EN 1 A

EN1A is a very popular grade of low carbon-manganese free cutting steel, which is most suitable for the manufacture of repetition turned components, such as nuts, bolts, hydraulic fittings and studs, particularly where intricate drilling and machining operations are involved.

It can be case-hardened, producing components with enhanced wear resistance. En1a is also available as En1a leaded (En1aPb) for greater machinability.  Swarf will form in small chips to prevent machine blockage.

EN1aNL steel is a non-leaded Re-Sulphurised Free Machining Steel. This is a premium grade of free cutting steel. It has excellent machinability. It is suitable for case hardening and electroplating. We can provide you with free cutting steel both in the black and bright cold drawn bar form.

En1a steels are suitable for applications where good machinability is the prime consideration. Because of this, they are used for the rapid production on single or multiple spindle automatic lathes and capstan lathes of finely finished components which will not be subjected to high stresses in service, e.g. light duty studs, cycle components and many intricate parts for textile and printing machinery.

This type of steel cannot be relied upon to possess good transverse properties and should not be used for hollow parts which might be subjected to an internal pressure which would set up wall stresses dangerously near to the transverse yield stress.

Case hardening can be carried out but this steel Is not recommended for general case hardening work and it is not intended for use where the hardened case is subject to severe impact in service.

Typical applications are Brake hose end, hydraulic parts, pulleys, disc brake pistons, wheel nuts and inserts, control linkages, hear box components (case hardened), domestic garbage bin axles, concrete anchors, padlock shackles, hydraulic fittings, vice jaws. En1a steel bars are used mostly in the bright form.

Available Types & Range

EN 1 A  – ROLLED

Size – 16 mm to 125 mm Dia

Brand – JSW, VSP,

EN 1A  – BRIGHT ROUNDS

size – 6 mm to 80 mm Dia

Brand – JSW, VSP, ASP, SAIL, SLR

Chemical Composition & Technical Specification EN 1 A

C Mn Si P S
Min 0.10 0.07 0.30
Max 0.15 1.00 0.35 0.06 0.60

Mechanical Properties (cold drawn condition)
Max Stress 370-480 n/mm2 Min dependent on ruling section
Yield Stress 240-400 n/mm2 Min dependent on ruling section
0.2% Proof Stress 225-360 n/mm2 Min dependent on ruling section
Elongation 6-10% Min dependent on ruling section

Weldability
Moderate

Machinability
Excellent machinability

Key features:

• Ideal for repetitively turned components
• Used in intricate drilling & machining operations
• Can be case hardened for improved wear resistance
• Superior finish
• Reasonable strength and ductility

Applications
• Nuts
• Bolts
• Studs
• Hydraulic fittings
• Precision machined components

Technical Assistance
Our knowledgeable staff backed up by our resident team of qualified metallurgists and engineers, will be pleased to
assist further on any technical topic.