1,We Manufacturing processes are primarily classified into four types:
1:Forging,
2:Casting,
3:Cutting,
4:Rolling.
2,We can manufacture in accordance with these standards.
Standards:
GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards).
Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others.
The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160.
The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500.
Flange Classification
1. **According to Chemical Industry Standards:** Flanges are classified as follows:
Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)).
2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows:
Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation).
3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows:
Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange.
4. **According to Connection Method/Type:** Flanges are classified as follows:
Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc.
5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges.
6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges.
A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts."
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AK Steel Flange ASTM A 1011, Grade 30 Hot Rolled Carbon Steel Flange, Structural Steel Flange (SS) Product Information
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AK Steel Flange ASTM A 1011, Grade 30 Hot Rolled Carbon Steel Flange, Structural Steel Flange (SS) Synonyms
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AK Steel ASTM A 1011, Grade 30 Hot Rolled Carbon Steel, Structural Steel (SS) Product Information
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**Product Name:** AK Steel ASTM A1011, Grade 30 Hot-Rolled Carbon Steel, Structural Steel (SS)
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### **1. Overview**
AK Steel's ASTM A1011 Grade 30 is a general-purpose, hot-rolled low-carbon structural steel sheet and strip. It offers a fundamental combination of modest strength, good formability, and weldability at an economical cost. As one of the most commonly specified hot-rolled grades, it is a versatile workhorse material for a wide range of structural and fabrication applications where high strength is not the primary requirement. The "Grade 30" designation indicates a minimum yield strength of 30 ksi.
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### **2. International Standards**
This product conforms primarily to the following widely recognized North American standard:
* **ASTM A1011 / A1011M:** Standard Specification for Steel, Sheet and Strip, Hot-Rolled, Carbon, Structural, High-Strength Low-Alloy and High-Strength Low-Alloy with Improved Formability.
* This product falls under the **Commercial Steel (CS)** Type A or B and meets the requirements for **Grade 30**.
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### **3. Chemical Composition (Typical, % by Weight)**
Grade 30 is a non-alloy carbon steel with a simple, cost-effective composition. Chemistry is typically reported as a maximum unless noted as a range.
| Element | Content (Maximum, unless specified) | Note |
| :--- | :--- | :--- |
| **Carbon (C)** | 0.08% - 0.20% (Typical range for CS) | Provides base strength. Lower end promotes better weldability and formability. |
| **Manganese (Mn)** | 0.60% - 0.90% | Strengthens and aids hot-rolling. |
| **Phosphorus (P)** | 0.035% max | Residual element, kept low for ductility and weldability. |
| **Sulfur (S)** | 0.035% max | Residual element, kept low to minimize hot shortness and improve weldability. |
| **Silicon (Si)** | 0.10% - 0.30% | Used as a deoxidizer (killed or semi-killed steel). |
| **Copper (Cu)** | 0.20% min (when required) | Optional for atmospheric corrosion resistance (when specified per ASTM A1011). |
**Note:** The specific chemistry can vary based on the melting practice (e.g., fully killed vs. semi-killed) and the specific **Type (CS Type A or B)** ordered, which governs permissible chemistry ranges and deoxidation practices.
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### **4. Physical & Mechanical Properties**
Properties are specified for the as-rolled condition (unless annealed). The steel exhibits an isotropic microstructure (no directional grain refinement).
| Property | Minimum Requirement (ASTM A1011) | Typical Value / Description |
| :--- | :--- | :--- |
| **Yield Strength (min)** | 30 ksi (205 MPa) | |
| **Tensile Strength** | 49 ksi min (340 MPa) | Typically ranges from 49 - 65 ksi (340 - 450 MPa). |
| **Elongation in 2" (min)** | 23% (for thickness ≥ 0.23 in.) | Good ductility for bending and moderate forming. |
| **Modulus of Elasticity** | 29,000 ksi (200 GPa) | Standard for carbon steel. |
| **Density** | 0.284 lb/in³ (7.85 g/cm³) | |
| **Poisson's Ratio** | 0.29 | |
| **Surface Finish** | Standard hot-rolled mill finish with visible scale. | Surface scale must be removed (e.g., by pickling or abrasive blasting) prior to painting or welding for critical applications. |
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### **5. Key Features & Advantages**
* **Cost-Effective:** One of the most economical hot-rolled steel grades available.
* **Good Formability & Weldability:** The low carbon content allows for easy bending, rolling, and welding using all common methods (SMAW, GMAW, GTAW, SAW).
* **Excellent Machinability:** Readily machinable in the as-rolled condition.
* **Wide Availability:** Readily available in a vast range of thicknesses, widths, and coil weights.
* **Versatile Base Material:** Serves as an excellent substrate for further processing like galvanizing, painting, or fabrication.
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### **6. Product Applications**
ASTM A1011 Grade 30 is ubiquitous in general manufacturing, construction, and industrial sectors.
* **Structural Framing:** Base plates, brackets, gussets, and light structural members in buildings and equipment.
* **General Fabrication:** Truck frames, trailer components, agricultural equipment chassis, machinery guards, and frames.
* **Storage & Material Handling:** Shelving units, pallet racks (non-load-critical components), dump truck beds, and hoppers.
* **Pipe & Tube Manufacturing:** Used as a starting material for the production of welded pipe and structural tubing.
* **Base Metal for Further Processing:** A prime candidate for subsequent hot-dip galvanizing (ASTM A653) or pickling and oiling (P&O) for improved surface finish.
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### **7. Fabrication Notes**
* **Surface Scale:** The hot-rolled mill scale must be removed prior to most finishing operations. Methods include pickling, abrasive blasting, or grinding.
* **Forming:** Performs well in cold bending and roll-forming operations. A bend radius equal to the material thickness is typically achievable.
* **Welding:** Highly weldable. No preheat is required for most thicknesses. Standard filler metals (e.g., E70S-6 for GMAW) are suitable.
* **Machining:** Produces discontinuous chips. Tool life and surface finish are good with proper speeds and feeds.
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**Disclaimer:**
The information provided is a general guide. **AK Steel** is now part of **Cleveland-Cliffs Inc.** For critical design and fabrication, always consult the latest official **ASTM A1011** standard specification and the relevant Material Test Report (MTR) or Technical Data Sheet (TDS) from the producer for the exact chemistry, mechanical properties, and recommended processing guidelines for your specific order.
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AK Steel ASTM A 1011, Grade 30 Hot Rolled Carbon Steel, Structural Steel (SS) Specification
Dimensions
Size：
Diameter 20-1000 mm Length <4581 mm
Size:We can customized as required
Standard：
Per your request or drawing
We can customized as required
Properties（Theoretical）
Chemical Composition
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AK Steel ASTM A 1011, Grade 30 Hot Rolled Carbon Steel, Structural Steel (SS) Properties
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Applications of AK Steel Flange ASTM A 1011, Grade 30 Hot Rolled Carbon Steel Flange, Structural Steel Flange (SS)
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Chemical Identifiers AK Steel Flange ASTM A 1011, Grade 30 Hot Rolled Carbon Steel Flange, Structural Steel Flange (SS)
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Packing of AK Steel Flange ASTM A 1011, Grade 30 Hot Rolled Carbon Steel Flange, Structural Steel Flange (SS)
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Standard Packing:
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Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Flange drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1052 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition
