Table of Content
How is the High speed steel M42 round bar manufacturing process conducted?
High-speed steel M42 round bars manufacturing process involves a number of steps. Iron, tungsten, molybdenum, cobalt, and other alloying elements are among the raw materials that are melted in the first step. After melting, the alloy is poured into a mould to form a billet. The billet is heated after which a round bar shape is formed by rolling. To obtain the desired hardness and toughness, it is then heat treated. Annealing, quenching, and tempering are frequently used in the heat treatment process. M42 round bars are heat-treated, quality-checked, and then cut to the desired length. They are then packaged and delivered to the customer.
What are the uses of m42 hss steel round bars?
M42 HSS steel round bars have high wear resistance, toughness, and compressive strength due to their high cobalt and molybdenum content. They are known for their outstanding red hardness, allowing them to maintain their cutting edge at high temperatures. They are also highly resistant to abrasion and thermal fatigue. They are generally used in high-performance cutting tools, such as twist drills, reamers, taps, milling cutters, and broaches, as well as in cold-work tools, such as dies and punches. M42 high-speed steel round bars can also be used in the aerospace, medical, and automotive industries for precision cutting and shaping of parts and components. They are also suitable for use in the woodworking industry for cutting knives and saw blades. They are often used in drilling, boring and milling in heavy and high-tensile alloys and high-hardness materials.
Country | USA | German | Japan |
Standard | ASTM A600 | DIN EN ISO 4957 | JIS G4403 |
Grades | M42 | 1.3247/HS2-9-1-8 | SKH59 |
ASTM A600 | C | Mn | P | S | Si | Cr | V | Mo | W | Co | ||||||||
M42 | 1.05 | 1.15 | 0.15 | 0.40 | 0.03 | 0.03 | 0.15 | 0.65 | 3.50 | 4.25 | 0.95 | 1.35 | 9.00 | 10.00 | 1.15 | 1.85 | 7.75 | 8.75 |
DIN ISO 4957 | C | Mn | P | S | Si | Cr | V | Mo | W | Co | ||||||||
1.3247/HS2-9-1-8 | 1.05 | 1.15 | … | … | … | … | … | 0.70 | 3.50 | 4.50 | 0.90 | 1.30 | 9.00 | 10.00 | 1.20 | 1.90 | 7.50 | 8.50 |
JIS G4403 | C | Mn | P | S | Si | Cr | V | Mo | W | Co | ||||||||
SKH59 | 1.05 | 1.15 | … | 0.40 | 0.03 | 0.03 | … | 0.70 | 3.50 | 4.50 | 0.90 | 1.30 | 9.00 | 10.00 | 1.20 | 1.90 | 7.50 | 8.50 |
Properties | Unit | TEMPERATURE °C / °F | ||
20 / 70 | 400 / 750 | 600 / 1110 | ||
DENSITY | Kg/m³ lbs/in³ | 8.03 .290 | 7.93 .286 | 7.87 .284 |
MODULUS OF ELASTICITY | kN/mm³² psi | 225 33 · 10 6 | 200 29 · 10 6 | 180 26 · 10 6 |
COEFFICIENT OF THERMAL
EXPANSION FROM 20°C / 70°F |
per °C per °F | — | 11.5 · 10-6 6.4 · 10-6 | 11.8 · 10-6 6.6 · 10-6 |
THERMAL CONDUCTIVITY | W/m °C Btu/sq. ft. h °F/in. | 24 166 | 28 194 | 27 187 |
SPECIFIC HEAT | J/kg °C Btu/lb °F | 420 0.10 | 510 0.12 | 600 0.14 |
Mechanical Properties | Metric | Imperial |
Hardness, Rockwell C (oil quenched from 1204°C, 5 minutes) | 64.3 | 64.3 |
Hardness, Rockwell C (oil quenched from 1177°C, 5 minutes) | 65.5 | 65.5 |
Hardness, Rockwell C(oil quenched from 1163°C) | 65.8 | 65.8 |
Izod impact unnotched (oil quenched at 1191°C; 510°C temper temperature) | 13.6 J | 10.0 ft- lb |
Izod impact unnotched (oil quenched at 1191°C; 622°C temper temperature) | 24.4 J | 24.4 J |
Machinability (1% carbon steel) | 35.0 – 40.0% | 35.0 – 40.0% |
Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
Elastic modulus | 190-210 GPa | 27557-30457 ksi |
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Generally, high speed steels are used for machining at high speeds. HSS M42 steel materials are widely used for: