Features of Our Steel Materials
The materials handled by PROSTEEL are broadly classified into four categories: Specialty Steel, Stainless Steel, Carbon Steel (Ordinary Steel) & Surface-Treated Steel, and Aluminum & Non-Ferrous Metals.
We offer an extensive lineup, primarily focusing on thin and medium-thickness steel strips.
Please feel free to contact us regarding steel grades not listed here.
Automotive Components
The steel materials provided by PROSTEEL are used in many everyday products.
In particular, they are widely used in components that support the safety and reliability of automobiles.
- Safety
- Engines
- Transmissions
- Sensors
- Exteriors
- Mufflers
- Batteries
- Seats
- Doors
Safety
Seat Belt
Horn
Engine
Direct Injection Pump
Water Pump
Transmission
AT Plate
HV Damper
Sensors
O2 Sensor / AF Sensor / ABS Sensor
Exterior
Molding
Muffler
Muffler
Battery
Bus Bar
Seat
Seat Gear
Door
Latch
Specialty Steel
These materials are heat-treated to achieve hardness before use.
They are used in applications requiring strength, such as automotive components.
Seat Belts
Used for the metal fittings of seat belts.
AT Plates
Used for internal parts inside automotive automatic transmissions (AT) and continuously variable transmissions (CVT).
Industrial Blades (Circular Saws)
Used for blades designed to cut residential lumber and automotive parts.
- Cold-Rolled Specialty Steel Strip
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Category Steel Grades Handled Carbon Steel for Machine Structural Use (SC) S35CM through S70CM, N63C, and SAE1035 through SAE1070 Carbon Tool Steel (SK) SK85M Alloy Steel for Structural Use (SCR/SCM) SCM415M through SCM435M Others (SUP/SUJ) SUP6M, SUP10M, and SUJ2
- Hot-Rolled Specialty Steel Strip
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Category Steel Grades Handled Carbon Steel for Machine Structural Use (SC) S20C through S55C, N22CB through N28CB, N63C, SAE1020 through SAE1060, and SB25 Carbon Tool Steel (SK) SK85 Alloy Tool Steel (SKS) SKS5 and NKS59 Alloy Steel for Structural Use (SCR, SCM) SCM415 through SCM435, and SCR415 through SCR420 Others (SUP, SUJ) SUJ2
- Others
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Category Steel Grades Handled Bainitic Steel NBS45 through NBS60 Quenched Steel Strip Quenched SK85
Stainless Steel
These materials are corrosion-resistant and offer excellent aesthetic appeal, workability, and heat resistance.
They are used for exterior parts that require aesthetic appeal and for applications that require corrosion resistance.
High-Pressure Gasoline Direct-Injection Pump
Used for components that make up direct-injection pumps.
Muffler Pipe
Used for muffler piping.
Kitchen
Used for sinks and similar applications.
- Stainless Steel
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Category Steel Grades Handled Ferritic JIS Standards SUS430, SUS430LX, and SUS444 NSSC Series NSS409M1, NSS410M1, NSSC430D, NSS432, NSSC436S, NSS442M3, NSS-HR1, NSSEM3, NCA1, NCA2, and NSSID-1 Austenitic JIS Standards SUS301, SUS301L, SUS304, SUS305, SUS304L, SUS310S, SUS316, and SUS316L NSSC Series NSS304ES, NSS304M2, NSS305M1, NSSXM-7, NSS-ER1, and NSSSCR Martensitic JIS Standards SUS410 and SUS420J2 Precipitation-Hardening JIS Standards SUS631 Duplex NSSC Series NSS431DP2 and NSSCFW1
Carbon Steel (Ordinary Steel) & Surface-Treated Steel
Carbon Steel (Ordinary Steel)
This general-purpose steel is used in a wide range of applications after secondary processing, such as painting or plating.
Surface-Treated Steel Sheet
Surface-treated steel sheets are materials with various surface treatments applied according to the application.
They are used for outdoor applications that require corrosion resistance.
Gas Heat Pump
Used for outer panels and internal components of air conditioning units in residential and commercial facilities.
SOFC
Used for outer panels of fuel cell systems that generate electricity using hydrogen or other fuels.
Kerosene Portable Heater
Used for outer panels, fuel tanks, and other components.
- Carbon Steel (Ordinary Steel)
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Category Steel Grades Handled Carbon Steel Sheet SPHC, SPHE, SPCC, and SPCE Surface-Treated Steel Sheet SECC, SGCC, SGHC, SGACC, and SAD1 High-Tensile Steel Sheet SPFC440, SPFC590, SAPH440, and SPFH590 ZAM Steel Sheet MSM-HC-DZC, MSM-HC-DMO, MSM-CC-DZC, MSM-CE-DZC, MSM-CU-DZG, and MSM-CU-DZJ
Aluminum & Non-Ferrous Metals
This material is lighter and softer than common metals. Because it is non-magnetic, it is widely used for parts in precision machinery and similar applications.
We also handle other non-ferrous metals.
Truck Bed
Used for truck bed containers.
Inverter Pipe
Used for cooling components that run through vehicle engines.
Joint
Used as metal fittings to connect pipes, machinery, and similar equipment.
- Aluminum & Non-Ferrous Metals
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Category Materials Handled Aluminum Pure Aluminum Series A1050, A1060, A1070, and A1100
Al-Mn Series A3003
Al-Mg Series A5052
Al-Mg-Si Series A6061Non-Ferrous Metals Titanium
Copper and Brass
Zinc
Electrolytic Nickel
- Main Suppliers
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- NIPPON STEEL CORPORATION
- JFE Steel Corporation
- Kobe Steel, Ltd.
- NIPPON STEEL Stainless Steel Corporation
- NIPPON KINZOKU CO., LTD.
- POSCO
- Daido Steel Co., Ltd.
- TAKASAGO TEKKO K.K.
- Namitei Co., Ltd.
- NICHIA STEEL WORKS, LTD.
- OSAKA HEAT-TREATMENT CO., LTD.
- HAYASHIO STEEL CO., LTD.
- UACJ Corporation
- Nippon Light Metal Company, Ltd.
- ALMINE Co., LTD.
- Proterial Metals, Ltd.
- MA Aluminum Corporation
- Honda Metal Industries Vietnam, Ltd.
- Yasuda Metal Industries, Ltd.
- KATAGI ALUMINUM PRODUCTS LTD.
