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Powder Metallurgy High Speed Steel (PM HSS)
BRAND: PROMISTEEL
GRADES: PM M4, PM T15, PM M2, PM M42, ASP 23/30/60 Equiv.
SHAPES & SIZES: Round Bar (φ10-500mm), Plate, Sheet, Near-Net Shapes
DELIVERY CONDITION: HIP (Hot Isostatic Pressing), Annealed, Machined
MICROSTRUCTURE: Ultra-fine, Uniform Carbide Distribution, Non-Segregated
HARDNESS: HRC 64 - 70 (Grade Dependent)
APPLICATION: Fine Blanking Dies, Broaches, High-Performance Milling, Cold Forming
MOQ: 25 Tons
Powder Metallurgy High Speed Steel (PM HSS) represents the pinnacle of tool steel technology. Unlike conventional melting and casting, PM HSS is produced through gas atomization and Hot Isostatic Pressing (HIP). This advanced process eliminates the slow cooling phase of traditional ingots, preventing the formation of large, segregated carbides.
The result is a steel with a completely uniform, non-segregated microstructure featuring ultra-fine carbides distributed evenly throughout the matrix. For toolmakers and engineers, this translates to superior grindability, exceptional dimensional stability during heat treatment, and a unique combination of high toughness and wear resistance that conventional HSS cannot achieve.
Products Specifications & Grade Equivalents
We offer a comprehensive range of PM HSS grades, equivalent to major international standards (ASTM, DIN, JIS) and proprietary grades (like ASP series).
Table-1
High-performance grades for the most demanding applications.
Common PM Grades & Equivalents |
||||
| ASTM Grade | ISO Standard | DIN (Germany) | JIS (Japan) | Equivalent Type |
| PM M4 | HS 6-5-4 | 1.3346 | SKH54 |
High Wear & Toughness |
| PM T15 | HS 10-4-3-10 | 1.3207 | SKH58 |
Max Wear Resistance |
| PM M2 | HS 6-5-2 | 1.3343 | SKH51 |
Toughness Focused |
| PM M42 | HS 2-9-1-8 | 1.3247 | SKH59 |
High Red Hardness |
| PM 23 | - | - | - |
Similar to ASP 23 |
| PM 30 | - | - | - |
Similar to ASP 30 |
| PM 60 | - | - | - |
Similar to ASP 60 |
Table-2
Precise alloy content achieved through powder metallurgy.
Chemical Composition (Mass Fraction %) |
||||||
| Grade | C | Cr | V | W | Mo | Co |
| PM M4 | 1.42 | 4 | 4 | 5.5 | 5.25 | - |
| PM T15 | 1.6 | 4 | 5 | 12 | - | 5 |
| PM M2 | 0.85 | 4.15 | 2 | 6.4 | 5 | - |
| PM M42 | 1.1 | 3.75 | 1.15 | 1.5 | 9.5 | 8 |
| PM 10V | 2.45 | 5.25 | 9.75 | - | 1.3 | - |
| PM S390 | 1.64 | 4.8 | 5 | 10 | 2 | 8 |
Table-3
Supply Range & Formats |
||
| Types | Diameter/Thickness (mm) | Width/Length (mm) |
| Round Bars | 10 mm– 500 mm | Customized |
| Flat Bars | 5 mm – 200 mm | 20 mm – 1000 mm |
| Plates | 10 mm – 400 mm | Customized |
| Sheets | 1 mm – 6 mm | Customized |
Key Features and Advantages
Zero Alloy Segregation
The rapid solidification of powder ensures uniform chemical composition, eliminating the weak spots found in conventional steel.
01
Superior Grindability
Fine carbides mean tools can be ground to a sharper edge with less risk of micro-chipping and wheel clogging.
02
Dimensional Stability
The isotropic structure ensures predictable size changes during heat treatment, crucial for complex dies.
03
Enhanced Toughness
PM HSS can withstand higher impact loads than conventional HSS of the same hardness, reducing tool breakage.
04
Higher Alloy Content
The PM process allows for higher Vanadium and Cobalt content (e.g., PM 10V, PM 15V) without making the steel impossible to process.
05
Typical Applications
PM HSS is the problem-solver for applications where conventional HSS fails due to wear or breakage:
Fine Blanking & Punching
Used in high-volume stamping dies where edge retention and toughness are critical.
High-Performance Cutting Tools
Gear hobs, broaches, taps, and end mills that require extended tool life and higher cutting speeds.
Cold Forming Tools
Cold heading dies and extrusion punches that face extreme stress.
Plastic Component Molds
For injection molding abrasive glass-filled plastics, where high wear resistance is needed.
FAQ
Q1: Why is PM HSS more expensive than conventional HSS?
A1: The production process (Atomization + HIP) is more complex and energy-intensive. However, the total cost of ownership is often lower due to significantly extended tool life (often 2-3x longer) and reduced downtime.
Q2: What is the difference between PM M4 and conventional M4?
A2: Chemically they are similar, but physically they are different. Conventional M4 has large, irregular carbides that make it difficult to grind and prone to breaking. PM M4 has fine, uniform carbides, making it much tougher and easier to machine/grind.
Q3: Can PM HSS be coated?
A3: Yes, PM HSS is an excellent substrate for PVD coatings (TiN, TiAlN) because its uniform surface quality allows for better adhesion than conventional HSS.
Q4: What grades are comparable to ASP 23 or ASP 30?
A4: We supply PM grades with equivalent chemical compositions and properties to the popular ASP series, offering a high-performance alternative for powder metallurgy applications.
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