EN 15AM Free Cutting Steel
We are EN 15AM 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 EN 15AM Free Cutting Steels (BS 970 216M28 / 226M28 / EN15AM / AISI 1137 / SAE 1137 / 30SMn28 / W.Nr 1.0725) that meet national and international quality standards for high-tensile turned shafts, heavy drive axles, steering components, hydraulic fittings, and precision CNC parts. EN 15AM Free Cutting Steel is a high-manganese resulphurized medium carbon engineering steel specified under British Standards (BS 970) for applications requiring high tensile strength, high core toughness, and outstanding machinability. Formulated with 0.25–0.35% Carbon, elevated Manganese (1.20–1.60%), and controlled Sulphur (0.12–0.20%), EN 15AM forms well-dispersed Manganese Sulphide (MnS) inclusions that act as internal chip breakers during high-rpm turning, drilling, and thread milling. The high manganese content significantly enhances hardenability and impact resistance compared to standard free-cutting grades. In cold drawn (+C), normalized, or quenched and tempered (+QT) supply condition, EN 15AM provides excellent bar straightness, tight dimensional tolerances, and high yield strength (420–560 MPa). It also responds exceptionally well to induction hardening (52–56 HRC) for heavy wear applications. Because of its superior strength, toughness, and machining performance, EN 15AM Steel is widely specified across commercial vehicle steering components, drive axles, high-tensile studs, hydraulic fittings, and heavy machinery spares.
Our EN 15AM 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 BS 970 / EN 10087 standards with EN 10204 3.1 certification. STEEL MART follows strict quality control procedures and ensures timely delivery.
What is EN 15AM Free Cutting Steel?
EN 15AM Free Cutting Steel (BS 970 216M28 / 226M28 / EN15AM / AISI 1137 / SAE 1137 / 30SMn28 / W.Nr 1.0725) is a high-manganese resulphurized medium carbon free-machining engineering steel engineered for heavy mechanical components requiring superior core toughness, high tensile strength, and excellent cutting speed. Formulated with 0.25–0.35% Carbon, 1.20–1.60% Manganese, and 0.12–0.20% Sulphur, EN 15AM offers significantly higher hardenability and impact toughness than standard free-cutting steels. Microscopic Manganese Sulphide (MnS) inclusions act as chip breakers during turning, milling, and thread cutting, enabling smooth surface finishes and reduced cutting tool wear. In cold drawn (+C) or quenched and tempered (+QT) supply condition, EN 15AM provides high tensile strength (600–800 MPa) and yield strength (420–560 MPa). It responds exceptionally well to induction hardening (52–56 HRC) for heavy wear applications. It is widely specified for automotive steering components, drive shafts, hydraulic connectors, high-tensile studs, crankshafts, and heavy machinery spares.
85% Machinability
Resulphurized MnS inclusion structure allows fast CNC turning & threading.
1.20-1.60% Manganese
High Mn content delivers exceptional core toughness & deep hardenability.
600–800 MPa Tensile
Achieves high tensile & yield strength for demanding drive line components.
52–56 HRC Hardness
Responds to localized induction hardening for high wear resistance on journals & pins.
High Bar Straightness
Cold drawn (+C) supply condition provides bright surface finish & tight bar tolerances.
Drive Line & Steering
Ideal choice for commercial vehicle steering worms, drive axles, studs, & fittings.
Why Choose STEEL MART for EN 15AM Free Cutting Steel
STEEL MART is the preferred choice for purchasing EN 15AM 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 EN 15AM 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 EN 15AM Free Cutting Steels, STEEL MART also supplies a wide range of resulphurized, alloy steel, and carbon steel products for various industrial applications.
Chemical Composition of EN 15AM Free Cutting Steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.25 – 0.35 % |
| Manganese (Mn) | 1.20 – 1.60 % |
| Sulphur (S) | 0.12 – 0.20 % |
| Silicon (Si) | 0.10 – 0.35 % |
| Phosphorus (P) | 0.050 % Max |
High Manganese (1.20-1.60%) and Sulphur (0.12-0.20%) combine to deliver superior toughness and high-speed machining.
Equivalent Grades of EN 15AM Free Cutting Steel
| Standard | Equivalent Grade |
|---|---|
| BS 970 | 216M28 / 226M28 / EN15AM |
| DIN / EN | 30SMn28 / 1.0725 |
| AISI / SAE | AISI 1137 / SAE 1137 |
| JIS | SUM32 |
| ISO | 30SMn28 |
These international equivalents ensure global engineering specification compatibility.
Mechanical Properties of EN 15AM Free Cutting Steel (Cold Drawn / +QT)
The mechanical properties of EN 15AM Free Cutting Steels make them ideal for automotive drive axles, steering shafts, hydraulic fittings, high-tensile studs, and crankshafts. In cold drawn (+C) or +QT condition, EN 15AM delivers high tensile strength and core toughness.
Manufacturing & Processing of EN 15AM Free Cutting Steel
EN 15AM Free Cutting Steel bars undergo controlled hot rolling, descaling, precision cold drawing (+C), and optional heat treatment to achieve optimal mechanical properties.
Hot Rolling (1050°C - 1150°C)
Hot worked with high manganese alloying to ensure uniform MnS inclusion distribution and refine grain size.
Shot Blasting & Descaling
Surface descaling to remove oxide scale prior to cold drawing operations.
Precision Cold Drawing (+C)
Drawn through carbide dies to elevate yield strength and establish h9 / h10 bar tolerances.
Induction / Quench & Temper (+QT)
Quenched & tempered or induction hardened to achieve surface case hardness up to 52–56 HRC.
EN 15AM Industry Applications
EN 15AM Free Cutting Steels are widely used across Commercial Vehicle Steering Worms, Drive Axles, High-Tensile Studs, Hydraulic Connectors, and Crankshafts.
Automotive Steering & Drive Axles
Steering worm shafts, heavy-duty drive axles, steering knuckles, & transmission spindles.
High-Tensile Studs & Bolts
High-strength turned studs, cylinder head bolts, wheel studs, & tie rods.
Hydraulic Connectors & Valves
High-pressure hydraulic adaptors, valve spools, union fittings, & pneumatic stems.
Engine Crankshafts & Pinions
High-rpm engine crankshafts, drive pinions, spur gears, & splined drive shafts.
Machine Tool Spindles
Lathe spindles, milling arbors, indexing pins, & precision guide shafts.
Agricultural & Construction Spares
Tractor PTO shafts, excavator pins, harvester shafts, & heavy implement spares.
Availability and Customization
At STEEL MART, we supply EN 15AM 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 250 mm | Hex: 6 mm to 75 mm AF | Square: 6 mm to 100 mm |
| Condition | Supplied in Cold Drawn (+C), Normalized, or Quenched & Tempered (+QT) 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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EN 15AM Free Cutting Steel (BS 970 216M28 / 226M28 / EN15AM / AISI 1137 / SAE 1137 / 30SMn28 / W.Nr 1.0725) is a premier high-manganese resulphurized medium carbon free-cutting engineering steel widely specified across commercial vehicle steering components, drive axles, hydraulic adaptors, high-tensile studs, and engine crankshafts. Combining high manganese content (1.20–1.60%) for high core toughness and deep hardenability, 85% machinability rating, excellent chip breaking capabilities, and induction hardening response (52–56 HRC), it provides superior performance for high-speed CNC turned components demanding high mechanical strength. Supplied by STEEL MART with strict quality inspection and full EN 10204 3.1 Mill Test Certification, EN 15AM Steel is an outstanding high-strength free-cutting grade.
Frequently Asked Questions
Common answers regarding EN 15AM Free Cutting Steel specifications and parameters.
EN 15AM contains 0.25–0.35% Carbon, 1.20–1.60% Manganese, 0.12–0.20% Sulphur, 0.10–0.35% Silicon, and max 0.050% Phosphorus.
High Manganese significantly increases through-hardenability, core tensile strength (600–800 MPa), and Charpy impact toughness while reacting with Sulphur to form beneficial MnS inclusions for free cutting.
EN 15AM (BS 970 216M28) is equivalent to American AISI 1137 / SAE 1137 and European 30SMn28 (W.Nr 1.0725), offering matching high-manganese resulphurized chemistry and mechanical properties.
Commercial vehicle steering worm shafts, drive axles, high-tensile studs, hydraulic fittings, engine crankshafts, and heavy CNC turned components.
STEEL MART supplies EN 15AM in round bars, hexagon bars, square bars, and flat bars in Cold Drawn (+C), Normalized, or Quenched & Tempered (+QT) condition with EN 10204 3.1 mill test certificates.