Alloy Steel 4140 Fasteners
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Thabiso Steel, located in Cape Town, South Africa, has earned a solid reputation as a reliable manufacturer and supplier of high-performance steel products tailored for demanding industrial applications. Among their impressive lineup, the Alloy Steel 4140 Fasteners truly shine with their remarkable strength, toughness, and precision engineering. Crafted using cutting-edge machining and heat treatment methods, these fasteners meet international standards for performance and reliability. Thabiso Steel’s commitment to quality, innovation, and customer satisfaction guarantees that every product consistently delivers dependable results across a variety of industries.
Leading Manufacturer & Supplier of high-class ASTM A193 Alloy Steel AISI 4140 Fastener South Africa, ASTM A194 AS AISI-SAE 4140 Fasteners in United kingdom, Alloy Steel AISI 4140 Bolts Cape Town, AISI 4140 Nuts Johannesburg, ASTM A320 AISI 4140 Screws Gqeberha, UNS G41400 Alloy Steel Stud Bolts Fasteners Mbombela, AISI 4140 Washers Germiston, SAE 4140 Threaded Rod Exporter & Stockists Cape Town, South Africa.
Alloy Steel 4140 Fasteners
Alloy Steel 4140 Hex Bolt
Alloy Steel Stud 4140 Bolt
Table of Contents
DIN 1.7225 Alloy Steel Fasteners South Africa, Grade 4140 AISI Shoulder Nuts United kingdom, AISI 4140 Nut Cape Town, 4140 AISI Bolt Johannesburg, AISI 4140 Bolt Nuts Gqeberha, AISI 4140 Screw & Nuts Suppliers and Exporters in Mbombela, AISI 4140 Washers Germiston, SAE 4140 Threaded Rod Exporter & Stockists Cape Town, South Africa.
What is Alloy Steel 4140 Fasteners?
The Alloy Steel 4140 Fasteners are primarily made up of chromium, molybdenum, and carbon, creating a versatile low-alloy steel known for its outstanding mechanical properties. The addition of chromium boosts hardness and corrosion resistance, while molybdenum enhances strength and toughness. These fasteners showcase high tensile and yield strength, excellent fatigue resistance, and superior wear performance. Thanks to the heat-treated microstructure of the alloy, they offer dimensional stability and durability under stress, making them perfect for applications that involve heavy loads, impact, and fluctuating temperatures.
Alloy Steel 4140 Fasteners Specification
| Standard | ASTM A193, ASTM A194 / ASME SA193, SA194 GR, IS, BS |
| Specification | IS, BS, ASTM |
| Size | M 02 to M 160 |
| Length | UPTO 5 METERS |
| Grade | B 6, B 7/ B 7M, B 16, 2, 2HM, 2H, GR 6, B 7, B 7M |
| Type | Bolts, nuts, Washers, Anchor Fasteners, Stud Bolts, Eye Bolt, Stud, Threaded Rod, Cotter Pin, Socket Screw, Fine Fasteners & Spares, Foundation Fasteners, etc. |
Alloy Steel 4140 Fasteners Chemical Composition
| Element | AISI 4140 |
| Fe | 96.785 – 97.77 |
| Cr | 0.80 – 1.10 |
| Mn | 0.75 – 1.0 |
| C | 0.380 – 0.430 |
| Si | 0.15 – 0.30 |
| Mo | 0.15 – 0.25 |
| S | 0.040 |
| P | 0.035 |
Alloy Steel 4140 Fasteners Mechanical Properties
| Grade AISI 4140 | Metric | Imperial |
| Tensile strength | 655 MPa | 95000 psi |
| Yield strength | 415 MPa | 60200 psi |
| Bulk modulus (Typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 25.70% | 25.70% |
| Hardness, Brinell | 197 | 197 |
| Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
| Hardness, Rockwell B (converted from Brinell hardness) | 92 | 92 |
| Hardness, Rockwell C (Converted from Brinell hardness, value below normal HRC range, for comparison purposes only.) | 13 | 13 |
| Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
| Machinability (Annealed and cold drawn. Based on 100% machinability for AISI 1212 steel.) | 65 | 65 |
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Top Manufacturer and Supplier of Alloy Steel 4140 Fasteners in Cape Town, South Africa
Alloy Steel 4140 Fasteners is a trusted manufacturer and supplier of high-quality Alloy Steel 4140 Fasteners in Cape Town, South Africa. We specialize in premium steel products, with a focus on Alloy Steel 4140, known for its superior strength, toughness, and excellent resistance to wear and corrosion. Our extensive inventory includes Bolts, Nuts, Washers, Screws, Studs, and other fasteners designed to meet a wide range of industrial applications. Committed to fast delivery and exceptional customer service, we use only the finest raw materials to ensure superior performance and reliability. Contact us today for all your Alloy Steel 4140 Fastener needs!
AISI 4140 Alloy Steel Fasteners Thermal Properties
| Grade AISI 4140 | Metric | Imperial |
| Thermal expansion co-efficient (@ 0-100°C/32-212°F) | 12.2 µm/m°C | 6.78 µin/in°F |
| Thermal conductivity (100°C) | 42.6 W/mK | 296 BTU in/hr.ft².°F |
Leading Manufacturer & Supplier of high-class ASTM A193 Alloy Steel AISI 4140 Fastener South Africa, ASTM A194 AS AISI-SAE 4140 Fasteners in United kingdom, Alloy Steel AISI 4140 Bolts Cape Town, AISI 4140 Nuts Johannesburg, ASTM A320 AISI 4140 Screws Gqeberha, UNS G41400 Alloy Steel Stud Bolts Fasteners Mbombela, AISI 4140 Washers Germiston, SAE 4140 Threaded Rod Exporter & Stockists Cape Town, South Africa.
Types of Alloy Steel 4140 Fasteners






DIN 1.7225 Alloy Steel Fasteners South Africa, Grade 4140 AISI Shoulder Nuts United kingdom, AISI 4140 Nut Cape Town, 4140 AISI Bolt Johannesburg, AISI 4140 Bolt Nuts Gqeberha, AISI 4140 Screw & Nuts Suppliers and Exporters in Mbombela, AISI 4140 Washers Germiston, SAE 4140 Threaded Rod Exporter & Stockists Cape Town, South Africa.
Uses of Alloy Steel 4140 Fasteners
You’ll find Alloy Steel 4140 Fasteners being utilized across various industries, including automotive, construction, oil and gas, petrochemical, and heavy machinery. They’re particularly well-suited for applications that demand high strength and wear resistance, such as engine components, structural assemblies, pressure vessels, and mechanical equipment. These fasteners are designed to perform reliably in environments that experience high pressure, vibration, and temperature changes. With their exceptional mechanical integrity and corrosion resistance, they’ve become the go-to choice for engineers and manufacturers looking for durable and long-lasting fastening solutions.
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