WORKING WITH US
Request MI.SO. Free Check

PR80

PR80 steel (36SMnPb14) is an excellent choice for high-strength precision engineering small parts, combining excellent machinability and good mechanical properties.

Chemical composition

36SMnPb14

ISO Standard

1.0765

The PR80also known as 36SMnPb14, is a automatic lead and manganese steel high mechanical resistance. Thanks to the combination of sulphur (S) to improve workability, manganese (Mn) to increase resistance and lead (Pb) to promote chipability, it is widely used in the precision mechanical small parts.

It is ideal for the realisation of components subjected to high loads and in need of high machinability on automatic or CNC latheswith diameters between 3 and 32 mm and lengths up to 250 mmas in your production.

Why use PR80 (36SMnPb14)?

1
Excellent workability
- Lead improves the chip fragmentationreducing tool wear.
- High processing speedsperfect for mass production.
- Good surface finish with no need for further treatment.
2
High mechanical strength
- Higher than common automatic steels such as AVP (11SMnPb37).
- It withstands dynamic loads and vibrations well.
- It can be quenched and tempered (hardening + tempering) to increase hardness and wear resistance.
3
Ease of heat treatment
- It can be hardened and tempered to achieve better mechanical properties.
- Cementable to increase surface hardness without losing internal toughness.
4
Good compromise between cost and performance
- Economical compared to high-end alloy steels, with superior performance to standard automatic steels.

Applications of small parts in PR80 (36SMnPb14)

Mechanical and Automotive

- Pins, shafts, bushings, structural screws.
- Components for mechanical transmissions and gearboxes.
- Parts for steering and brake systems.
Go to automotive

Hydraulics and Pneumatics

- Pistons, valves, fittings subject to high pressures.
- Components for hydraulic and compressed air systems.
Go to the pneumatic sector

Electronic and Electromechanical Sector

- Motor elements, supports and pins for speed reducers.
Go to sector

Industrial Machinery Sector

- Pins and axles for machinery subject to wear and tear.
- Parts of actuators and mechanical guides.
Go to machine park

When to avoid PR80 (36SMnPb14)?

If high corrosion resistance is required → It is not stainless, so in wet or aggressive environments it is better to use AISI 303, 304 or 316.

If good weldability is required → Lead and sulphur make soldering difficult and less resistant.

If the industry imposes lead restrictions → In food, medical or ROHS/REACH applications, it is better to use lead-free steels such as AVZ (11SMn37).

If high ductility is required → It is less tough than low-carbon steels.

L'PR80 steel (36SMnPb14) is an excellent choice for small mechanical high-strength precision, combining excellent workability and good mechanical properties. It is particularly suitable for components subject to high loads and mechanical stressbut is not suitable for applications in corrosive or lead-restricted environments.

PR80 (36SMnPb14) with galvanising treatment

The PR80 (36SMnPb14) is a automatic leaded steel characterised by high workability and good mechanical properties. Thanks to the presence of sulphur (S) and lead (Pb)It offers excellent machinability and allows well-finished surfaces with reduced tool wear.

Compared to theAVP (11SMnPb37)the PR80 has a higher carbon contentwhich makes it stronger and more durablewhile still maintaining excellent machinability. However, like all free-cutting steels, it has poor corrosion resistance, which is why it is often galvanised to protect it from oxidation and extend its life in moderately aggressive environments.

Why use galvanised PR80?

1
Excellent workability
- Easy to machine on CNC and automatic lathes at high speed.
- Short chip → Less tool wear and higher productivity.
- Excellent surface finish → Ideal for precision components.
2
Higher mechanical strength than AVP and AVZ
- Harder and more resistant → Suitable for mechanically stressed components.
- Good resistance to fatigue → Ideal for moving parts or parts subject to vibration.
3
Corrosion protection through galvanisation
- The galvanisation creates a barrier against oxidation and rusting.
- Increased durability in wet or weathered environments.
4
Cheaper alternative to stainless steels
- Cheaper than theAISI 303, 304 and 316while providing a fair amount of surface protection.

Applications of galvanised PR80 hardware

Mechanical and Automotive

- Pins, shafts, spacers, bushings and structural screws.
- Parts of transmission and steering systems.
Go to automotive

Hydraulics and Pneumatics

- Fittings, nipples and valves for hydraulic and pneumatic systems.
- Components for hydraulic pumps and cylinders.
Go to the pneumatic sector

Furnishing and Carpentry Sector

- Brackets, supports and hardware for metal structures.
- Structural components subject to mechanical stress.
Go to the furniture sector

Electromechanical and Industrial

- Pins and spacers for industrial machinery.
- Fasteners for electrical panels and metal structures.
Go to sectors

When to avoid galvanised PR80?

If high corrosion resistance is required → Galvanising offers protection, but for very aggressive environments it is better to use AISI 304 or 316.

If lead is banned → PR80 does not comply with regulations ROHS and REACH; better to opt for PR70 or AVZ.

If good weldability is required → Lead and sulphur content worsens solderability.

If the part has to withstand extreme stress → For very high loads, a stronger alloy steel is preferable.

The PR80 galvanised is an excellent compromise between workability, mechanical strength and corrosion protection. It is ideal for small mechanical and structural components in sectors such as automotive, hydraulics, pneumatics and furniturebut it is not suitable for very corrosive environments or restrictive lead regulations.

Fill in the form to get more information about PR80 (36SMnPb14)

Don't let the details slip away! Use this form to send us your specific requests, including sizes, quantities, and technical drawings, so we can provide you with customized solutions quickly.