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Microsteel® - is a tough, shock and fatigue resisting Chrome-Nickel-Moly
alloy steel.
Microsteel® - Chrome-Nickel-Moly Alloy Shafting - Ground and Polished
Microsteel® is a tough, shock and fatigue resisting Chrome-Nickel-Moly alloy steel. In the delivered heat-treated condition, it has the highest combination of tensile strength and ductility while maintaining comparable high machinability. Bars are delivered in the heat-treated hardness range of 269-341 BHN. For most applications, Microsteel is both hard and tough enough to be used without additional hardening. Microsteel is quenched and tempered, stress relieved and machine straightened prior to grinding. This process insures proper grain structure alignment, removal of longitudinal stress factors and confines hardness range to within 2% variance in any bar or plate section. Most air-cooled alloy products, except tool steel, cannot meet these qualifications. A slight reduction in hardness from surface to core is more desirable than “air-hardened through hardness” since this provides much higher ductility and resistance to shock.
Special lengths, non-standard diameters, metric sizes and special tolerances can be manufactured to your specifications. All bars are inspected for total indicator reading (RUN-OUT) and surface condition prior to shipment. Bars are sprayed with protective coating. Individual fiber tubes or canvas wrap/wood slats are used for all shipments. Wooden boxes available upon request.
Microsteel® - Technical Summary
Standard Tolerance
Diameters Limits
7/16” thru 4” +.000 - .002
4-1/8” thru 6” +.000 - .003
Standard Stock Sizes
7/16” thru 6” 1/16” increments
Standard Stock Lengths
20 - 24 Ft.
Microsteel® - Recommended material processing
Machining
Microsteel® has a fine grain microstructure (8-9) with closely controlled carbide particles, which provide improved machinability. The oil quench and temper process of Microsteel®, followed by controlled stress relieving, insures against distortion and run-out so commonly found in air-hardened alloys. Turning, boring and facing is more easily accomplished using mated tungsten-carbide inserts with chip-breaker. Listed below are helpful tables as machining guide.
Cutting Keyways
Use a three or four fluted high-speed end mill; with widths up to 1/2", use up to 60 RPM; over 1/2" wide, reduce RPM to the 25/40 range. Take the full depth of keyways up to 5/8" deep in one pass. Use two passes for depths greater than 5/8". Use a good coolant to keep the cutter and steel cool. A special word about keyways – The majority of fatigue failures in shafting made from any steel can be traced back to sharp corners and notches like those found at the base of a square cornered keyway. To greatly increase your shafting life put a small radius at the corners of the keyways and put a corresponding radius on the matching corners of the key.
Microsteel® is a tough, shock and fatigue resisting Chrome-Nickel-Moly alloy steel. In the delivered heat-treated condition, it has the highest combination of tensile strength and ductility while maintaining comparable high machinability. Bars are delivered in the heat-treated hardness range of 269-341 BHN. For most applications, Microsteel is both hard and tough enough to be used without additional hardening. Microsteel is quenched and tempered, stress relieved and machine straightened prior to grinding. This process insures proper grain structure alignment, removal of longitudinal stress factors and confines hardness range to within 2% variance in any bar or plate section. Most air-cooled alloy products, except tool steel, cannot meet these qualifications. A slight reduction in hardness from surface to core is more desirable than “air-hardened through hardness” since this provides much higher ductility and resistance to shock.
Special lengths, non-standard diameters, metric sizes and special tolerances can be manufactured to your specifications. All bars are inspected for total indicator reading (RUN-OUT) and surface condition prior to shipment. Bars are sprayed with protective coating. Individual fiber tubes or canvas wrap/wood slats are used for all shipments. Wooden boxes available upon request.
Microsteel® - Technical Summary
Standard Tolerance
Diameters Limits
7/16” thru 4” +.000 - .002
4-1/8” thru 6” +.000 - .003
Standard Stock Sizes
7/16” thru 6” 1/16” increments
Standard Stock Lengths
20 - 24 Ft.
Microsteel® - Recommended material processing
Machining
Microsteel® has a fine grain microstructure (8-9) with closely controlled carbide particles, which provide improved machinability. The oil quench and temper process of Microsteel®, followed by controlled stress relieving, insures against distortion and run-out so commonly found in air-hardened alloys. Turning, boring and facing is more easily accomplished using mated tungsten-carbide inserts with chip-breaker. Listed below are helpful tables as machining guide.
Cutting Keyways
Use a three or four fluted high-speed end mill; with widths up to 1/2", use up to 60 RPM; over 1/2" wide, reduce RPM to the 25/40 range. Take the full depth of keyways up to 5/8" deep in one pass. Use two passes for depths greater than 5/8". Use a good coolant to keep the cutter and steel cool. A special word about keyways – The majority of fatigue failures in shafting made from any steel can be traced back to sharp corners and notches like those found at the base of a square cornered keyway. To greatly increase your shafting life put a small radius at the corners of the keyways and put a corresponding radius on the matching corners of the key.
