High speed steel catalog
High Speed Steels Series
Our company offers the following high speed steel
Introduction to high speed steel
High-speed steel is a specialty tool known for maintaining high hardness at elevated temperatures, typically up to 595°C (1100°F) (e.g., 48 HRC). This property makes it particularly suitable for cutting tools for high-speed machining of metals, such as drills, milling cutters, and turning tools. It is often called “red hardness” due to its resistance to softening at high temperatures.
Composition and Classification
High-speed steel is a complex, multi-component alloy system consisting of molybdenum (Mo) and tungsten (W) as the main alloying elements, with the addition of chromium (Cr), vanadium (V) and cobalt (Co). The classification is based on the standards of the American Iron and Steel Institute (AISI) and is divided into two main groups:
Group M (molybdenum-based high-speed steels): With molybdenum as the main alloying element, they are divided into two subgroups:
Subgroups containing only molybdenum or small amounts of tungsten, e.g. M1, M7, M10.
Subgroups containing molybdenum and a large amount of tungsten, e.g. M2, M3, M4.
Group T (tungsten-based high-speed steels): Tungsten is the main alloying element, e.g. T1, T2, T4, T5, T6, T8, T15.
Typical steel grades in Group M and Group T (e.g. M1, M2, T1) are very similar in terms of properties and cutting performance and can be used interchangeably in many applications. In addition, certain high-alloyed types (e.g., cobalt-containing modifications) can be tempered to ultra-high hardness (69-70 HRC).
Key Properties
The unique properties of HSS derive from its alloying composition and processing and include the following key features:
- High-temperature hardness and wear resistance: thanks to the presence of alloying carbides such as M₆C and MC-type carbides, HSS maintain their hardness (63-70 HRC) at high temperatures, with wear resistance ratings of 7-9.
- Toughness: Depending on the specific steel grade, toughness ratings range from 3 to 8. Steel can withstand some impact and mechanical stress.
- Processing Properties: a. Hardening at elevated temperatures near the melting point. b. Fine austenitic grain size. c. Deep hardening by static air cooling. d. Significant secondary hardening effect during tempering.
Basic Product Information
AISI M2 / DIN 1.3343 / JIS SKH51
Chemical composition
| Element | Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) | Tungsten (W) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) |
| M2 Steel (AISI) | 0.78 – 0.88% | 3.75 – 4.50% | 4.50 – 5.50% | 1.75 – 2.20% | 5.50 – 6.75% | 0.20 – 0.45% | 0.15 – 0.40% | ≤0.03% | ≤0.03% |
| 1.3343 Steel (DIN) | 0.86 – 0.94% | 3.80 – 4.50% | 4.70 – 5.20% | 1.70 – 2.10% | 5.90 – 6.70% | ≤0.45% | ≤0.40% | ≤0.030% | ≤0.030% |
| SKH51 Steel (JIS) | 0.80 – 0.88% | 3.80 – 4.50% | 4.70 – 5.20% | 1.70 – 2.10% | 5.90 – 6.70% | ≤0.45% | ≤0.40% | ≤0.030% | ≤0.030% |
Characteristics
M2 steel is a high-speed tool with excellent wear resistance, high red hardness, and good toughness. It is ideal for cutting tools used at high speeds and temperatures.
Applications
Drills/Milling cutters/Taps/Saw blades/Woodworking tools (chisels, planers, router bits)/Cold work tools (punches, dies)/Broaches/Reamers/Gear cutting tools (hobs)
AISI M35 / DIN 1.3243 / JIS SKH55
Chemical composition
| Element | Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) | Tungsten (W) | Cobalt (Co) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) |
| AISI M35 Steel | 0.87 – 0.95% | 3.80 – 4.50% | 4.70 – 5.20% | 1.70 – 2.10% | 5.90 – 6.70% | 4.50 – 5.00% | ≤0.45% | ≤0.40% | ≤0.030% | ≤0.030% |
| DIN 1.3243 Steel | 0.87 – 0.95% | 3.80 – 4.50% | 4.70 – 5.20% | 1.70 – 2.10% | 5.90 – 6.70% | 4.50 – 5.00% | ≤0.45% | ≤0.40% | ≤0.030% | ≤0.030% |
| JIS SKH55 Steel | 0.87 – 0.95% | 3.80 – 4.50% | 4.70 – 5.20% | 1.70 – 2.10% | 5.90 – 6.70% | 4.50 – 5.00% | ≤0.45% | ≤0.40% | ≤0.030% | ≤0.030% |
Characteristics
M35 steel is a high-speed tool steel known for its exceptional red hardness, superior wear resistance, high hardness, good toughness, and enhanced properties due to cobalt addition.
Applications
Drills/Milling cutters/Taps/Saw blades/Broaches/Reamers/Hobs/Chisels/Planers/Router bits/Precision stamping dies/Thread rolling dies/Blanking dies/Punches/Shear blades
AISI M42 / DIN 1.3247 / JIS SKH59
Chemical composition
| Element | Carbon (C) | Chromium (Cr) | Molybdenum (Mo) | Vanadium (V) | Tungsten (W) | Cobalt (Co) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) |
| AISI M42 Steel | 1.08% | 3.90% | 9.40% | 1.20% | 1.50% | 8.00% | 0.25% | 0.25% | N/A | N/A |
| DIN 1.3247 Steel | 1.05 – 1.15% | 3.50 – 4.50% | 9.00 – 10.0% | 0.90 – 1.30% | 1.20 – 1.90% | 7.50 – 8.50% | ≤0.70% | ≤0.40% | ≤0.030% | ≤0.030% |
| JIS SKH59 Steel | 1.05 – 1.15% | 3.50 – 4.50% | 9.00 – 10.00% | 0.90 – 1.30% | 1.20 – 1.90% | 7.50 – 8.50% | ≤0.70% | ≤0.40% | ≤0.030% | ≤0.030% |
Characteristics
M42 steel is a high-speed tool steel known for its exceptional red hardness, superior wear resistance, and high hardness due to its high cobalt content.
Applications
High-speed drills/End mills/Taps/Broaches/Saw blades/Milling cutters/Reamers/Gear cutting tools/Woodworking tools for abrasive materials
The advantages of Aobo Steel
- While ensuring quality, our prices are approximately 3% lower than the market price.
- Before shipment, all our goods undergo 100% strict component testing, UT testing, and hardness testing.
- Our over 20 years of experience in forged tool steel production gives us a deep understanding of our products.
- We offer over 100 types of steel, including tool, alloy, stainless, alloy structural, and carbon steel.
- Surrounded by over 40 processing suppliers, we can deliver more than 2,000 tons of steel monthly.
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