Steel grade: 1.4057 / 431
Availability:
available
Dispatched within: 3 days
Stainless steel cold-drawn round bar Diameter 10 mm in grade 1.4057 / 431 150cm
- Length: 150 cm
- Outside diameter (OD): 10 mm
- Steel grade: 1.4057 / 431
Availability:
available
Dispatched within: 3 days
Stainless steel cold-drawn round bar Diameter 10 mm in grade 1.4057 / 431 160cm
- Length: 160 cm
- Outside diameter (OD): 10 mm
- Steel grade: 1.4057 / 431
Availability:
available
Dispatched within: 3 days
Stainless steel cold-drawn round bar Diameter 10 mm in grade 1.4057 / 431 170cm
- Length: 170 cm
- Outside diameter (OD): 10 mm
- Steel grade: 1.4057 / 431
Availability:
available
Dispatched within: 3 days
Stainless steel cold-drawn round bar Diameter 10 mm in grade 1.4057 / 431 20cm
- Length: 20 cm
- Outside diameter (OD): 10 mm
- Steel grade: 1.4057 / 431
Availability:
available
Dispatched within: 3 days
Stainless steel cold-drawn round bar Diameter 10 mm in grade 1.4057 / 431 30cm
- Length: 30 cm
- Outside diameter (OD): 10 mm
- Steel grade: 1.4057 / 431
Availability:
available
Dispatched within: 3 days
Stainless steel cold-drawn round bar Diameter 10 mm in grade 1.4057 / 431 40cm
- Length: 40 cm
- Outside diameter (OD): 10 mm
- Steel grade: 1.4057 / 431
Availability:
available
Dispatched within: 3 days
Stainless steel round bars 1.4057 / 431 — overview
Stainless steel round bars 1.4057 / 431 are solid round rods made from the martensitic, heat‑treatable stainless steel commonly referenced in Europe as EN 1.4057 and in the US as AISI 431 or UNS S43100. These round bars combine higher strength and hardness (after heat treatment) with reasonable corrosion resistance, and are a standard choice where wear resistance and mechanical performance are required alongside basic stainless behaviour.
What is 1.4057 / 431 stainless steel?
1.4057 / 431 is a martensitic stainless grade. In plain terms, that means the alloy can be hardened by quenching and tempering to reach high strength and hardness levels. Its main alloying element is chromium, which gives it stainless properties; it also contains carbon and other alloying elements that allow hardening and improved mechanical properties. The grade is magnetic and is classified as a stainless steel (not plain carbon steel).
Typical uses and applications
Stainless steel round bars 1.4057 / 431 are used where a combination of strength, wear resistance and acceptable corrosion resistance is needed. Typical applications include:
- Rotating shafts and axles (including marine propeller shafts in some designs)
- Pump and valve components, stems and spindles
- Fasteners and bolts requiring high strength and some corrosion resistance
- Tooling, pins, bushes and wear parts
- Automotive components, drive parts and mechanical assemblies
- General engineering and maintenance work in industrial environments
Industries that commonly use 1.4057 / 431 round bars
From small workshops to major industrial sectors, this grade appears across multiple industries, for example:
- Mechanical engineering and general fabrication
- Automotive and commercial vehicle component manufacture
- Marine and offshore (where designers accept its limits compared with austenitic grades)
- Oil & gas and petrochemical equipment (for selected, non‑highly corrosive applications)
- Pumps, valves and hydraulics
- Maintenance, repair and overhaul (MRO) and specialist tooling
Technical characteristics — what to expect
Key properties that define stainless steel round bars 1.4057 / 431:
- Heat‑treatable — can be quenched and tempered to achieve high hardness and tensile strength.
- Good strength and wear resistance — suitable for parts under load or subject to abrasion.
- Moderate corrosion resistance — better than plain carbon steels but lower than austenitic grades such as 304 or 316; performance depends on environment (chloride rich or highly acidic environments are not ideal).
- Magnetic — martensitic structure is magnetic.
- Machinability and weldability — machinable in the annealed condition; welding is possible but usually requires pre‑ and post‑heat treatment to avoid cracking.
Designation equivalents and naming
This grade is commonly sold and referenced under several names. Using these makes it easier to match specifications across standards:
- European EN: 1.4057
- Common name / grade: 431 (martensitic stainless steel)
- US: AISI 431 / UNS S43100
Forms, finishes and supply options
As a category, stainless steel round bars 1.4057 / 431 are offered in a variety of diameters and surface finishes to suit different manufacturing needs. Typical finishes include turned (bright) and precision ground bars. The bars are supplied in the annealed condition for easier machining and can be heat treated afterwards to reach required hardness and strength.
Selection and handling advice
When choosing 1.4057 / 431 round bars, consider:
- Environment: for aggressive chloride or highly corrosive environments choose austenitic or higher‑alloy grades instead of 431.
- Heat treatment: if high hardness is required, plan for quench & temper processes and confirm specification limits with your supplier.
- Welding: expect the need for preheating and controlled post‑weld heat treatment to avoid cracking; consult welding guidelines for martensitic stainless steels.
- Surface finish: for bearing or seal applications, specify precision ground or polished bars where surface finish matters.
Who should consider stainless steel round bars 1.4057 / 431?
This product is suitable for mechanical engineers, maintenance workshops, component manufacturers, marine engineers (for selected shafting and components), automotive parts makers, pump and valve manufacturers, and anyone needing strong, heat‑treatable stainless rods for machining or fabrication.
Why buy from a specialist stainless supplier?
When buying stainless steel round bars 1.4057 / 431 from a specialist supplier you gain access to certified material, traceability, advice on heat treatment and finishes, and support in selecting the right diameter and tolerance for your application. If you are uncertain whether 1.4057 / 431 is the best choice, a supplier can recommend alternative stainless grades (for example austenitic 304/316 for superior corrosion resistance) based on your operating environment and mechanical requirements.