SUS632J1 (15-7PH) | Precipitation Hardening Stainless Steel｜TOKUSHU KINZOKU EXCEL CO., LTD.(TOKKIN)

Stainless Steels

Precipitation Hardening

SUS632J1 (15-7PH) | Precipitation Hardening Stainless Steel

Overview & Features

The solution heat-treated state (austenite phase) of SUS631 is soft and can be processed in various ways, but requires two or more heat treatments of martensitization and precipitation hardening to increase its strength.
Because SUS632J1 is always in martensitic phase with or without solution treatment, it can be strengthened with only one precipitation hardening heat treatment.
Solution heat-treated or cold rolled finish can be selected, Rolling finish provides higher strength, but not as high as that of SUS631.This steel grade exhibits strong magnetism in all states.
Solution heat-treated materials, although a martensitic phase, can be lightly processed because of to its low carbon content and toughness.
Also, because there is little variation in strength at welded portion, it is sometimes used in applications where welding is involved, such as steel belts.

TOKKIN supplies a variety of stainless steels for springs as specified in JIS G4313.
Please refer to this page for the features and comparison of each grade of stainless steel for springs.

Examples of Applications

Steel Belt, Bandsaws, Mask Frame Springs, Vibration Motors/Haptics, Springs

Available Shapes

Manufacturable Range (COIL, SHEET)

Thickness

0.030-2.0mm

Width

3.0-300mm

Length

COIL or SHEET less than 2000mm

This is the manufacturing range of coils and sheets we manufacture.

Standard

Chemical Composition

Physical Properties

Mechanical Properties

Heat Treatment

Related Pages

Standards

We manufacture in accordance with JIS G4313 standards.

JIS

SUS632J1 (G4313, G4305)

Chemical Composition

Physical Properties

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℃）

Thermal Conductivity

15.9 W/(m・K) (100℃)

Magnetism

Strong

Mechanical Properties

Unless otherwise specified, we manufacture in accordance with JIS standards (see table below), but you can also specify stricter standards or custom specifications.

Heat Treatment

Age hardening(Precipitation Hardening) can be performed on SUS632J1.
Regardless of temper, precipitation hardening should be perform at 480℃ for 1 hour.
Please see the figure below for mechanical properties resulting from heat treatment .

Related Pages

Stainless Steels for Springs

This materials are possible to increase their hardness by rolling, they can be used as spring parts.

Learn More

Precipitation Hardening Stainless Steels

These grades were developed with the concept of steels that are easy to form like austenitic stainless steels, and provide high strength like that of martensitic stainless steels.

Learn More

Stainless Steels Foils (Under t0.10mm)

We offer not only thin stainless steel foils, but also propose the appropriate steel grade and temper depending on specific application and use requirements, such as strength, workablility, magnetism, and corrosion resistance.

Learn More

Related Products

SUS631 (17-7PH) | Precipitation Hardening Stainless Steel

SUS631 is the most typical precipitation hardening type steel that can be heat treated to increase hardness while retaining the excellent performance of 18-8 stainless steel.
From the softest solution-treated to the hardest full hard rolled, depending on the processing and application, it is possible to have a strength second only to high-carbon martensitic quenched materials by applying various heat treatments.
In the solution heat-treated state, more than 30% elongation allows for strong processing such as drawing.
Please note that the material is weakly magnetic in the solution heat-treated state, but becomes quite strongly magnetic after precipitation hardening treatment.

This material is hard to obtain due to its relatively small distribution volume, and most of the materials distributed in stock sales are 3/4H finish. However, we can provide from the softest material in solution heat-treated condition (A material) to the hardest material with full hard finish (EH) per your use and processing method in small lot.

TOKKIN supplies a variety of stainless steels for springs as specified in JIS G4313.
Please refer to this page for the features and comparison of each grade of stainless steel for springs.

Learn More

TOKKIN™ 350 | Precipitation Hardening Stainless Steel

TOKKIN™ 350 is a Cr-Ni-Mo stainless steel. In solution heat-treated and annealed conditions, it boasts excellent workability and high strength by heat treatment.
Compared to other precipitation hardening stainless steels, the addition of Molybdenum provides superior corrosion resistance and oxidation resistance, and the absence of Aluminum and Titanium provides good weldability. It also has excellent yield strength and cyclic fatigue strength, and is used for bellows, diaphragms, actuation valves, etc. which require long life under cyclic stress.

Learn More