ASTM A572 Carbon Steel Fasteners are high-strength low-alloy steel fastening components manufactured from A572-grade structural steel where high yield strength, reliable load-bearing performance, and structural integrity are required. Commonly supplied as A572 Fasteners, ASTM A572 Bolts and Nuts, threaded rods, structural washers, and custom fastening components, they are suitable for demanding structural and industrial applications.
ASTM A572/A572M covers HSLA columbium-vanadium structural steel in Grades 42, 50, 55, 60, and 65, with increasing strength levels across the grades. The specification covers structural shapes, plates, sheet piling and bars intended for bolted, welded and riveted construction.
We supply A572 Carbon Steel Fasteners in different sizes, thread configurations, finishes and custom dimensions according to project requirements. Material test certificates, dimensional inspection and additional testing can also be provided when specified.
What Are ASTM A572 Carbon Steel Fasteners?
ASTM A572 Carbon Steel Fasteners are fastening components produced using high-strength low-alloy A572 steel grades. The material is strengthened through controlled alloying with elements such as columbium/niobium, vanadium and, depending on the applicable type, titanium and nitrogen.
Unlike conventional carbon steel fasteners, High Low Alloy A572 Fasteners can provide higher yield strength while maintaining useful ductility. This makes them suitable for structural connections where strength-to-weight performance is important.
Typical products include:
- ASTM A572 Grade 50 Bolts
- ASTM A572 Grade 50 Anchor Bolts
- ASTM A572 Grade 42 Fasteners
- ASTM A572 Grade 55 Bolts
- ASTM A572 Grade 60 Fasteners
- ASTM A572 Grade 65 Fasteners
- A572 Carbon Steel Threaded Rod / Threaded Bar
- Structural plate washers
- Square washers
- Custom structural bolts and fastening components
ASTM A572 fasteners are high-strength structural fastening components made from A572 HSLA steel. A572/A572M covers Grades 42, 50, 55, 60 and 65, with minimum yield strengths from 42 ksi (290 MPa) to 65 ksi (450 MPa).
Table of Contents
- ➤ What Are ASTM A572 Carbon Steel Fasteners?
- ➤ Types of A572 Carbon Steel Fasteners
- ➤ ASTM A572 Fasteners Specifications
- ➤ ASTM A572 Mechanical Properties
- ➤ ASTM A572 Chemical Composition
- ➤ ASTM A572 Equivalent Grades
- ➤ A572 Fastener Weight Chart
- ➤ Applications of ASTM A572 Fasteners
- ➤ Why Choose Us for ASTM A572 Fasteners?
- ➤ Order ASTM A572 Carbon Steel Fasteners
Types of A572 Carbon Steel Fasteners
We manufacture and supply different A572 Fasteners based on application, dimensions and project specifications.
➤ A572 Bolts and Nuts
ASTM A572 Bolts and Nuts are used for structural connections in fabricated steelwork, infrastructure and heavy engineering. Hex bolts, heavy hex structural bolts and custom bolt configurations can be supplied according to the required dimensional standard.
➤ A572 Grade 50 Bolts
A572 Gr 50 Bolts are among the most commonly specified A572-grade products because Grade 50 provides a minimum yield strength of 50 ksi (345 MPa) and minimum tensile strength of 65 ksi (450 MPa).
➤ A572 Grade 50 Anchor Bolts
A572 Grade 50 Anchor Bolts are used to secure structural steelwork, equipment supports, base plates and other assemblies to concrete foundations or structural members.
➤ ASTM A572 Grade 42 Fasteners
Grade 42 provides a minimum yield strength of 42 ksi (290 MPa) and is intended for bolted, welded or riveted structural applications under the A572 specification.
➤ A572 Grade 55, 60 and 65 Fasteners
A572 Grade 55 Bolts, ASTM A572 Grade 60 Fasteners, and A572 Grade 65 Fasteners are selected when progressively higher minimum yield strengths are required. Grade 65 provides the highest minimum yield strength among the five A572 grades covered by the specification.
➤ A572 Threaded Rod / Threaded Bar
A572 Carbon Steel Threaded Rod / Threaded Bar can be manufactured in full-thread or specified-thread configurations for structural assemblies, supports, anchoring systems and custom fabrication.
➤ A572 Structural Plate Washers & Square Washers
A572 Structural Plate Washers & Square Washers provide a larger bearing surface for structural connections and anchoring applications. Dimensions and thicknesses can be customized according to engineering requirements.
➤ Zinc Plated A572 Carbon Steel Bolts
Zinc Plated A572 Carbon Steel Bolts can be supplied where additional protection against atmospheric corrosion is required. The coating method and thickness should be selected according to the service environment and applicable project specification.
ASTM A572 Fasteners Specifications
| Property | ASTM A572 Fasteners |
|---|---|
| Material | High-Strength Low-Alloy Steel |
| Standard | ASTM A572/A572M |
| Grades | 42, 50, 55, 60, 65 |
| Product Forms Covered by A572 | Shapes, plates, sheet piling and bars |
| Fastener Forms | Bolts, anchor bolts, threaded bars, washers, custom components |
| Thread Type | UNC / UNF / Metric / Custom |
| Dimensions | As per applicable dimensional standard or drawing |
| Surface Finish | Plain, zinc plated, hot-dip galvanized, custom |
| Manufacturing | Forged, machined or custom manufactured |
| Inspection | Dimensional, visual, mechanical and material testing as required |
| Certification | Material Test Certificate available |
| Application | Structural and heavy engineering connections |
ASTM A572 Mechanical Properties
| Grade | Yield Strength, Min. | Tensile Strength, Min. | Elongation in 8 in. | Elongation in 2 in. |
|---|---|---|---|---|
| A572 Grade 42 | 42 ksi / 290 MPa | 60 ksi / 415 MPa | 20% | 24% |
| A572 Grade 50 | 50 ksi / 345 MPa | 65 ksi / 450 MPa | 18% | 21% |
| A572 Grade 55 | 55 ksi / 380 MPa | 70 ksi / 485 MPa | 17% | 20% |
| A572 Grade 60 | 60 ksi / 415 MPa | 75 ksi / 520 MPa | 16% | 18% |
| A572 Grade 65 | 65 ksi / 450 MPa | 80 ksi / 550 MPa | 15% | 17% |
ASTM A572 Chemical Composition
| Grade | Carbon, Max. % | Manganese, Max. %* | Phosphorus, Max. % | Sulfur, Max. % | Silicon, Max./Range % |
|---|---|---|---|---|---|
| A572 Gr 42 | 0.21 | 1.35 | 0.040 | 0.050 | 0.40 / 0.15–0.40 |
| A572 Gr 50 | 0.23 | 1.35 | 0.040 | 0.050 | 0.40 / 0.15–0.40 |
| A572 Gr 55 | 0.25 | 1.35 | 0.040 | 0.050 | 0.40 / 0.15–0.40 |
| A572 Gr 60 | 0.26 | 1.35 | 0.040 | 0.050 | Type-dependent |
| A572 Gr 65 | 0.23–0.26** | 1.35–1.65** | 0.040 | 0.050 | Type-dependent |
ASTM A572 Equivalent Grades
| Standard | Approximate Grade / Comparison |
|---|---|
| ASTM A572 | Grade 42 |
| ASTM A572 | Grade 50 |
| ASTM A572 | Grade 55 |
| ASTM A572 | Grade 60 |
| ASTM A572 | Grade 65 |
| EN 10025 | Comparable HSLA structural grades may be considered based on strength and chemistry |
| JIS | Comparable structural grades may be considered based on engineering requirements |
| GB/T | Comparable high-strength structural grades may be considered after technical verification |
A572 Fastener Weight Chart
| Nominal Diameter | Approx. Weight kg/m |
|---|---|
| M6 | 0.22 |
| M8 | 0.39 |
| M10 | 0.62 |
| M12 | 0.89 |
| M14 | 1.21 |
| M16 | 1.58 |
| M18 | 2.00 |
| M20 | 2.47 |
| M22 | 3.00 |
| M24 | 3.55 |
| M27 | 4.49 |
| M30 | 5.55 |
| M33 | 6.71 |
| M36 | 7.99 |
| M39 | 9.38 |
| M42 | 10.88 |
| M45 | 12.49 |
| M48 | 14.21 |
Applications of ASTM A572 Fasteners
HSLA ASTM A572 Fasteners are used where structural strength and dependable fastening are important.
Typical applications include:
- Structural steel fabrication
- Bridges and infrastructure
- Building frames
- Steel towers
- Heavy equipment
- Industrial structures
- Support structures
- Base plates and foundation anchoring
- Machinery assemblies
- Transportation infrastructure
- Energy and engineering projects
A572/A572M specifically identifies applications involving bolted, welded and riveted structures, including bridges and buildings.
Why Choose Us for ASTM A572 Fasteners?
We supply ASTM A572 Fasteners according to project requirements, drawings and applicable material specifications. Our focus is on consistent material identification, dimensional accuracy and reliable documentation.
Key advantages include:- A572 Grades 42, 50, 55, 60 and 65
- Custom bolt and threaded-bar dimensions
- Structural washers and square washers
- Plain and coated finishes
- Custom sizes available
- Material Test Certificates
- Dimensional inspection
- PMI/testing where specified
- Export-quality packaging
- Bulk and project-based supply
- Global export support
As an ASTM A572 Fasteners Exporter and A572 Carbon Steel Fastener Stockist, we can support both standard requirements and customized structural fastening orders.
Order ASTM A572 Carbon Steel Fasteners
Looking for ASTM A572 Carbon Steel Fasteners, A572 Gr 50 Bolts, A572 Grade 50 Anchor Bolts, A572 Carbon Steel Threaded Rod / Threaded Bar, or structural washers?
Share your required grade, diameter, length, thread specification, quantity, finish and applicable standard. We can review the requirement and provide the appropriate material documentation and commercial quotation.
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