Lead For Free Machining Steels

LEADED STEEL:

No ImageLead is added to steels for improving machinability. Lead is only slightly soluble in liquid or solid steel and, when added, some will be present as a dispersion of discrete but preferably submicroscopic metallic lead inclusions.

In the cut, lead acts as a lubricant between the cutting tool and the workpiece, resulting in longer tool life. This lubricity reduces friction in the secondary shear zone as the chip slides over the face of the cutter. It also helps create more manageable chip configurations by helping the chip to curl and break rather than string out into birds' nests. Lead has a melting point around 621º F—well below steel. As heat builds in the cut, the lead is able to leech out of the steel and lubricate the cutter/part interface. This reduces the heat generated in all three shear zones and leads to longer tool life and the possibility of  increased speeds and feeds.

The concentration of lead, sufficient to produce the desired free machining properties, is in the range of 0.15-­0.35%. Lead is used alone or in combination with bismuth, tellurium or selenium depending upon the application requirement. Lead can be used in the form of round shots or cored wire. The recovery of lead with shots addition ranges between 60-­75% whereas in case of cored wire the recovery is higher i.e. between 75-­90%.

Although lead’s boiling point is above normal temperature the metal does have a high vapor pressure and addition will be accomplished by considerable fuming. These vapors are toxic and sufficient venting should be provided. swiss replica watches

Lead Alloy Specification:

Alloy
Grade
Chemical Composition {%)  
Pb Cu
{Max)
Sn
{Max)
As
{Max)
Sb
{Max)
Zn
{Max)
Bi
{Moxl
Fe
{Max)
99.97 99.97 0.005 0.()()5 0.05 0.003 0.002 0.016 0.002

Physical properties:

Grade Specific Gravity (gm/CC) Melting Range (0C) B.P (0C)
99.9 % 11.34 327 1750

Shape & Size:

  Std. Size (mm) Std. Weight (Kg)
lnaot   20-25
Granules 0.04-2  
Powder 0.04-0.5  
Shots 0 -1.5, 0.2 - 2  
Cored Wire See the Cored wire specification section  
Wooden Box Steel Drum HDPE Jumbo Bag
*50 Kg * *50 Kg* *1 MT*

*Standard Packing, #Optional Packing

Use Dry & Cool Place to store the material to avoid contamination and reaction with moisture. Addition agents should be kept dry in sealed containers. http://www.replicamaker.net

Lead addition will be accompanied by considerable fuming. These vapors are toxic and must be vented to keep atmospheric concentrations below the permissible TLV-­TWA limit of 50μg/m3 of air. Residual blood lead levels of workers should be checked periodically to keep them within the OSHA  recommended maximum value of 40μg/100 g. Material Safety Data Sheet can be supplied on demand.

Grade

Powder Chemical Grade Composition (%)

Pb(Min) Oths. (Max)
Pb 99 99 1.0

 

Powder specification
Grade density (g/cm3) Melting
Point
(°C)
Boiling
Point
(°C)
Size (mm)
Pb 99 11.34 327 1740 -­2.0+0.212
Strip Specification
Grade Diameter
(0, mm)
Thickness (mm)
EEDD IS-­513

9±0.5

13±0.2

16±0.2

0.40± 0.03

0.40± 0.03

0.40± 0.03

Wire Characteristics
Grade Diameter ( 0, mm) Shape Powder Fill (gm/mt)
Pb 99

9±0.5

13±0.2

16±0.2

Round

Round

Round

 

460 ± 30

1000 ± 50

1400 ± 50

 

Coil Specification (Flipping Coil – Horizontal & Vertical)
Details

9 mm

13 mm 16 mm Coil Identification

 

F2-­05 F2-­10 F2-­05 F2--­10 F2-­10
Powder Weight
(MT)
0.500 1.000

0.500

1.000

1.000

All coils are color coded and fixed with a detailed sticker clearly displaying details such as coil no., powder content, strip weight, gross weight density & length. A fluorescent sticker displays the name of the product in bold letters on the outer diameter of the coil.

Handling

No metal sling, chain or rod is to be used across the ID of the coil for handling as it may damage the coil. Use only polyester, synthetic slings, fork lift/tractor to handle the coil. The pallet is an integral part of the coil and it is to be removed till the coil is consumed.

Shelf Life

Follow the shelf life period specified by MINEX








Strip Weight
(MT)
0.140 0.280 0.095 0.190 0.175
Net Weight
(MT)
0.640 1.280 0.595 1.190 1.175
Length (Mtrs) 1086 2173 500 1000 715
Internal
Diameter (mm)
650 650 650 650 650
External
Diameter (mm)
760 860 760 840 900
Height (mm) 630 630 630 630 630
Packing Storage & Safety

Packed in flipping cage and mounted on wooden / mild steel pallet and Strapped with pallet horizontally or vertically. All coils are wrapped in stretch film & palletized.

To be stored in dry & covered area away from heat and moisture. Material Safety data sheet can be Supplied on demand.

Grade

Powder Chemical Grade Composition (%)

Pb CaCO3 Oths. (Max)
PbCaCO3 90-­93 90-­93 5-­7 1.0
PbCaCO3 93-­95 93-­95 5-­7 1.0
Physical Properties
Grade Density (gm/CC) Melting
Point
(°C)
Boiling
Point
(°C)
Size (mm)
Pb CaCO3

Pb-­ 11.3

CaCO3-­ 2.83

327

825 (Decomposition Point)

1740

-­2.0+0.212

-­1.4+0.212

  Std. Size (mm) Std. Weight (Kg)
Powder Pb: -­2.0+0.212, CaCO3: -­1.4+0.212  
Cored Wire See the Cored wire specification section  
Wooden Box Steel Drum HDPE Jumbo Bag
*50 Kg * *50 Kg* *1 MT*

*Standard Packing, #Optional Packin

Use Dry & Cool Place to store the material to avoid contamination and reaction with moisture. Addition agents should be kept dry in sealed containers.

Lead addition will be accompanied by considerable fuming. These vapors are toxic and must be vented to keep atmospheric concentrations below the permissible TLV-­TWA limit of 50μg/m3 of air. Residual blood lead levels of workers should be checked periodically to keep them within the OSHA  recommended maximum value of 40μg/100 g. Material Safety Data Sheet can be supplied on demand.

Grade

Powder Chemical Grade Composition (%)

Pb CaCO3 Oths. (Max)
PbCaCO3 90-­93 90-­93 5-­7 1.0
PbCaCO3 93-­95 93-­95 5-­7 1.0
Powder Specification
Grade Density (gm/CC) Melting
Point
(°C)
Boiling
Point
(°C)
Size (mm)
Pb CaCO3

Pb-­ 11.3

CaCO3-­ 2.83

327

825 (Decomposition Point)

1740

-­2.0+0.212

-­1.4+0.212

 

Strip Specification

Grade

Diameter
(0, mm)

Thickness (mm)

EEDD IS-­513

9±0.5

13±0.2

16±0.2

0.40± 0.03

0.40± 0.03

0.40± 0.03

 

Wire Characteristics

Grade

Diameter ( 0, mm)

Shape

Powder Fill (gm/mt)

Pb 99

9±0.5

13±0.2

16±0.2

Round

Round

Round

 

460 ± 30

1000 ± 50

1400 ± 50

Coil Specification (Flipping Coil – Horizontal & Vertical)

Details

9 mm

13 mm

16 mm

Coil Identification

 

F2-­05

F2-­10

F2-­05

F2--­10

F2-­10

Powder Weight
(MT)

0.500

1.000

0.500

1.000

1.000

All coils are color coded and fixed with a detailed sticker clearly displaying details such as coil no., powder content, strip weight, gross weight density & length. A fluorescent sticker displays the name of the product in bold letters on the outer diameter of the coil.

Handling

No metal sling, chain or rod is to be used across the ID of the coil for handling as it may damage the coil. Use only polyester, synthetic slings, fork lift/tractor to handle the coil. The pallet is an integral part of the coil and it is to be removed till the coil is consumed.

Shelf Life

Follow the shelf life period specified by MINEX



Strip Weight
(MT)

0.140

0.280

0.095

0.190

0.175

Net Weight
(MT)

0.640

1.280

0.595

1.190

1.175

Length (Mtrs)

1086

2173

500

1000

715

Internal
Diameter (mm)

650

650

650

650

650

External
Diameter (mm)

760

860

760

840

900

Height (mm)

630

630

630

630

630

Packing

Storage & Safety

Packed in flipping cage and mounted on wooden / mild steel pallet and Strapped with pallet horizontally or vertically. All coils are wrapped in stretch film & palletized.

To be stored in dry & covered area away from heat and moisture. Material Safety data sheet can be Supplied on demand.