SUS632J1 (15-7PH) | PH Stainless Steel for Springs

Name: SUS632J1 (15-7PH) | PH Stainless Steel for Springs
Brand: TOKUSHU KINZOKU EXCEL CO., LTD.

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MOQ : 100 Kilograms

About SUS632J1 (15-7PH) | PH Stainless Steel for Springs

Property	Value
Grade	SUS632J1 (15-7PH)
Reference Standards (For Reference Only)	JIS SUS632J1 (G4313, G4305)
Available Shapes	Coil, Sheet
Manufacturable Thickness Range (Strip, Sheet)	0.030–2.0 mm
Manufacturable Width Range (Strip, Sheet)	3.0–300 mm
Length	Strip or Sheet (Length less than 2,000 mm)
Technique	Cold Rolled
Temper	BA (Bright Annealed), 2B (Skin Passed), As Rolled (1/2H, 3/4H)
Surface Finish	Bright, Dull
Examples of Applications	Steel Belts, Bandsaws, Mask Frame Springs, Vibration Motors/Haptics, Springs
Coil I.D.	300, 400, 512 mm
Chemical Composition	Refer to the image
Mechanical Properties	Refer to the image
Density	7.74 g/cm³
Specific Heat	502 J/(kg·K)
Electrical Resistivity	100 μΩ·cm
Young's Modulus	196 GPa
Thermal Expansion	10.9 × 10^-6/K (0–100°C)
Thermal Conductivity	15.9 W/(m·K) (100°C)
Melting Range	Refer to specification
Magnetism	Strong Magnetic
Minimum Order Quantity	100 Kilograms
Country of Origin	Japan, China, Taiwan
Payment Terms	Telegraphic Transfer (T/T)
Delivery Terms	EXW, FOB, CIF, DAP, etc.
Packing	Our Standard Packing for Export
Export Markets	Asia, Middle East, North America, South America, Europe, etc.
Description	SUS632J1 (15-7PH) is a precipitation-hardening stainless steel designed to provide high strength, good toughness, and simplified heat-treatment processing compared with SUS631 (17-7PH). Unlike SUS631, which requires both martensitic transformation and precipitation-hardening treatments to achieve maximum strength, SUS632J1 remains in a martensitic structure regardless of whether it is solution treated. Therefore, high strength can be achieved with only a single precipitation-hardening heat treatment. SUS632J1 is available in both solution heat-treated and cold-rolled conditions. Cold-rolled material offers higher strength, although its maximum achievable strength is generally lower than that of SUS631. Due to its martensitic structure, this grade exhibits strong magnetic properties in all conditions. Even in the solution-treated state, the low carbon content provides excellent toughness and allows moderate forming operations. Main Features: Simplified Heat Treatment Process Requires only precipitation hardening to develop high strength, reducing processing complexity compared with SUS631. Strong Magnetism Maintains strong magnetic properties in both solution-treated and hardened conditions. Good Toughness and Formability Low carbon content provides toughness and allows light forming operations even in the martensitic condition. Excellent Spring Performance Suitable for precision spring applications requiring high strength and fatigue resistance. Good Weldability Characteristics Minimal strength variation in welded areas makes it suitable for applications involving welding, such as steel belts. High Strength and Corrosion Resistance Combines precipitation-hardening capability with stainless steel corrosion resistance for demanding industrial applications. SUS632J1 is commonly used for steel belts, bandsaws, mask frame springs, vibration motor components, precision springs, and welded assemblies requiring a combination of strength, toughness, and dimensional stability. TOKKIN supplies a variety of spring stainless steel materials in accordance with JIS G4313 and related specifications.