Gnee (Tianjin) Multinational Trade Co., Ltd.
Gnee (Tianjin) Multinational Trade Co., Ltd.
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AISI M42 1.3247 SKH59 Round Steel Bar Round Bar Round Bar Rod Round Steel Bar Stock
| Product name | Round bar rod |
| Diameter | 8-650mm |
| Color | Black,mill,polished,brush,etc |
| Technique | Cold rolled/Hot rolled |
| Application | To prevent the hull from being corroded by chemical corrosion, electro chemical corrosion and sea life and microorganisms. Auto parts, aviation, aerospace hardware tools, chemical and other industries. It is used in make ship body ,decks etc. |
M42 Tool Steel | SKH59 | HS 2-9-1-8 | 1.3247 High Speed Steel. SAE M42 Tool Steel is high cobalt high speed steel. And High Speed Steel toughness and is mainly used for high toughness precision wear-resistant metal cold die.Moreover it also can be used for the cutting tool and the knife in the cooling.
AISI high speed steel material M42 tool steel is a molybdenum-series high-speed steel alloy with an additional 8% cobalt. (HSS Steel M42) 8% Cobalt tool bits are designed for machining work hardening alloys and other tough materials. They have increased water resistance and tool life. This improves performance and retention of the cutting edge.
Supply Form & Size & Tolerance
| Round bar | ||||
| Diameter | 1-16mm | 10-50mm | 50-180mm | 180-300mm |
| Process | Cold Drawn | Hot Rolled | Hot Forged | Free Forging |
| Flat bar | ||||
| Thickness | 1-2.5mm | 1.5-20mm | 20-300mm | |
| Width | Max 800mm | Max 800mm | Max 800mm | |
| Process | Cold Drawn | Hot Rolled | Hot Forged | |
Remark:Tolerance can be customized as per requests
Chemical Composition
| Standard | Grade | C | Mn | P | S | Si | Cr | V | Mo | W | Co |
| ASTM A600 | M42 | 1.05-1.15 | 0.15-0.4 | 0.03 | 0.03 | 0.15-0.65 | 3.5-4.25 | 0.95-1.35 | 9.0-10.0 | 1.15-1.85 | 7.75-8.75 |
| DIN EN ISO 4957 | 1.3247 | 1.05-1.15 | 0.4 | 0.03 | 0.03 | 0.7 | 3.5-4.5 | 0.90-1.30 | 9.0-10.0 | 1.20-1.90 | 7.50-8.50 |
| JIS G4403 | SKH59 | 1.05-1.15 | 0.4 | 0.03 | 0.03 | 0.7 | 3.5-4.5 | 0.90-1.30 | 9.0-10.0 | 1.20-1.90 | 7.50-8.50 |
Physical Property
| Density,g/cm3 | 8.1 |
| Modulus of elasticity,N/mm2 | 220x 10^3 |
| Thermal conductivity,W/m °C | 20 |
| Specific heat,J/kg °C | 429 |
| Electrical Resistivity,ohm*mm2/m | 0.52 |
| Machinability | 35-40% of a 1% carbon steel |
Thermal Expansion
| Temperature | 10^-6 m/(m*K) | 10^-6 in/in °F | |
| °F | °C | ||
| 212 | 100 | 11 | 6.2 |
| 392 | 200 | 11.5 | 6.5 |
| 572 | 300 | 11.9 | 6.7 |
| 752 | 400 | 12.3 | 6.9 |
| 932 | 500 | 12.4 | 7 |
| 1112 | 600 | 12.5 | 7 |
| 1292 | 700 | 12.5 | 7 |
Mechanical Property
| Hardness, Rockwell C(oil quenched from 1163°C, 5 minutes) | 65.8 |
| Hardness, Rockwell C (oil quenched from 1177°C, 5 minutes) | 65.5 |
| Hardness, Rockwell C (oil quenched from 1204°C, 5 minutes) | 64.3 |
| Izod impact unnotched (oil quenched at 1191°C; 510°C temper temperature) | 13.6 J |
| Izod impact unnotched (oil quenched at 1191°C; 622°C temper temperature) | 24.4 J |
| Poisson's ratio | 0.27-0.30 |
| Elastic modulus | 190-210 GPa |
