DIN976 ASTM A193 B7 Alloy Steel Black Oxide Threaded Rod with Double Chamfer
DIN976 ASTM A193 B7 alloy steel black oxide threaded rod with double chamfer is a high-strength fastening component designed for heavy-duty bolted connections, flange assemblies, pressure systems, and industrial structural applications. The DIN976 ASTM A193 B7 alloy steel black oxide threaded rod with double chamfer is manufactured from heat-treated alloy steel, providing excellent tensile strength, stable thread engagement, and reliable performance under high load.
The DIN976 ASTM A193 B7 alloy steel black oxide threaded rod with double chamfer features full-length threading and chamfered ends on both sides. This design improves nut installation, reduces thread damage, and supports efficient assembly in petrochemical, machinery, construction, and OEM applications.
Product Overview
The DIN976 ASTM A193 B7 alloy steel black oxide threaded rod with double chamfer is engineered for applications requiring strong clamping force and high mechanical stability. ASTM A193 B7 material is commonly used in high-temperature and high-pressure bolting systems, especially in pipeline flanges, valves, pressure vessels, and industrial equipment.
This product follows DIN976 dimensional requirements for metric threaded rods. The black oxide finish provides a clean industrial appearance and basic surface protection. Meanwhile, the double chamfer design allows smoother nut engagement from both ends.
As a reliable industrial fastener, the DIN976 ASTM A193 B7 alloy steel black oxide threaded rod with double chamfer is suitable for EPC projects, OEM fasteners, maintenance operations, and heavy industrial assemblies.
Product Specifications
| Item | Description |
|---|---|
| Standard | DIN976 / ASTM A193 B7 |
| Product Name | DIN976 ASTM A193 B7 Alloy Steel Black Oxide Threaded Rod with Double Chamfer |
| Material | Alloy Steel ASTM A193 B7 |
| Thread Type | Metric Full Thread |
| Head Type | Headless Threaded Rod |
| Drive Type | Not Applicable |
| Diameter Range | M6–M64 |
| Length Range | 100mm–3000mm or customized |
| Surface Finish | Black Oxide |
| Strength Grade | ASTM A193 B7 |
| Thread Direction | Right Hand / Custom |
| Packaging | Bundle, carton, wooden case, pallet |
| Customization | Diameter, length, thread pitch, coating, chamfer, marking |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | ≥ 860 MPa typical for A193 B7 |
| Yield Strength | ≥ 720 MPa typical for A193 B7 |
| Hardness | Approx. HRC 25–35 |
| Density | 7.85 g/cm³ |
| Corrosion Resistance | Moderate with black oxide; higher protection available with coating |
| Operating Temperature | Suitable for high-temperature bolting service |
| Thread Tolerance | 6g or customized |
| Manufacturing Standard | DIN976 / ASTM A193 B7 / Project specification |
Materials and Manufacturing Process
The DIN976 ASTM A193 B7 alloy steel black oxide threaded rod with double chamfer is produced through a controlled process focused on strength, thread accuracy, and stable batch quality.
Production starts with premium chromium-molybdenum alloy steel bar. Raw material is checked for chemical composition and mechanical suitability. The bar is then cut to required length with tight tolerance control. For standard sizes, thread rolling improves thread strength and fatigue resistance. For large diameters or special projects, CNC machining can be used to achieve precise thread geometry.
Heat treatment is a key step for ASTM A193 B7 performance. Quenching and tempering improve tensile strength, yield strength, and toughness. After heat treatment, straightness correction ensures accurate installation. Both ends are chamfered to reduce burrs and make nut assembly easier.
Surface finishing includes black oxide treatment, cleaning, oiling, and anti-rust protection. Finally, inspection checks thread gauges, hardness, tensile properties, surface condition, length, diameter, chamfer quality, and packaging.
Each DIN976 ASTM A193 B7 alloy steel black oxide threaded rod with double chamfer is manufactured for consistent industrial performance.
Applications of the Product
This threaded rod is widely used across high-load industrial environments.
Typical applications include petrochemical pipeline flanges, pressure vessels, valves, pumps, heat exchangers, power generation equipment, construction steel structures, heavy machinery foundations, industrial equipment frames, manufacturing systems, renewable energy structures, and EPC project installations.
In flange connections, the full thread provides flexible engagement length. In machinery and construction systems, the high-strength alloy steel structure provides reliable clamping force and resistance to mechanical stress. Therefore, it is well suited for demanding assemblies where ordinary carbon steel threaded rods may not provide enough strength.
Why Choose This Product
This product offers high mechanical strength, excellent thread accuracy, and dependable performance for heavy-duty fastening systems. ASTM A193 B7 alloy steel provides strong load-bearing capability. DIN976 full-thread geometry improves installation flexibility.
The black oxide finish gives a professional surface appearance. The double chamfer design reduces installation friction and helps protect mating nuts. In addition, the product supports bulk supply, custom length, OEM/ODM production, fast delivery, and project-based packaging.
Why Choose Flybear
Flybear supplies industrial fasteners for global buyers, EPC contractors, OEM manufacturers, distributors, and engineering projects.
Flybear provides strong manufacturing capability, stable inventory support, custom production, engineering support, global supply ability, and technical consultation. We can manufacture threaded rods according to drawings, project specifications, material grades, coating requirements, and packaging standards.
Quality Inspection and Control
Quality control covers every stage of production. Inspection includes chemical composition analysis, tensile testing, yield strength testing, hardness testing, thread gauge inspection, dimensional inspection, straightness inspection, chamfer inspection, surface inspection, salt spray test when required, and packaging inspection.
Production follows ISO quality system compliance to ensure stable quality, traceability, and reliable performance for industrial applications.
Selection Guide
When selecting DIN976 ASTM A193 B7 alloy steel black oxide threaded rods, consider material grade, diameter, length, thread pitch, load requirements, temperature, indoor or outdoor use, corrosion level, and nut compatibility.
For corrosive outdoor environments, black oxide may need additional oiling or alternative coatings. For pressure systems, confirm the matching nut grade, washer type, torque requirement, and project standard before ordering.
FAQ
What is DIN976?
DIN976 is a standard for threaded rods with continuous external metric threads.
What is ASTM A193 B7 material?
ASTM A193 B7 is a heat-treated alloy steel grade commonly used for high-strength and high-temperature bolting.
Why use double chamfered ends?
Double chamfers make nut installation smoother and help reduce thread damage at both ends.
Is black oxide corrosion resistant?
Black oxide provides basic surface protection. For stronger corrosion resistance, additional coating options can be selected.
How to request quotation?
Send diameter, length, thread pitch, material grade, coating, quantity, and any drawing requirements for quotation.
The DIN976 ASTM A193 B7 alloy steel black oxide threaded rod with double chamfer provides high strength, precise threading, and dependable performance for industrial fastening systems. For quotation, customization, and technical support, please Contact Us.
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