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High strength non-heat treated steel for hot forging
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Characteristics
Component design according to customers' purposes, shape and size of forged parts.
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Advantages
Enables omission of the quenching and tempering process.
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Applied parts
Crank shaft, knuckle, connecting rod
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Steel bar for cold forging
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Characteristics
A wide range of strength and excellent workability
Component design according to the purpose and processing type of customers.
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Advantage
Enables cold forging in a wide range of purposes and processing types
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Applied parts
Piston pins, piston couple
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Steel for high strength connecting rod
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Characteristics
High fatigue and high buckling strength non-heat treated steel
High quality and stable fracture splittability (fracture splittable heel)
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Advantages
Weight reduction and fuel improvement
Enables the omission of manufacturing process
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Applied parts
Connecting rod
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Wire rod for high strength valve spring
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Characteristics
High cleanliness and long life
Maintain high strength and good workability
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Advantages
Reduce spring weight and size of engine
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Applied parts
Valve spring
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Steel for high strength gear (XG5, CM201, etc.)
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Characteristics
Design of components that are optimized for customers' needs
XG5: high tooth surface strength and tooth bending strength
CM201: high cycle bending strength
Decrease of carburized abnormal layers and maintaining the thickness of carburized hardening layers
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Advantages
Weight reduction and fuel improvement
Enables cold forging by combining a spheroidizing heat treatment
XG5: enables cold forging
CM201: realize a high fatigue life
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Applied parts
Gears
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Steel for low distortion, high durability and soft nitriding
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Characteristics
Pitting resistance and high fatigue life resulting from hardening of deep layers
Fatigue strength -
Advantages
Reduced quenching strain enables the omission of the grinding process to correct teeth.
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Applied parts
Gears
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Steel to prevent coarse particles (NSACE™)
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Characteristics
Coarse particle resistance for high-temperature carburizing
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Advantages
Enables high-temperature carburizing and the omission of intermediate heat treatment process
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Applied parts
Gears, shafts, pins and bolts
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Mild Alloy
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Characteristics
Same components as standardized steel
Reduction of hardness with the same rolling process
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Advantages
Enables the omission of annealing treatment process before cold processing.
Same hardness distribution as conventional materials after carburizing and quenching.
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Applied parts
Input shafts, CVJ inner race, differential pinion, cross joints
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Super Mild Alloy
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Characteristics
Addition of trace element
Hardness equivalent to the spheroidizing annealing (SA) materials with the same rolling process
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Advantages
Enables the omission of annealing treatment process before cold processing.
Use of SA enables more softening and longer life of metal molds.
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Applied parts
Gears, shafts
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Steel for high strength and high frequency quenching
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Characteristics
Excellent bearing fatigue strength and bending fatigue strength
Optimal component design according to customers' needs
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Advantages
Enables the omission of carburizing heat treatment
Contributes to the use of high torque and reduction of part size.
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Applied parts
CVJ outer race, shafts
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Super Forge (SF)
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Characteristics
Controlled rolling – improves carbide spheroidizing levels by combining control cooling and spheroidizing annealing
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Advantages
Increase the limit of processing while forging.
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Applied parts
CVJ outer race, shafts
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Steel for direct normalizing treatment (FG, DN)
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Characteristics
Refining of structures using the controlled rolling method.
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Advantages
Enables omission of the normalizing treatment
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Applied parts
Lift axle shafts, piston rods, drive shafts
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High strength and high toughness steel omitting quenching and tempering
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Characteristics
High strength and high toughness equivalent to quenching and tempering steel using our original rolling method
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Advantages
Enables omission of quenching and tempering treatment processes.
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Applied parts
Rollers, links
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High strength suspension spring steel
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Characteristics
Excellent hydrogen embrittlement property and toughness
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Advantages
Improves flexibility of suspension design and weight reduction
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Applied parts
Suspension springs
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Wire rod for steel tire codes
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Characteristics
Reduces hard inclusion and segregation.
Stable code property (strength, etc.) with small component fluctuation.
Our original high strength component design
Thin wire rod (can supply wire rod with diameters of 3.8Φ, 4.0Φ, 4.5Φ)
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Advantages
Enables stable wire drawing processing that prevents disconnection.
Enables weight reduction of tires in the high strength special component menu.
Enables omission of process in the thin wire rod menu.
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Applied parts
Steel codes
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Steel for high strength bolts (MB series, ADS series)
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Characteristics
Controls hydrogen embrittlement（delayed fracture）and contributes to higher strength.
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Advantages
Reduces weight with smaller bolts and reduction of number of mounting bolts
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Applied parts
Steel codes, bolts, nuts
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Boron steel for cold forging (SBR, NHB™)
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Characteristics
Maintains adequate bolt strength without a spheroidizing annealing process by reducing the carbon amount and adding boron.
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Advantages
Enables simplification of heat treatment process
Reduces costs for alloy steel
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Applied parts
Shafts, bolts, nuts
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Non-refining steel for cold forging (NHF™, SUC80D)
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Characteristics
Our original high strength and non-refining component design
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Advantages
Enables omission of quenching and tempering processes after cold forging. (requires bluing treatment)
Enables cold forging while maintaining high strength.
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Applied parts
Shafts, bolts, nuts, ball tie-rods
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Non-annealing type low-carbon aluminum killed steel (SNN*: A/B)
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Characteristics
Controls strain aging.
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Advantages
Enables repeated processes without annealing
Small processing hardening during cold forging
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Applied parts
Shafts, bolts, nuts, ball tie-rod spark plugs
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New soft wire rod (DS, DL)
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Characteristics
In-line softening treatment realizes a hardness level equivalent to the normal annealing to the rolling process.
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Advantages
Extends the life span of metal molds.
Enables omission of the annealing process before wire drawing.
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Applied parts
Shafts, bolts, nuts
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Simple-annealing type wire rods (ED, EC, ES)
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Characteristics
In-line softening treatment realizes the unified refining of annealing structures and reduction of hardness level after annealing.
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Advantages
Extends the life span of metal molds.
Enables simplification (omission of grinding) in the wire drawing process.
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Applied parts
Shafts, bolts, nuts
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Non-refining steel for direct cutting
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Characteristics
A wide range of strength levels
Component design according to customers' purposes
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Advantages
Enables omission of quenching and tempering processes.
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Applied parts
Piston rods, steering rack bars
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Free-cutting steel for machine structures
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Characteristics
Machinery properties equivalent to carbon steel for machine structures and alloy steel for machine structures
Excellent machinability
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Advantages
Extends the life span of tools.
Increases productivity.
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Applied parts
Various automobile parts
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Lead-free free-cutting steel (EZ, SMIGREEN™S, T, CS)
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Characteristics
Excellent machinability (no lead added)
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Advantages
Expands the life span of tools.
Increases productivity.
Reduces environmental load substances.
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Applied parts
Heavy cutting parts, crankshafts, connecting rods, OA shafts
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Wire rod for saw wires (SPURKS™)
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Characteristics
High cleanliness and surface uniformity.
Thin wire rod (can supply wire rod with diameters of 3.8Φ, 4.0Φ, 4.5)
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Advantages
Reduces wire disconnection during wire drawing and cutting processes.
Reduces the cutting loss of silicon wafer, etc. due to thin wires.
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Applied parts
WR for cutting
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SHTB™, steel for high tension bolts
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Characteristics
Controls hydrogen embrittlement and contributes to high strength.
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Advantages
Enables reduction of the size of joint works and construction costs.
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Applied parts
High power bolts
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Steel for fire resistant bolts
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Characteristics
Excellent fire resistance
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Advantages
Applied to connecting bolts of fire resistant (FR) steel for construction structures.
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Applied parts
High power bolts
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Steel for weather resistant bolts
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Characteristics
Excellent weather resistance
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Advantages
Applied to connecting bolts of steel structures such as bridges.
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Applied parts
High power bolts
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Wire rod for high strength bridge cables
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Characteristics
Thick and high strength materials
Received the "Main Award" of the 47th (FY 2014) Ichimura Prize in Industry
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Advantages
Enables the reduction of design flexibility of bridges and decrease of construction costs.
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Applied parts
Bridge cables
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DLP™ wire rod (DLP™: Direct in-Line Patenting)
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Characteristics
Our original in-line heat treatment wire rod.
Excellent balance of strength and extension.
Can be used for a wide range of purposes.
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Advantages
Enables omission of the heat treatment process (LP = lead patenting) by the customer.
Contributes to environmental load reduction by saving energy.
Contributes to the reduction of environmental load substances.
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Applied parts
Bridge cables
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Steel for high strength chain
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Characteristics
Our original component design contributes to high strength.
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Advantages
Enables weight reduction of chains for mooring of marine structures, etc.
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Applied parts
Chains
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TOUGH GUARD™ series
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Characteristics
Maintains 5 times the corrosion resistance of conventional zinc aluminum alloy.
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Advantages
Extends the life span and reduces costs.
Excellent environmental performance
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Applied parts
Wire mesh for bank protection, fences, power lines, etc.
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Thin wire rod(5.0mm, 4.5mm, 4.0mm, 3.8mm, 3.6mm)
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Characteristics
Wire diameter (thin)
Excellent wire drawing capability
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Advantages
Enables omission of the patenting process.
Enables omission of the wire drawing process.
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Applied parts
Valve springs, suspension springs, steel codes, WR for cutting, bridge cables, wire mesh for bank protection, fences, power lines, etc.
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