Thabiso Steel is a reputable manufacturer and supplier located in Cape Town, South Africa, specializing in top-notch fastening solutions, particularly Alloy Steel Gr B7 Fasteners. With a strong dedication to quality and precision engineering, Thabiso Steel provides durable, corrosion-resistant fasteners designed to meet the needs of various industries. The company follows international standards and guarantees timely delivery both locally and globally. Renowned for its customer-centric approach, Thabiso Steel has become the go-to choice for clients looking for dependable Alloy Steel Gr B7 Fasteners in sectors like construction, oil & gas, petrochemical, and heavy machinery.
Alloy Steel Gr B7 Fasteners are crafted from AISI 4140/4142 chromium-molybdenum steel, featuring a well-balanced mix of carbon (0.37–0.49%), manganese (0.65–1.10%), phosphorus (≤0.035%), sulfur (≤0.040%), chromium (0.75–1.20%), and molybdenum (0.15–0.25%). These fasteners undergo heat treatment to boost their strength, achieving a minimum tensile strength of 125 ksi and a yield strength of 105 ksi. They showcase impressive hardness (Rockwell C35 max), toughness, and wear resistance, making them perfect for high-stress environments. Their mechanical properties guarantee reliable performance even under extreme pressure and temperature conditions.
Specification :Â ASTM A193 / ASME SA193
Dimension :Â DIN, ISO, ASTM, JIS, BS, GB, IS and all International Standards
Size Range :Â M3 – M56 | 3/6″ to 2″ | Custom Sizes
Length :Â 3 mm to 200 mm
| Alloy Steel B7 | C | Mn | Si | P | S | Mo | Cr |
| 0.08-0.15 | 1.00 max | 1.00 max | 0.040 | 0.030 | 0.15-0.25 | 11.50-13.50 |
| Grade | Diameter | Tensile Strength | Yield Strength | Elongation | Reduction | Hardness |
| Grade B7 | M64 and under | 860 | 720 | 16 | 50 | 321 HBW or 35 HRC |
| Over M64 to M100 | 795 | 655 | 16 | 50 | 321 HBW or 35 HRC | |
| Over M100 to M180 | 690 | 515 | 18 | 50 | 321 HBW or 35 HRC |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
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Hexagon Bolts / Set Screws |
Stud Bolts |
Hexagon Nuts |
Socket Capscrews |
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DIN 931 |
BS4882 |
DIN 934 |
DIN 912 |
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DIN 933 |
DIN 976 |
BS 1768 |
DIN 6912 |
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BS 1768 |
BS 1769 |
DIN 7984 |
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UNI 5731 |
BS 1083 |
ANSI B18.3 |
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UNI 5739 |
BS 3692 |
ISO 4762 |
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ISO 4014 |
ISO 4032 |
UNI 5931 |
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ISO 4017 |
ISO 4033 |
BS 2470 |
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BS 1769 |
ANSI B18.2.2 |
BS 4168 |
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BS 3692 |
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ANSI B18.2.1 |
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Socket & Slotted Set Screws |
Socket & Slotted Countersunk Screws |
Studs |
Washers |
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DIN 913 |
DIN 963 |
DIN 938 |
DIN 125 |
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DIN 914 |
DIN 7991 |
DIN 939 |
DIN 9021 |
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DIN 915 |
BS 4168 |
DIN 2510 |
BS 4320 |
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DIN 916 |
BS 1981 |
BS 4439 |
BS 3410 |
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DIN 551 |
BS 483 |
BS 2693 |
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DIN 553 |
BS 2470 |
Spring Washers |
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DIN 438 |
DIN 127 |
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BS 4168 |
BS 4464 |
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BS 1802 |
Alloy Steel Gr B7 Fasteners are commonly utilized in high-pressure and high-temperature applications across a variety of industries. You’ll often find them in oil and gas refineries, power plants, chemical processing facilities, and heavy machinery manufacturing, where they excel at securing flanged joints, valves, pumps, and pressure vessels. Their remarkable strength and corrosion resistance make them ideal for challenging environments, including subsea and offshore installations. In construction and infrastructure projects, B7 fasteners play a crucial role in providing structural integrity for steel frameworks and bridges. Thabiso Steel ensures that these fasteners meet stringent quality standards, so they perform reliably in mission-critical applications.
ThabisoSteel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Cape Town, South Africa.
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