12L14 Free Cutting Steel
We are 12L14 Free Cutting Steel Manufacturers, Suppliers, and Exporters in Mumbai, India. STEEL MART is an ISO 9001:2015 certified company established in 1986, with decades of experience in supplying high-quality free-cutting steel products to various industries. We specialize in manufacturing and supplying 12L14 Free Cutting Steels (AISI 12L14 / SAE 12L14 / DIN 11SMnPb30 / W.Nr 1.0718 / BS 970 220M07 Pb / EN 1A L) that meet national and international quality standards for ultra-high-speed automatic screw machine components, hydraulic hose adaptors, precision turned fasteners, bushings, and high-volume CNC turned parts. 12L14 Free Cutting Steel is a world-standard leaded resulphurized and rephosphorized low-carbon free-machining engineering steel specified under American Standards (AISI / SAE / ASTM A29) for maximum cutting speeds, superior surface finish, and minimal tool wear on automatic multi-spindle lathes. Formulated with low Carbon (0.15% max), Manganese (0.85–1.15%), Sulphur (0.26–0.35%), Phosphorus (0.04–0.09%), and micro-alloyed Lead (0.15–0.35% Pb), 12L14 achieves an extraordinary 160% machinability rating (relative to AISI 1212 benchmark). Microscopic lead particles act as internal lubricants between tool cutting edges and chip interfaces, drastically reducing tool wear, cutting friction, and power consumption. Supplied in cold drawn (+C), turned, or centerless ground condition, 12L14 provides tight dimensional tolerances (h9/h10), high bar straightness, and a mirror-smooth surface finish without burrs or edge drag. Because of its unmatched high-speed machining efficiency, 12L14 Steel is universally specified across high-volume automotive component turning, hydraulic connector production, electrical hardware, and precision turned parts manufacturing.
Our 12L14 Free Cutting Steels are 100% Prime – Tested & Guaranteed, ensuring precise chemical composition, dimensional accuracy, and consistent machinability. Each product is supplied with proper Mill Test Certificates (MTC) confirming compliance with AISI / SAE / ASTM standards with EN 10204 3.1 certification. STEEL MART follows strict quality control procedures and ensures timely delivery.
What is 12L14 Free Cutting Steel?
12L14 Free Cutting Steel (AISI 12L14 / SAE 12L14 / DIN 11SMnPb30 / W.Nr 1.0718 / BS 970 220M07 Pb / EN 1A L) is a leaded resulphurized and rephosphorized low-carbon unalloyed free-machining steel specified under American (AISI / SAE) standards. Formulated with max 0.15% Carbon, 0.85–1.15% Manganese, 0.26–0.35% Sulphur, 0.04–0.09% Phosphorus, and 0.15–0.35% Lead, 12L14 is the industry benchmark for maximum machining efficiency on high-speed CNC lathes and multi-spindle automatic screw machines. The addition of lead forms microscopic internal lubricants that reduce friction between tool cutting edges and turnings, preventing built-up edge formation and reducing cutting forces. In cold drawn supply condition (+C), 12L14 provides high bar straightness, tight h9/h10 dimensional tolerances, and tensile strength between 390 and 540 MPa. It is universally specified for precision turned pins, hydraulic hose adaptors, electrical terminal posts, bushings, threaded studs, and high-volume automotive turned hardware.
160% Machinability
Maximum cutting speed potential on high-rpm automatic screw machines.
0.15–0.35% Lead
Micro-alloyed lead acts as an internal solid lubricant, eliminating tool drag.
Pristine Surface
Delivers smooth, burr-free surfaces without built-up edge formation.
390–540 MPa Tensile
Cold drawn (+C) bar condition offers enhanced tensile strength & bar straightness.
Extended Tool Life
Lower cutting friction significantly prolongs carbide insert life and lowers downtime.
Precision Fasteners
Universal choice for high-volume threaded bolts, nuts, studs, & hydraulic nipples.
Why Choose STEEL MART for 12L14 Free Cutting Steel
STEEL MART is the preferred choice for purchasing 12L14 Free Cutting Steel due to its strong reputation for quality and reliability. With over 40 years of experience in the steel industry, the company ensures that every product meets strict industry standards. The company follows strict quality inspection procedures to ensure that every 12L14 Free Cutting Steel product meets international standards.
Each product is carefully tested to ensure durability, strength, and performance. Customers trust STEEL MART for consistent quality, competitive pricing, and timely delivery. The company maintains a large inventory to meet urgent and bulk requirements efficiently. In addition to 12L14 Free Cutting Steels, STEEL MART also supplies a wide range of leaded, resulphurized, alloy steel, and carbon steel products for various industrial applications.
Chemical Composition of 12L14 Free Cutting Steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.15 % Max |
| Manganese (Mn) | 0.85 – 1.15 % |
| Sulphur (S) | 0.26 – 0.35 % |
| Phosphorus (P) | 0.04 – 0.09 % |
| Lead (Pb) | 0.15 – 0.35 % |
| Silicon (Si) | 0.05 % Max |
Micro-alloyed Lead (0.15-0.35%) and Sulphur (0.26-0.35%) combine to deliver 160% high-speed machinability.
Equivalent Grades of 12L14 Free Cutting Steel
| Standard | Equivalent Grade |
|---|---|
| AISI / SAE | 12L14 / AISI 12L14 / SAE 12L14 |
| DIN / EN | 11SMnPb30 / 1.0718 |
| BS 970 | 220M07 Pb / EN 1A L |
| JIS | SUM24L |
| ISO | 11SMnPb30 |
These international equivalents ensure global engineering specification compatibility.
Mechanical Properties of 12L14 Free Cutting Steel (Cold Drawn)
The mechanical properties of 12L14 Free Cutting Steels make them ideal for high-speed lathe turning, automatic screw machine components, and precision threaded fasteners. In cold drawn condition (+C), 12L14 delivers uniform mechanical strength and high bar straightness.
Manufacturing & Cold Processing of 12L14 Free Cutting Steel
12L14 Free Cutting Steel bars undergo hot rolling with lead additions, descaling, precision cold drawing, and stress relieving to establish dimensional accuracy and bar straightness.
Hot Rolling & Lead Injection
Primary hot rolling of steel with uniform micro-dispersion of elemental lead particles.
Shot Blasting & Pickling
Surface descaling to remove oxide scale prior to cold drawing operations.
Precision Cold Drawing (+C)
Drawn through precision carbide dies to achieve tight h9 / h10 dimensional tolerances.
Straightening & Cut-to-Length
Multi-roll reel straightening and precision saw cutting to customer specification.
12L14 Industry Applications
12L14 Free Cutting Steels are widely used across High-Speed Screw Machining, Automotive Fasteners, Hydraulic Fittings, Electrical Terminals, and General Engineering Spares.
Precision Screw Machine Parts
High-volume turned components, automatic lathe pins, inserts, spacers, & precision bushings.
Threaded Fasteners & Studs
Standard nuts, bolts, set screws, threaded rods, tie bars, & automotive studs.
Hydraulic Fittings & Couplings
Hose nipples, hydraulic adaptors, pipe union fittings, valve stems, & pneumatic connectors.
Automotive Precision Components
Control rod pins, wiper mechanism shafts, door latch components, & instrument cluster inserts.
Electrical Hardware & Terminals
Electrical connector pins, terminal posts, switchgear shafts, & earth grounding rods.
Textile & Appliance Spares
Spinning machine spindles, loom pins, washing machine shaft inserts, & hardware fittings.
Availability and Customization
At STEEL MART, we supply 12L14 Free Cutting Steels in a wide range of sizes and specifications.
| Profiles Available | Round Bars, Hexagon Bars, Square Bars, & Flat Bars |
| Diameter / Size | Round: 5 mm to 100 mm | Hex: 6 mm to 75 mm AF | Square: 6 mm to 50 mm |
| Condition | Supplied in Cold Drawn (+C), Centerless Ground, or Turned condition |
| Length | Standard lengths from 3 meters to 6 meters |
| Tolerances | h9, h10, or h11 precision drawn tolerance per ISO / DIN 175 |
| Customization | Band-saw cut-to-length and chamfered bar ends available upon request |
| Certification | Supplied with 100% Prime Mill Test Certificate (EN 10204 3.1) |
Our strict quality control ensures consistent chemical composition and machining performance.
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12L14 Free Cutting Steel (AISI 12L14 / SAE 12L14 / DIN 11SMnPb30 / W.Nr 1.0718 / BS 970 220M07 Pb / EN 1A L) is the world benchmark leaded resulphurized and rephosphorized low-carbon free-machining steel widely specified across automatic screw machining, precision turned components, hydraulic hose adaptors, threaded fasteners, electrical pins, and automotive hardware. Combining 0.15–0.35% lead addition for internal lubrication, 160% machinability rating, minimal tool wear, and high bar straightness in cold drawn condition (+C), it delivers maximum throughput and superior surface finish on high-speed CNC lathes. Supplied by STEEL MART with strict quality inspection and full EN 10204 3.1 Mill Test Certification, 12L14 Free Cutting Steel is an exceptional choice for mass production turning.
Frequently Asked Questions
Common answers regarding 12L14 Free Cutting Steel specifications and parameters.
12L14 contains max 0.15% Carbon, 0.85–1.15% Manganese, 0.26–0.35% Sulphur, 0.04–0.09% Phosphorus, 0.15–0.35% Lead (Pb), and max 0.05% Silicon.
Lead addition (0.15-0.35% Pb) acts as an internal solid lubricant, dramatically reducing cutting friction between the tool tip and chip, yielding a 160% machinability rating and unmatched tool insert life.
12L14 (AISI 12L14 / SAE 12L14) is equivalent to European DIN 11SMnPb30 (W.Nr 1.0718) and British BS 970 220M07 Pb (EN 1A L), offering matching leaded resulphurized chemical composition.
Ultra-high-speed screw machine turned components, nuts, bolts, studs, hydraulic hose adaptors, electrical terminal pins, control rods, and instrument fittings.
STEEL MART supplies 12L14 in round bars, hexagon bars, square bars, and flat bars in Cold Drawn (+C), Centerless Ground, or Turned condition with mill test certificates.