High-function bar and wire rod products

High strength non-refining steel for hot forging

[Characteristics]

• Component design according to the purpose, form and size of forged products on the customer side.

• Enables omission of quenching and tempering processes.

Steel bar for cold forging

[Characteristics]

• A wide range of strength and excellent workability
• Component design according to the purpose and processing type of customers.

• Enables cold forging for a wide range of purposes and processing types.

• Steel for high strength connecting rod

[Characteristics]

• High fatigue and high buckling non-refining steel
• High quality and stable fracture splittability with a large end part rupture/separation corresponding type.

• Contributes to weight reduction and fuel improvement.
• Enables omission of manufacturing processes.

Wire rod for high strength valve suspension

[Characteristics]

• High cleanliness and long life
• Satisfies both high strength and good workability

• Reduces string weight and engine size.

Steel for high strength gears (XG5, CM201, etc.)

[Characteristics]

• Optimal component design according to customers' needs.
• XG5: excellent tooth strength and tooth bending strength
• CM201: excellent cycle bending strength, reduces carburized abnormal layers and provides thick carburized hardening-layers.

• Contributes to weight reduction and fuel improvement.
• Enables cold forging in combination with spheroidizing heat treatment.
• XG5: enables cold forging
• CM201: realizes longer fatigue life

Low-distortion and high durability steel for soft nitriding

[Characteristics]

• Pitching resistance resulting from hardening of deep layers, high fatigue strength

• Enables omission of the tooth repair cutting process by quenching to reduce distortion.

Coarse grain prevention steel (NSACE^™)

[Characteristics]

• Coarse grain prevention during high-temperature carburizing.

• Enables omission of high-temperature carburizing and intermediate heat treatment processes.

Mild alloy

[Characteristics]

• Same components as standardized steel.
• Reduces hardness with the same rolling method.

• Enables omission of the annealing treatment process before cold processing.
• Same hardness distribution as conventional materials after carburizing and quenching.

Super Mild Alloy

[Characteristics]

• Addition of trance element.
• Hardness equivalent to spheroidizing annealing (SA) with the same rolling method.

• Enables omission of the annealing treatment process before cold processing.
• Enables further softening and extension of life of metal molds when SA is adapted.

Steel for high strength and high frequency quenching

[Characteristics]

• Excellent bearing fatigue strength and bending fatigue strength
• Optimal component design according to customers' needs.

• Enables omission of the carburizing heat treatment process
• Contributes to high-torque types and reducing part size.

Super Forge (SF)

[Characteristics]

• Controlled rolling – the combination of controlled cooling and spheroidizing annealing improves the level of spheroidizing of carbides.

• Contributes to increasing the limit of processing when forging

Steel for direct normalizing treatment (FG, DN)

[Characteristics]

• Refining of structures using the controlled rolling method.

• Enables omission of the normalizing treatment process.

High-strength, high-toughness steel without the quench-and-temper process

[Characteristics]

• Our unique rolling method achieves high strength and high toughness equivalent to quenched and tempered steel.

• The steel is available to reduce the quench-and-temper process.

Steel for high strength suspension springs

[Characteristics]

• Excellent hydrogen embrittlement resistance and toughness

• Contributes to the improvement of suspension design flexibility and weight reduction.

• Wire rod for steel tire codes

[Characteristics]

• Reduces hard inclusions and segregation
• Stable code property (strength, etc.) with small component fluctuations.
• Our original high strength component design
• Thin wire rod (can supply wire rod with diameters of 3.8Φ, 4.0Φ and 4.5Φ)

• Enables a stable wire drawing processing that prevents disconnection.
• High-strength special component menu enables weight reduction of tires.
• Thin wire rod menu enables omission of processes.

• Steel for high-strength bolts (MB series, ADS series)

[Characteristics]

• Controls hydrogen embrittlement (delayed fracture) and contributes to high strength.

• Contributes to the weight reduction by decreasing bolt size and the number of construction bolts.

Boron steel for cold forging (SBR, NHB^™)

[Characteristics]

• Maintains adequate bolt strength without a spheroidizing annealing process by reducing the carbon amount and adding boron.

• Enables simplification of heat treatment process.
• Reduces costs for alloy steel.

• Non-refining steel for cold forging (NHF^™, SUC80D)

[Characteristics]

• Our original high-strength and non-refining component design

• Enables omission of quenching and tempering processes after cold forging. (requires bluing treatment)
• Enables cold forging while maintaining high strength.

Non-annealing type low-carbon aluminum killed steel (SNH^*: A/B)

[Characteristics]

• Prevents strain aging

• Enables repeated processes without annealing
• Small processing hardening during cold forging

• New soft wire rod (DS, DL)

[Characteristics]

• In-line softening treatment realizes a hardness level equivalent to that of the normal annealing with the same rolling process.

• Extends the life span of metal molds.
• Enables omission of the annealing process after wire drawing.

• Simplified annealing wire rod (ED, EC, ES)

[Characteristics]

• In-line softening treatment realizes uniform refining of annealing structures.
• Reduces hardness level after annealing.

• Extends the life span of metal molds.
• Enables simplification (omission of grinding) in the wire drawing process.

Non-refining steel for direct cutting

[Characteristics]

• A wide range of strength
• Component design according to customers' purposes

• Enables omission of quenching and tempering processes.

Free-cutting steel for machine structure

[Characteristics]

• Machinery properties equivalent to carbon steel for machine structures and alloy steel for machine structures
• Excellent machinability

• Extends the life span of tools.
• Increases productivity.

• Lead-free free-cutting steel (EZ, SMIGREEN^™ S, T, CS)

[Characteristics]

• Excellent machinability (no lead added)

• Expands the life span of tools.
• Increases productivity.
• Reduces environmental load substances.

• Wire rod for saw wires (SPURKS^™)

[Characteristics]

• High cleanliness and surface uniformity.
• Thin wire rod (can supply wire rod with diameters of 3.8Φ, 4.0Φ, 4.5)

• Reduces wire disconnection during wire drawing and cutting processes.
• Reduces the cutting loss of silicon wafer, etc. due to thin wires.

SHTB^™, steel for high tension bolt

[Characteristics]

• Controls hydrogen embrittlement and contributes to high strength.

• Enables reduction of the size of joint works and construction costs.

Steel for fire resistant bolts

[Characteristics]

• Excellent fire resistance

• Applied to connecting bolts of fire resistant (FR) steel for construction structures.

Steel for weather resistant bolts

[Characteristics]

• Excellent weather resistance

• Applied to connecting bolts of steel structures such as bridges.

• Wire rod for high strength bridge cables

[Characteristics]

• Thick and high strength materials
• Received the "Main Award" of the 47th (FY 2014) Ichimura Prize in Industry.

• Enables the reduction of design flexibility of bridges and decrease of construction costs.

Steel for high strength chains

[Characteristics]

• Our original component design contributes to high strength.

• Enables weight reduction of chains for mooring of marine structures, etc.

NIPPON STEEL group's new zinc alloy plated steel wire products with high corrosion resistance

• TOUGH GUARD^™ series

See the special page for details.

• Extends the life span and reduces costs.
• Excellent environmental performance

• Thin wire rod

(5.0 mm, 4.5 mm, 4.0 mm, 3.8 mm, 3.6 mm)

[Characteristics]

• Wire diameter (thin)
• Excellent wire drawing capability

• Enables omission of the patenting process.
• Enables omission of the wire drawing process.

• DLP^™ wire rod

(DLP^™: Direct in-Line Patenting)

[Characteristics]

• Our original in-line heat treatment wire rod.
• Excellent balance of strength and extension.
• Can be used for a wide range of purposes.

• Enables omission of the heat treatment process (LP = lead patenting) by the customer.
• Contributes to environmental load reduction by saving energy.
• ontributes to the reduction of environmental load substances.