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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Latrobe Graph-Air® Cold Work Tool Steel Flange (ASTM A10) Product Information
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Latrobe Graph-Air® Cold Work Tool Steel Flange (ASTM A10) Synonyms
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Latrobe Graph-Air® Cold Work Tool Steel (ASTM A10) Product Information
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# **Latrobe Graph-Air® Cold Work Tool Steel (ASTM A10)**
## **Product Overview**
Latrobe Graph-Air® is a unique, proprietary air-hardening cold work tool steel conforming to the ASTM A10 classification. Its defining characteristic is a controlled, fine dispersion of **graphite within a high-alloy steel matrix**, which imparts a distinctive set of performance benefits. This innovative microstructure provides **superior machinability, excellent wear resistance, and exceptional vibration damping**, making it an ideal choice for intricate tools, high-volume production components, and applications where resistance to galling and seizing is critical.
## **Key Features & Benefits**
* **Unparalleled Machinability:** The free-graphite particles act as a chip-breaker and lubricant during machining, dramatically improving machinability compared to conventional tool steels of similar hardness, significantly reducing tool wear and production time.
* **Excellent Wear & Galling Resistance:** The graphite provides inherent lubricity at the tool-workpiece interface, reducing friction, heat generation, and adhesion (galling). This is combined with good abrasive wear resistance from the alloy matrix.
* **Superior Vibration Damping:** The graphite phase effectively absorbs vibrational energy, making Graph-Air® ideal for tools prone to chatter (e.g., long-reach boring bars, taps, fine-pitch broaches), resulting in improved surface finish and extended tool life.
* **Good Dimensional Stability:** As an air-hardening steel, it exhibits minimal distortion during heat treatment.
* **Consistent Performance:** The uniform graphite dispersion ensures predictable and reliable behavior in both machining and service.
## **International Standard & Designations**
* **Primary Standard:** **ASTM A681-08 (R2019):** Standard Specification for Tool Steel Alloy.
* **Grade:** **A10** (Graphitic, Air-Hardening)
* **Manufacturer's Designation:** **Latrobe Graph-Air®**
* **Unified Numbering System (UNS):** **T30110**
* **Common International Equivalents (Functional):**
* There is no direct, widespread international equivalent due to its unique graphitic composition.
* **Germany (DIN):** The concept is similar to graphitized 1.2842, but the alloy base differs significantly.
* It is functionally compared to other highly machinable, wear-resistant grades but is distinguished by its graphite content.
## **Chemical Composition (%, typical - ASTM A10)**
The composition is engineered to support a hardenable matrix while facilitating stable graphite formation.
| Carbon (C) (Total) | Graphite (C) | Manganese (Mn) | Silicon (Si) | Nickel (Ni) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) | Iron (Fe) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1.25 - 1.50 | ~1.00* (approx.) | 1.60 - 2.10 | 0.90 - 1.30 | 1.55 - 2.05 | 0.90 - 1.40 | 1.00 - 1.50 | 0.10 - 0.30 | Balance |
*\*Note: A significant portion of the total carbon is present in the form of free graphite nodules.*
## **Physical & Mechanical Properties (Typical)**
| Property | Value / Description |
| :--- | :--- |
| **Density** | ~7.6 g/cm³ (Slightly lower than solid steel due to graphite) |
| **Hardness (Annealed)** | 210-240 HB (Brinell) |
| **Hardness (Heat Treated)** | **58 - 62 HRC** (Typical optimal working range) |
| **Austenitizing Temperature** | 815 - 845°C (1500 - 1550°F) – **Significantly lower than most air-hardening steels.** |
| **Quenching Medium** | Air (Still or Forced) |
| **Tempering Temperature** | 150 - 425°C (300 - 800°F). Often tempered at 175-205°C (350-400°F) for maximum hardness. |
| **Machinability** | **Excellent** – Rated 85-100% of a 1% carbon steel (B1112) benchmark. |
| **Toughness** | Moderate to Good. |
## **Product Applications**
Latrobe Graph-Air® excels in applications requiring complex machining, wear resistance, and low friction.
* **Intricate Tooling:** Master hubs, intricate form tools, gears, cams, and complex dies that are difficult to machine from conventional steels.
* **Wear Parts with Machining Challenges:** Gibs, ways, wear plates, and guide components that require both durability and extensive machining.
* **Cutting & Forming Tools Prone to Galling:** Punches, dies, and forming rolls for non-ferrous metals (aluminum, brass, copper) and sticky materials like plastics.
* **Chatter-Sensitive Tools:** Long boring bars, precision taps, fine-pitch hobs, and broaches where vibration damping improves finish and life.
* **Gauges and Fixtures:** Requiring stability, wear resistance, and ease of final fitting/machining.
## **Processing & Heat Treatment Notes**
* **Machining:** **Exceptionally good.** Can be machined at higher speeds and feeds with excellent chip control and prolonged cutter life. Produces a characteristic "smoky" dust due to graphite.
* **Heat Treatment:** Key to its performance. The **low austenitizing temperature** is critical to preserve the graphite phase. Overheating will dissolve graphite, destroying its key benefits. Use controlled atmosphere or salt bath to prevent decarburization. Air quench. Single temper is usually sufficient due to low retained austenite.
* **Grinding:** Grinds well, but the graphite can load grinding wheels. Use sharp, open-structure wheels and proper cleaning.
* **Surface Treatments:** **Not typically recommended for nitriding or carburizing**, as these processes interact with the surface graphite. TiN or CrN coatings can be applied to clean, properly prepared surfaces.
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**Disclaimer**
*Latrobe Graph-Air® is a unique, proprietary tool steel. The information provided is representative of A10-type graphitic steels. Its successful use depends heavily on adhering to its specific low-temperature heat treatment cycle. It is the responsibility of the end-user to obtain and strictly follow the latest official technical data sheets and processing guidelines from Latrobe Specialty Steel for this specific grade. Misapplication of standard high-temperature tool steel heat treatment practices will result in failure to achieve its designed properties.*
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Latrobe Graph-Air® Cold Work Tool Steel (ASTM A10) Specification
Dimensions
Size：
Diameter 20-1000 mm Length <5353 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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Latrobe Graph-Air® Cold Work Tool Steel (ASTM A10) Properties
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Applications of Latrobe Graph-Air® Cold Work Tool Steel Flange (ASTM A10)
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Chemical Identifiers Latrobe Graph-Air® Cold Work Tool Steel Flange (ASTM A10)
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Packing of Latrobe Graph-Air® Cold Work Tool Steel Flange (ASTM A10)
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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 1824 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
