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."
-:-
For detailed product information, please contact sales.
-:
Bethlehem Steel Flange ASTM A656 Grade 50 Type 7, 3/16 to 2 in. thick, Steel Flange plate Product Information
-:-
For detailed product information, please contact sales.
-:
Bethlehem Steel Flange ASTM A656 Grade 50 Type 7, 3/16 to 2 in. thick, Steel Flange plate Synonyms
-:-
For detailed product information, please contact sales.
-:
Bethlehem Steel ASTM A656 Grade 50 Type 7, 3/16 to 2 in. thick, steel plate Product Information
-:-
For detailed product information, please contact sales.
-:
## **Product Specification: Bethlehem Steel ASTM A656 Grade 50 Type 7 Thermomechanically Controlled Processed (TMCP) Steel Plate (3/16" to 2" thick)**
### **Product Overview**
Bethlehem Steel ASTM A656 Grade 50 Type 7 is a high-strength, low-alloy (HSLA) structural steel plate produced using the **Thermomechanically Controlled Process (TMCP)**. This advanced manufacturing technique combines precisely controlled rolling with accelerated cooling to achieve a fine-grained microstructure and enhanced mechanical properties without the need for traditional heat treatment like normalizing. Grade 50 Type 7 is specifically engineered to provide an optimal balance of high strength (50 ksi minimum yield), good toughness, and **exceptional weldability**, making it a cost-effective and efficient material choice for weight-sensitive applications where fabrication ease is paramount.
### **International Standard Compliance**
* **Primary Standard:** **ASTM A656 / A656M** - Standard Specification for High-Strength Low-Alloy Structural Steel Plate Produced by Thermomechanical Controlled Processing.
* **Grade & Type Designation:** **Grade 50, Type 7**. The "Type" denotes a specific chemical composition and property set. Type 7 is renowned for its superior weldability characteristics.
* **International Equivalents (Conceptual):**
* **EN Standard:** EN 10149-2 **S355MC** or **S420MC** (Hot-rolled, thermomechanically rolled weldable fine grain steels). While strength grades differ, the TMCP production philosophy and application are similar.
* **JIS Standard:** G3136 **SPFH** series (Hot-rolled high strength steel plates for welded structure).
* **ISO Standard:** ISO 4950-3 or ISO 5951 (High yield strength weldable steels).
* **Key Differentiator:** Unlike quenched & tempered (Q&T) or normalized plates, A656 Type 7 derives its properties from the TMCP rolling process itself, offering potential cost and energy savings.
---
### **Chemical Composition (Heat Analysis, Weight %)**
The chemistry of Type 7 is meticulously designed for the TMCP process, featuring low carbon and carbon equivalent (CE) for weldability, micro-alloyed with elements like Niobium (Nb) or Vanadium (V) for grain refinement and precipitation strengthening.
| Element | ASTM A656 Gr.50 Type 7 Typical Range | Purpose & Notes |
| :--- | :--- | :--- |
| **Carbon (C)** | 0.10% max | **Very low.** The cornerstone of Type 7's excellent weldability and toughness. |
| **Manganese (Mn)** | 1.50% max | Primary solid solution strengthener. Provides strength without excessively raising the CE. |
| **Phosphorus (P)** | 0.025% max | Tightly controlled impurity for improved toughness. |
| **Sulfur (S)** | 0.010% max | **Ultra-low sulfur.** Enhances through-thickness (Z-direction) properties and weld metal soundness. |
| **Silicon (Si)** | 0.30% max | Deoxidizer, contributes to strength. |
| **Copper (Cu)** | 0.20% min (when specified) | Optional for atmospheric corrosion resistance. |
| **Vanadium (V)** | 0.10% max | Primary micro-alloying element for precipitation strengthening. |
| **Niobium (Cb/Nb)** | 0.05% max | Powerful grain refiner; inhibits recrystallization during rolling for ultra-fine grains. |
| **Titanium (Ti)** | 0.10% max | Sometimes added for grain size control and nitride formation. |
| **Aluminum (Al)** | 0.010 - 0.060% | Grain refiner (Aluminum-killed steel). |
| **Nitrogen (N)** | 0.015% max | Controlled to optimize micro-alloy precipitation. |
| **Carbon Equivalent (CE IIW)** | **Typically ≤ 0.36** | CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15. **Extremely low, a hallmark of Type 7.** |
| **Pcm (Weld Crack Parameter)** | **Typically ≤ 0.18** | Pcm = C + Si/30 + Mn/20 + Cu/20 + Ni/60 + Cr/20 + Mo/15 + V/10 + 5B. Further demonstrates superior weldability. |
**TMCP Process Note:** The plate is finish-rolled in the non-recrystallization region of austenite and then subjected to Accelerated Cooling (ACC). This results in a fine ferrite-bainite microstructure, providing high strength and toughness directly from the mill.
---
### **Physical & Mechanical Properties**
#### **1. Standard Mechanical Properties (As TMCP processed):**
* **Yield Strength (min):** 50 ksi (345 MPa)
* **Tensile Strength:** 65 - 80 ksi (450 - 550 MPa)
* **Yield-to-Tensile Ratio:** 0.75 - 0.85 (typical)
* **Elongation in 2" (min):** 22% (for thickness ≤ 3/4")
* **Elongation in 8" (min):** 20% (for thickness ≤ 3/4")
* **Reduction of Area (typical):** 50 - 65%
#### **2. Impact Properties (When Specified):**
* **Charpy V-Notch Testing:** Available as specified by purchaser.
* **Typical Test Condition:** 15 - 20 ft-lb (20 - 27 J) at 0°F (-18°C) or -20°F (-29°C).
* **Typical Performance:** Often achieves 40 - 70 ft-lb (54 - 95 J) at 0°F, demonstrating good toughness from the TMCP structure.
#### **3. Physical Constants:**
* **Density:** 0.284 lb/in³ (7.85 g/cm³)
* **Modulus of Elasticity:** 29,000 ksi (200 GPa)
* **Coefficient of Thermal Expansion:** 6.5 × 10⁻⁶/°F (11.7 × 10⁻⁶/°C)
* **Thermal Conductivity:** ~28 BTU·in/(hr·ft²·°F)
#### **4. Technological Properties:**
* **Weldability:** **Excellent.** The very low carbon and CE make it **one of the most weldable high-strength structural steels**. Minimal to no preheat is required for most thicknesses.
* **Preheat/Interpass Guidelines:**
* ≤ 1" thick: Generally not required.
* 1" to 2" thick: May benefit from a mild preheat of 50-150°F (10-66°C) under highly restrained conditions.
* **Recommended Welding Processes:** All common processes (SMAW, GMAW, FCAW, SAW). Matching or slightly under-matching filler metals can be used effectively.
* **Machinability:** Good (approx. 65% of B1112 steel).
* **Formability:** Good; minimum bend radius of approx. 2t for 90° bending.
---
### **Product Applications**
#### **1. Heavy Equipment & Machinery:**
* Excavator booms, arms, and undercarriages
* Crane boom sections and jibs
* Mining and earthmoving equipment frames
* Agricultural machinery structural components
#### **2. Transportation & Automotive:**
* Heavy-duty truck chassis and frame rails
* Trailer frames and gooseneck sections
* Rail car components (center sills, bolsters)
* Specialized transport and hauling equipment
#### **3. Structural & Construction:**
* High-performance beams and columns in buildings
* Bridge components where weight reduction is critical
* Industrial plant structural supports
* Material handling system frameworks
#### **4. Energy & Industrial:**
* Support structures for renewable energy installations (wind, solar)
* Pressure vessel skirts and non-pressure supports
* Heavy industrial base plates and frames
### **Advantages of TMCP (A656 Type 7) over Conventional Grades**
1. **Enhanced Weldability:** Lower preheat costs, reduced risk of welding defects.
2. **Good Strength-Toughness Balance:** Fine TMCP microstructure provides both.
3. **Potential Cost Savings:** Eliminates need for post-rolling heat treatment (normalizing).
4. **Weight Reduction:** 50 ksi yield allows lighter designs vs. A36 steel.
5. **Consistent Quality:** Controlled process ensures uniform properties.
### **Procurement & Quality Notes**
* Condition is **As TMCP Processed** (may be noted as "TMC" or similar).
* Specify: **ASTM A656 Grade 50 Type 7**, dimensions, and any required impact testing.
* Review Mill Test Reports (MTRs) for confirmed CE and Pcm values to plan fabrication.
### **Disclaimer**
This specification is based on the ASTM standard and typical industry data. Properties are achieved through the specific TMCP cycle and may vary slightly. The superior weldability reduces but does not eliminate the need for sound welding practices and procedure qualification where required by code. Always consult the certified MTR and applicable fabrication codes (e.g., AWS D1.1) for the specific material lot.
-:-
For detailed product information, please contact sales.
-:
Bethlehem Steel ASTM A656 Grade 50 Type 7, 3/16 to 2 in. thick, steel plate Specification
Dimensions
Size：
Diameter 20-1000 mm Length <4654 mm
Size:We can customized as required
Standard：
Per your request or drawing
We can customized as required
Properties（Theoretical）
Chemical Composition
-:-
For detailed product information, please contact sales.
-:
Bethlehem Steel ASTM A656 Grade 50 Type 7, 3/16 to 2 in. thick, steel plate Properties
-:-
For detailed product information, please contact sales.
-:
Applications of Bethlehem Steel Flange ASTM A656 Grade 50 Type 7, 3/16 to 2 in. thick, Steel Flange plate
-:-
For detailed product information, please contact sales.
-:
Chemical Identifiers Bethlehem Steel Flange ASTM A656 Grade 50 Type 7, 3/16 to 2 in. thick, Steel Flange plate
-:-
For detailed product information, please contact sales.
-:
Packing of Bethlehem Steel Flange ASTM A656 Grade 50 Type 7, 3/16 to 2 in. thick, Steel Flange plate
-:-
For detailed product information, please contact sales.
-:
Standard Packing:
-:-
For detailed product information, please contact sales.
-:
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 1125 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
