ETG 100 Free Cutting Steel
We are ETG 100 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 supplying high-performance free-cutting steels worldwide. We specialize in manufacturing and supplying ETG 100 Free Cutting Steel (ETG 100 / Ultra High Strength Mechanical Steel) that meets demanding engineering standards for heavy-duty drive shafts, hydraulic piston rods, high-pressure pump spindles, gear pinions, and multi-spindle CNC turned components. ETG 100 is a premium special free-cutting mechanical steel engineered to deliver ultra-high yield strength (min 865 MPa) and high tensile strength (960–1100 MPa) directly in the cold drawn as-supplied bar condition (+C), eliminating the need for post-machining quench and temper heat treatment. Formulated with 0.44–0.48% Carbon, 1.35–1.65% Manganese, and high Sulphur (0.24–0.33%), ETG 100 achieves 95% machinability rating, excellent chip breaking, and high surface finish on high-speed CNC lathes. In cold drawn and strain-relieved condition, ETG 100 provides exceptional straightness, tight h9/h10 tolerances, and uniform mechanical properties across the entire bar cross-section. It is widely specified across heavy automotive drive axles, hydraulic cylinder rods, high-tensile studs, pump shafts, and mining machinery parts.
Our ETG 100 Free Cutting Steels are 100% Prime – Tested & Guaranteed, with precise chemical balance and strict quality control. Every batch is supplied with proper Mill Test Certificates (MTC) per EN 10204 3.1 certification. STEEL MART ensures prompt global delivery and technical support.
What is ETG 100 Free Cutting Steel?
ETG 100 Free Cutting Steel is an ultra-high strength special engineering steel developed to offer 960–1100 MPa tensile strength, 865 MPa minimum yield strength, and 95% machinability rating without requiring post-machining heat treatment. Formulated with high carbon (0.44–0.48%), elevated manganese (1.35–1.65%), and high sulphur (0.24–0.33%), ETG 100 incorporates evenly distributed Manganese Sulphide (MnS) inclusions that break chips instantly during high-speed CNC turning, drilling, and keyway milling. Its unique strain-relieved micro-structure prevents bar bowing, warpage, or residual stress relief distortion during heavy machining.
95% Machinability
High sulphur inclusions allow clean chip fragmentation at fast cutting speeds.
960–1100 MPa Tensile
Ultra-high mechanical strength in as-delivered bar condition (+C).
865 MPa Min Yield
High yield strength eliminates secondary heat treatment and distortion.
0.24–0.33% Sulphur
Manganese Sulphide inclusions provide superior internal chip breakage.
Zero Distortion
Strain relieved structure guarantees straightness during deep slot milling.
Drive Shafts & Spindles
Preferred choice for automotive drive shafts, hydraulic piston rods, & pump spindles.
Why Choose STEEL MART for ETG 100 Free Cutting Steel
STEEL MART is an established stockist and supplier of ETG 100 Free Cutting Steel with decades of experience serving high-precision engineering sectors. We stock prime ETG 100 round, hexagon, and square bars in cold drawn and strain relieved condition to meet urgent client demands.
Every consignment of ETG 100 Free Cutting Steel is supplied with complete Mill Test Certificates (EN 10204 3.1) verifying chemical composition, tensile strength, yield strength, and dimensional tolerances.
Chemical Composition of ETG 100 Free Cutting Steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.44 – 0.48 % |
| Manganese (Mn) | 1.35 – 1.65 % |
| Sulphur (S) | 0.24 – 0.33 % |
| Silicon (Si) | 0.15 – 0.35 % |
| Phosphorus (P) | 0.040 % Max |
High Carbon (0.44-0.48%) and Manganese (1.35-1.65%) combined with High Sulphur deliver maximum strength and 95% machinability.
Equivalent Grades of ETG 100 Free Cutting Steel
| Standard | Equivalent Grade |
|---|---|
| Special Brand | ETG 100 Special Mechanical Steel |
| DIN / EN | 44SMn28 / 1.0727 Ultra-High Strength |
| AISI / SAE | SAE 1144 / Stressproof Equivalent |
| BS 970 | 225M44 High Strength Variant |
Mechanical Properties of ETG 100 Free Cutting Steel
ETG 100 delivers ultra-high mechanical strength in cold drawn and strain relieved (+C) condition.
Manufacturing & Processing of ETG 100 Steel
ETG 100 is produced through micro-alloyed hot rolling, cold drawing, and strain relieving to eliminate internal stresses.
Hot Rolling & Micro-Alloying
Hot worked under controlled temperatures to establish precise grain size and manganese sulphide inclusions.
Cold Drawing (+C)
Cold drawn through precision dies to achieve h9/h10 bar tolerances and high yield strength.
Thermal Strain Relieving
Strain relieving treatment ensures zero warpage or distortion during keyway and thread machining.
ETG 100 Industry Applications
Heavy Hydraulic Cylinder Rods
High-pressure hydraulic piston rods, cylinder shafts, & valve spindles.
Automotive Heavy Drive Axles
Truck drive axles, splined drive shafts, steering pinions, & transmission gears.
High-Pressure Pump Spindles
High-speed pump shafts, impeller spindles, & industrial motor armatures.
Mining & Construction Machinery
Excavator pivot shafts, rock drill lead screws, & heavy implement studs.
Availability and Customization
| Profiles Available | Round Bars, Hexagon Bars, Square Bars |
| Size Range | Round: 6 mm to 120 mm | Hex: 8 mm to 65 mm AF |
| Condition | Cold Drawn & Strain Relieved (+C) |
| Tolerances | h9, h10 precision bar tolerances per ISO 286 |
| Certification | 100% Prime Mill Test Certificate (EN 10204 3.1) |
Enquire For Rates ✉
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ETG 100 Free Cutting Steel is an ultra-high strength special mechanical steel engineered to deliver 960–1100 MPa tensile strength, 865 MPa minimum yield strength, and 95% machinability rating without heat treatment warpage. Supplied by STEEL MART with strict quality assurance and full EN 10204 3.1 Mill Test Certification, ETG 100 is the premier choice for heavy-duty turned components.
Frequently Asked Questions
ETG 100 provides a minimum yield strength of 865 MPa in cold drawn strain-relieved condition (+C).
Heavy automotive drive shafts, hydraulic piston rods, high-pressure pump spindles, and precision gear pinions demanding ultra-high strength without heat treatment distortion.