Alloy Steel Gr 2 fasteners are robust components designed for tough industrial tasks that demand superior mechanical performance along with heat and pressure resistance. Made from alloy steels and generally adhering to ASTM A194 Grade 2 standards, these fasteners find their place in industries like oil & gas, power generation, petrochemicals, and heavy machinery. The “Grade 2” label indicates that these fasteners undergo special heat treatment to achieve the best possible hardness and toughness. You can find them in various forms such as bolts, nuts, studs, and washers, all crafted to ensure secure and reliable fastening even in the most extreme conditions.
When it comes to their chemical makeup, Alloy Steel Gr 2 fasteners typically contain medium carbon levels (around 0.40–0.50%) along with alloying elements like manganese, silicon, and small amounts of sulfur and phosphorus. This careful balance is what gives them their impressive mechanical properties. After undergoing heat treatment (quenching and tempering), these fasteners usually reach a minimum tensile strength of 110 ksi (758 MPa) and a yield strength of 80 ksi (552 MPa), along with commendable hardness and impact resistance. Their metallurgical structure guarantees they maintain their integrity under thermal stress, making them suitable for both high-temperature and cryogenic applications, depending on what’s needed.
Specification :Â ASTM A 193 ASME SA 193
Standard :Â DIN, ASTM, BS and all International Standards
Length :Â 3 mm to 2 mm
Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Types :Â Nuts, Bolts, Screws, Sockets, Studs, Screw, Hex Set Screw, Socket Screw, Cap Screw, Pan Head Screw, Socket Head Cap Screw, Washers, Spring Washers, Studs, Anchors
| Alloy Steel 2 | C | Mn | P | S | Si | Ni | Cr |
| 0.40% min | 1.00% max | 0.040% | 0.050% | 0.40% max | – | – |
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
|---|---|---|---|---|---|
| 2 | Up to 2-1/2 | 125 | 105 | 16 | 50 |
| 2-5/8 – 4 | 115 | 95 | 16 | 50 | |
| 4-1/8 – 7 | 100 | 75 | 18 | 50 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Hexagon Bolts / Set Screws | Stud Bolts | Hexagon Nuts | Socket Capscrews |
|---|---|---|---|
DIN 931 | BS4882 | DIN 934 | DIN 912 |
DIN 933 | DIN 976 | BS 1768 | DIN 6912 |
BS 1768 | Â | BS 1769 | DIN 7984 |
UNI 5731 | Â | BS 1083 | ANSI B18.3 |
UNI 5739 | Â | BS 3692 | ISO 4762 |
ISO 4014 | Â | ISO 4032 | UNI 5931 |
ISO 4017 | Â | ISO 4033 | BS 2470 |
BS 1769 | Â | ANSI B18.2.2 | BS 4168 |
BS 3692 | Â | Â | Â |
ANSI B18.2.1 | Â | Â | Â |
Socket & Slotted Set Screws | Socket & Slotted Countersunk Screws | Studs | Washers |
DIN 913 | DIN 963 | DIN 938 | DIN 125 |
DIN 914 | DIN 7991 | DIN 939 | DIN 9021 |
DIN 915 | BS 4168 | DIN 2510 | BS 4320 |
DIN 916 | BS 1981 | BS 4439 | BS 3410 |
DIN 551 | BS 483 | BS 2693 | Â |
DIN 553 | BS 2470 | Â | Spring Washers |
DIN 438 | Â | Â | DIN 127 |
BS 4168 | Â | Â | BS 4464 |
 |  |  | BS 1802 |
You’ll find Alloy Steel Gr 2 fasteners in pressure vessels, pipeline flanges, heat exchangers, and other high-stress assemblies across energy and process industries. They excel in environments where thermal cycling, vibration, or corrosive conditions are a factor. In construction and heavy equipment manufacturing, these fasteners deliver reliable performance for structural joints and load-bearing assemblies. Their dependability is key in ensuring that everything holds together, even under the toughest conditions.
Filiz Steel 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 Istanbul, Turkey.
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