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AVP - Fast Leaded Steel

The perfect material for high-precision, high-volume mechanical small parts, where speed of processing is essential.

Chemical composition

11SMnPb37 / 11SMnPb30

ISO Standard

1.0737 / 1.0718

L'AVP (Fast Leaded Steel)also known as 11SMnPb37is an automatic leaded steel characterised by aexcellent workability and one optimal machinability. Thanks to the addition of lead (Pb) and sulphur (S), it facilitates turning and milling operations, making it one of the most widely used materials for the production of precision mechanical small parts.

It is particularly suitable for machining on automatic lathes e CNCespecially for the manufacture of small components with diameters between 3 and 32 mm and lengths up to 250 mmas in your production.

Why use AVP (11SMnPb37)?

1
Exceptional workability
- Lead improves the chip fragmentationreducing tool wear
- High processing speedsperfect for mass production and cycle time reduction.
- Excellent surface finish without the need for additional machining
2
Good mechanical resistance
- Suitable for components with moderate loads, although not a high-strength steel
- Can be case-hardened to increase surface hardness
3
Affordable and widely available
- Low-cost material, ideal for high productions
- Excellent value for money for non-structural components

AVP applications (11SMnPb37)

Mechanical and Automotive

- Pins, bushings, screws, spacers.
- Transmission parts and small shafts.
- Components for fastening systems and joints.
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Hydraulic and Pneumatic Sector

- Fittings, nipples and small valve bodies.
- Plungers and elements for compressed air systems.
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Electrical and Electromechanical Sector

- Metal connectors and supports for electrical systems. - Parts for motors and gearboxes.
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Building and Furnishing Sector

- Hardware, handles, lock components.
- Supports for structures and fasteners.
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When to avoid AVP (11SMnPb37)?

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

If good weldability is required → Lead compromises solderability, making it difficult and unreliable.

In applications subject to high loads or prolonged fatigue → In such cases it is better to prefer alloyed or quenched and tempered steels.

If compliance with ecological regulations is required → The presence of lead can be a limit for regulated sectors (food, medical, drinking water).

L'AVP (11SMnPb37) is the perfect material for small mechanical high precision and large volumeswhere speed of processing is essential. However, its poor resistance to corrosion and high stress make it unsuitable for structural applications or aggressive environments.

AVP (11SMnPb37) with galvanising treatment

L'AVP (11SMnPb37) is a automatic leaded steel known for its excellent workabilitythanks to the addition of lead (Pb) and sulphur (S)which improve machinability and allow high-speed machining with an excellent surface finish.

However, AVP has poor corrosion resistancewhich is why it is often subjected to galvanisinga treatment that protects it from oxidation and extends its life in moderately corrosive environments.

Why use galvanised AVP?

1
Excellent workability
- High processing speed → Perfect for automatic and CNC lathes.
- Short chip → Reduces tool wear and lowers production costs.
- Good surface finish → Makes it possible to obtain components with precise tolerances.
2
Increased corrosion resistance
- The galvanisation protects steel from oxidation and rust.
- Ideal for components exposed to moisture or weathering.
- Suitable for sectors where surface protection is essential (e.g. automotive, construction, furniture).
3
Good mechanical properties
- Suitable for components that do not have to withstand extreme loads.
- High surface hardness due to galvanisation.
4
Low cost
- More economical than stainless steels and other corrosion-resistant alloy steels.

Galvanised AVP applications

Mechanical and Automotive

- Screws, bolts, bushings, pins for metal structures.
- Supports and spacers for chassis and body components.
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Hydraulics and Pneumatics

- Fittings and nipples for hydraulic and pneumatic circuits.
- Components for low-pressure systems.
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Furnishing and Construction Sector

- Hardware and metal accessories subject to moisture.
- Brackets and supports for furniture and metal structures.
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Electronic and Electromechanical Sector

- Pins, spacers and supports for switchgear.
- Structural parts of electronic devices.
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When to avoid galvanised AVP?

If high mechanical strength is required → Not suitable for high loads or high-wear environments. Better PR80 or PR70.

If extreme corrosion resistance is required → Galvanising protects, but is not comparable to the AISI 303, 304 or 316 stainless steel.

If it is necessary to weld the part → The AVP does not weld well and the galvanising must be removed before welding.

If lead is banned in the area of application → Does not comply with environmental regulations such as ROHS and REACH (better AVZ or PR70).

L'Galvanised AVP is an economical and versatile solution for small mechanical high workability and moderate corrosion protection. It is ideal for mechanical, hydraulic, building and furniture componentsbut it is not suitable for heavy-duty use or in very corrosive environments, where a stronger stainless steel or alloy steel is preferable.

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