AISI M1044 Merchant Quality Carbon Steel Flange

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. -: AISI M1044 Merchant Quality Carbon Steel Flange, Composition Spec Product Information -:- For detailed product information, please contact sales. -: AISI M1044 Merchant Quality Carbon Steel Flange, Composition Spec Synonyms -:- For detailed product information, please contact sales. -:

AISI M1044 Merchant Quality Carbon Steel, Composition Spec Product Information -:- For detailed product information, please contact sales. -: # **AISI M1044 Merchant Quality Carbon Steel (Composition Specification)** ## **1. Product Overview** AISI M1044 is a **resulfurized** medium-carbon steel supplied under "Merchant Quality" specifications, designed specifically for **improved machinability**. The "M" prefix in the grade designation indicates the addition of sulfur (and sometimes phosphorus) beyond standard ranges to enhance chip-breaking characteristics and reduce tool wear during high-speed machining operations. This grade is typically produced as hot-rolled or cold-drawn bars, offering an optimal balance between mechanical strength and manufacturing efficiency for volume production of machined components. ## **2. Chemical Composition (Weight %)** The key distinction of M1044 lies in its controlled sulfur content, which differentiates it from standard AISI 1044. | Element | Composition Range (%) | Notes | |---------|---------------------|-------| | Carbon (C) | 0.40 - 0.48 | Provides base strength and hardenability | | Manganese (Mn) | 1.35 - 1.65* | Elevated to combine with sulfur and prevent hot shortness | | Phosphorus (P) | 0.04 max | Typically present at upper limits to aid machinability | | **Sulfur (S)** | **0.24 - 0.33** | **Primary machinability enhancer - forms manganese sulfide inclusions** | | Silicon (Si) | 0.10 - 0.30 | Standard residual | | Iron (Fe) | Balance | - | **Note on Manganese:** The manganese content in M1044 is significantly higher than in standard 1044 (typically 0.60-0.90%). This is deliberately balanced with sulfur at approximately a 4:1 Mn:S ratio to form benign manganese sulfide (MnS) inclusions rather than harmful iron sulfides. ## **3. Physical & Mechanical Properties** *Typical values for hot-rolled condition:* ### **Physical Properties** - **Density:** 7.85 g/cm³ - **Modulus of Elasticity:** 200 GPa (29 × 10⁶ psi) - **Coefficient of Thermal Expansion:** 11.5 × 10⁻⁶/°C (20-100°C) - **Thermal Conductivity:** 51.9 W/m·K ### **Mechanical Properties (As-Rolled)** | Property | Typical Value | |----------|--------------| | Tensile Strength | 620-750 MPa (90-109 ksi) | | Yield Strength (0.2% offset) | 415 MPa min (60 ksi min) | | Elongation (in 50mm) | 18-22% | | Reduction of Area | 35-40% | | **Machinability Rating** | **85-90% (vs. 100% for AISI 1212)** | | Hardness (Brinell) | 187-229 HB | ## **4. Key Characteristics & Metallurgy** ### **Machinability Features** - **Manganese Sulfide Inclusions:** The deliberately added sulfur forms MnS inclusions that: 1. Act as internal chip breakers during machining 2. Provide lubrication at the tool-chip interface 3. Reduce cutting forces and power consumption 4. Allow for higher cutting speeds and feed rates ### **Trade-Off Considerations** - **Reduced Transverse Properties:** MnS inclusions create directional properties - ductility and impact strength are lower in the transverse direction compared to longitudinal. - **Limited Weldability:** The high sulfur content makes M1044 generally **not recommended for welding** as it promotes solidification cracking and porosity. - **Surface Finish:** May produce slightly rougher surface finish compared to non-resulfurized grades when machined at very fine feeds. ## **5. Product Applications** M1044 is specifically selected for high-volume production of parts requiring extensive machining: ### **Primary Applications** - **Automotive Components:** Transmission shafts, gear blanks, steering components, axle shafts - **Fastener Manufacturing:** High-strength bolts, screws, nuts (where machining precedes heat treatment) - **Hydraulic & Pneumatic Parts:** Valve bodies, cylinders, pump components - **Industrial Machinery:** Shafts, spindles, arbors, tool holders - **Hardware & Tools:** Die components, jigs, fixtures ### **Typical Processing Route** 1. Hot rolling to desired form (rounds, hexagons, flats) 2. Optional cold drawing for improved surface finish and tolerances 3. High-speed machining to near-net shape 4. Often followed by heat treatment (quenching and tempering) for final properties ## **6. International Standards & Equivalent Grades** ### **Direct & Close Equivalents** | Country/Region | Standard | Grade Designation | Notes | |----------------|----------|-------------------|-------| | **USA** | ASTM A29/A29M | M1044, M1045 | Standard specification for hot-wrought bars | | **USA** | ASTM A576 | Grade M1044 | Special quality for high-strength applications | | **Germany** | DIN 1654 | 9SMn28 (1.0736) | Similar resulfurized machining steel | | **Japan** | JIS G4804 | SUM43 | Free-cutting structural steel | | **International** | ISO 683/1 | 35S20 | Type C - free-cutting steel | ### **Related Standards** - **SAE J403:** Chemical composition specifications - **SAE J412:** General requirements for carbon steels - **ASTM A108:** Standard for cold-finished carbon steel bars (for cold-drawn M1044) - **AMS 5066:** Aerospace material specification (for specific quality levels) ## **7. Comparison with Standard AISI 1044** | Parameter | AISI 1044 | **AISI M1044** | |-----------|-----------|----------------| | Sulfur Content | ≤0.050% | **0.24-0.33%** | | Manganese Content | 0.60-0.90% | **1.35-1.65%** | | Machinability | ~65% | **85-90%** | | Transverse Ductility | Good | Reduced | | Weldability | Fair (with precautions) | **Not Recommended** | | Primary Advantage | Balanced properties | **Superior Machinability** | | Cost Efficiency | Material cost lower | **Lower machining costs** | ## **8. Summary** AISI M1044 Merchant Quality Carbon Steel represents a **manufacturing-optimized variant** of medium-carbon steel, where composition is specifically tailored to reduce machining time and tooling costs in high-volume production environments. The deliberate addition of sulfur and corresponding manganese increase creates a material that machines with significantly less power consumption, better chip control, and longer tool life compared to non-resulfurized grades. This grade is particularly valuable in industries where large quantities of components require extensive machining operations before final heat treatment. While it exhibits some directional mechanical properties and limited weldability, these limitations are typically acceptable in its intended applications. When selecting M1044, engineers prioritize **production efficiency and machining economics** over isotropic material properties, making it a strategic choice for cost-sensitive, high-volume manufacturing. -:- For detailed product information, please contact sales. -: AISI M1044 Merchant Quality Carbon Steel, Composition Spec Specification Dimensions Size： Diameter 20-1000 mm Length <6066 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. -: AISI M1044 Merchant Quality Carbon Steel, Composition Spec Properties -:- For detailed product information, please contact sales. -:

Applications of AISI M1044 Merchant Quality Carbon Steel Flange, Composition Spec -:- For detailed product information, please contact sales. -: Chemical Identifiers AISI M1044 Merchant Quality Carbon Steel Flange, Composition Spec -:- For detailed product information, please contact sales. -:

Packing of AISI M1044 Merchant Quality Carbon Steel Flange, Composition Spec -:- 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 2537 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