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Flexite® - is a tough, shock and fatigue resisting Chrome-Nickel-Moly alloy steel.
Flexite® - Chrome-Nickel-Moly Alloy Shafting -
Hot Rolled, Quenched & Tempered
Flexite® 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. Most bars are delivered in the hot rolled, heat-treated condition, with a hardness range of 269-341 BHN. For most applications, Flexite® is both hard and tough enough to be used without additional hardening. Flexite® is quenched and tempered, stress relieved and machine straightened prior to shipment. 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.
Flexite® - Technical Summary
Standard Stock Sizes
Round Bars
3/8" thru 31/4" in 1/8" increments
31/2" thru 83/4" in 1/4" increments
9" thru 121/2" in 1/2" increments
13" thru 17" in 1" increments
Note: 101/2" diameter and larger are rough turned 1/8" oversize.
Square Bars
1/2" thru 11/2" in 1/8" increments
13/4" thru 3" in 1/4" increments
31/2" thru 6" in 1/2" increments
Over 6" forged bars on application7/16” thru 6”
Flexite® - Chemistry
(insert typical properties chart)
Flexite® - Approved Welding Rod and Wire
Suggested AWS electrodes are as follows:
AWS Classifications
E8018-C3 7018
E8018-W 7018-M
E90180M 10018-M
Flexite® - Recommended material processing
Welding
Flexite® has fair to good welding characteristics. Can be readily gas or arc welded. Welding electrodes of close to the same composition are recommended. Be sure to use a dry mated rod when arc welding. This will retard excess grain growth. Preheating to 250° F suggested. Since Flexite® has air-hardening properties, stress relieving or normalizing following the welding process is recommended. Post-heating to 300- 350° F also acceptable. The following steps should be followed to obtain maximum performance from these electrodes.
Proper Current – Set the power source for the proper amperage, from the table below, on either direct current, reverse polarity, or alternating current.
Starting Technique – Restrike the electrode ahead of the usual starting point and back step to the previous bead. Reduce arc length to proper height and proceed.
Do Not Use a Whipping Technique – A whipping technique, as might be used with a 6010 electrode, results in porosity in the weld metal. Use a straightforward progression in all positions. Weaving may be used as long as a short arc length is maintained. Diameters 3⁄32", 1⁄8", and 5⁄32" are all position electrodes, 3⁄16", 7⁄32" and 1⁄4" diameter electrodes are recommended for flat or horizontal fillet work only.
Machining
Flexite® has a fine grain microstructure (8-9) with closely controlled carbide particles, which provide improved machinability. The oil quench and temper process of Flexite®, 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.
Hot Rolled, Quenched & Tempered
Flexite® 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. Most bars are delivered in the hot rolled, heat-treated condition, with a hardness range of 269-341 BHN. For most applications, Flexite® is both hard and tough enough to be used without additional hardening. Flexite® is quenched and tempered, stress relieved and machine straightened prior to shipment. 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.
Flexite® - Technical Summary
Standard Stock Sizes
Round Bars
3/8" thru 31/4" in 1/8" increments
31/2" thru 83/4" in 1/4" increments
9" thru 121/2" in 1/2" increments
13" thru 17" in 1" increments
Note: 101/2" diameter and larger are rough turned 1/8" oversize.
Square Bars
1/2" thru 11/2" in 1/8" increments
13/4" thru 3" in 1/4" increments
31/2" thru 6" in 1/2" increments
Over 6" forged bars on application7/16” thru 6”
Flexite® - Chemistry
(insert typical properties chart)
Flexite® - Approved Welding Rod and Wire
Suggested AWS electrodes are as follows:
AWS Classifications
E8018-C3 7018
E8018-W 7018-M
E90180M 10018-M
Flexite® - Recommended material processing
Welding
Flexite® has fair to good welding characteristics. Can be readily gas or arc welded. Welding electrodes of close to the same composition are recommended. Be sure to use a dry mated rod when arc welding. This will retard excess grain growth. Preheating to 250° F suggested. Since Flexite® has air-hardening properties, stress relieving or normalizing following the welding process is recommended. Post-heating to 300- 350° F also acceptable. The following steps should be followed to obtain maximum performance from these electrodes.
Proper Current – Set the power source for the proper amperage, from the table below, on either direct current, reverse polarity, or alternating current.
Starting Technique – Restrike the electrode ahead of the usual starting point and back step to the previous bead. Reduce arc length to proper height and proceed.
Do Not Use a Whipping Technique – A whipping technique, as might be used with a 6010 electrode, results in porosity in the weld metal. Use a straightforward progression in all positions. Weaving may be used as long as a short arc length is maintained. Diameters 3⁄32", 1⁄8", and 5⁄32" are all position electrodes, 3⁄16", 7⁄32" and 1⁄4" diameter electrodes are recommended for flat or horizontal fillet work only.
Machining
Flexite® has a fine grain microstructure (8-9) with closely controlled carbide particles, which provide improved machinability. The oil quench and temper process of Flexite®, 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.
