ETG 88 Free Cutting Steel
We are ETG 88 Free Cutting Steel Manufacturers, Suppliers, and Exporters in Mumbai, India. STEEL MART is an ISO 9001:2015 certified company established in 1986, supplying high-quality high-strength free-cutting steel products globally. We specialize in manufacturing and supplying ETG 88 Free Cutting Steel (ETG 88 / High Strength Mechanical Steel) that meets national and international standards for high-tensile shafts, precision gears, hydraulic connectors, drive spindles, and multi-spindle automatic CNC lathe components. ETG 88 is a high-performance special free-cutting engineering steel manufactured through a proprietary thermo-mechanical treatment that delivers high yield strength (680–750 MPa) and uniform tensile strength (880–980 MPa) directly in the as-received condition, eliminating secondary heat treatment and thermal warpage. Formulated with controlled carbon, manganese, and micro-alloying elements, ETG 88 achieves excellent 90% machinability rating, short chip fragmentation, and minimal tool wear on high-speed CNC turning centers. It maintains tight h9/h10 dimensional tolerances, low residual stress, and high fatigue endurance limit across all bar diameters. ETG 88 Free Cutting Steel is widely specified across automotive drive systems, textile machinery spindles, hydraulic fittings, high-tensile fasteners, and precision instrument shafts requiring superior mechanical properties without heat treatment distortion.
Our ETG 88 Free Cutting Steels are 100% Prime – Tested & Guaranteed, with precise chemical composition, uniform grain structure, and consistent machinability. Each batch is supplied with proper Mill Test Certificates (MTC) per EN 10204 3.1 certification. STEEL MART ensures strict quality inspection and prompt worldwide delivery.
What is ETG 88 Free Cutting Steel?
ETG 88 Free Cutting Steel is a high-tensile, high-strength special engineering steel engineered to combine exceptional machinability with high yield and tensile strength directly in the as-supplied bar condition. Unlike conventional free-cutting steels that require post-machining heat treatment to achieve high strength, ETG 88 provides 680–750 MPa yield strength and 880–980 MPa tensile strength straight off the lathe. Manufactured with precise micro-alloying and controlled thermo-mechanical rolling, ETG 88 exhibits excellent chip breakage, high tool life, and distortion-free machining across long turned shafts, keyways, and splines.
90% Machinability
Designed for fast CNC turning speeds with rapid chip fragmentation.
880–980 MPa Tensile
High mechanical strength in as-delivered condition without quenching.
High Yield Strength
680–750 MPa yield strength withstands severe torsional and axial loads.
Zero Thermal Warpage
Eliminating heat treatment prevents dimensional distortion on keyways & threads.
h9 / h10 Tolerances
Precision cold drawn finish ensures exact diameter uniformity for automatic bar feeders.
High Fatigue Limit
Uniform micro-structure provides superior dynamic fatigue endurance for rotating shafts.
Why Choose STEEL MART for ETG 88 Free Cutting Steel
STEEL MART is a leading supplier of ETG 88 Free Cutting Steel bars with over 40 years of engineering supply experience. We ensure that every batch of ETG 88 complies strictly with international quality standards, offering consistent mechanical properties, precise straightness, and clean surface finish.
Our ready stock of ETG 88 round, hexagon, and square bars enables rapid delivery across India and international markets. Every order is supplied with 100% prime Mill Test Certificates (EN 10204 3.1) confirming complete chemical and mechanical compliance.
Chemical Composition of ETG 88 Free Cutting Steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.40 – 0.46 % |
| Manganese (Mn) | 1.25 – 1.55 % |
| Sulphur (S) | 0.20 – 0.30 % |
| Silicon (Si) | 0.10 – 0.30 %|
| Phosphorus (P) | 0.040 % Max |
Balanced carbon and manganese content combined with sulfur deliver high mechanical strength and excellent machinability.
Equivalent Grades of ETG 88 Free Cutting Steel
| Standard | Equivalent Grade |
|---|---|
| Special Brand | ETG 88 Special Mechanical Steel |
| DIN / EN | 44SMn28 High Strength Variant |
| AISI / SAE | SAE 1144 Strain Relieved Equivalent |
| BS 970 | 225M44 High Strength Variant |
ETG 88 replaces quench-and-tempered alloy steels in precision turning applications.
Mechanical Properties of ETG 88 Free Cutting Steel
ETG 88 provides high tensile and yield strength in cold drawn and thermo-mechanically treated bar condition (+C).
Manufacturing & Processing of ETG 88 Steel
ETG 88 is processed through controlled rolling, precision cold drawing, and strain relieving to eliminate internal stresses.
Controlled Thermo-Mechanical Rolling
Hot rolling with micro-alloying to establish refined grain size and uniform inclusion distribution.
Precision Cold Drawing (+C)
Cold drawing to achieve exact h9/h10 diameter tolerances and smooth bright surface finish.
Stress Relieving
Thermal strain-relief treatment to prevent bar bowing and distortion during asymmetric machining.
ETG 88 Industry Applications
ETG 88 Free Cutting Steel is widely used across high-tensile shafts, hydraulic fittings, automotive pins, and precision drive gears.
Automotive Transmission Shafts
High-torque transmission shafts, splined shafts, drive pinions, & steering components.
Hydraulic Hose Fittings & Valves
High-pressure hydraulic connectors, valve bodies, piston rods, & manifold blocks.
Textile & Printing Machinery
Precision spindle shafts, roller pins, gear shafts, & high-speed drive spindles.
High-Tensile Turned Fasteners
Heavy-duty studs, special anchor bolts, tie rods, & high-strength fasteners.
Availability and Customization
At STEEL MART, we supply ETG 88 Free Cutting Steels in standard bar profiles and custom lengths.
| 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 88 Free Cutting Steel is an outstanding high-strength mechanical steel engineered to deliver 880–980 MPa tensile strength, 680–750 MPa yield strength, and 90% machinability rating without secondary quench-and-temper heat treatment. Supplied by STEEL MART with strict quality assurance and full EN 10204 3.1 Mill Test Certification, ETG 88 is the ideal choice for high-tensile turned components demanding distortion-free machining.
Frequently Asked Questions
ETG 88 delivers 880–980 MPa tensile strength and 680–750 MPa yield strength directly in cold drawn as-received condition.
No, ETG 88 achieves its high mechanical strength directly during manufacturing, eliminating heat treatment and warpage.