JIS G4313 SUS420J2-CSP Cold Rolled Stainless Steel Strip for Springs

Grade : SUS420J2 Classification: Corrosion-resisting / heat-resisting steel Martensitic steel

Standards:

JIS G 4304 : Hot-rolled stainless steel plate, sheet and strip

JIS G 4305 : Cold-rolled stainless steel plate, sheet and strip

Dimensions and tolerances
Thickness: 0.01 to 5 mm; Tolerances: +/- 0.008 to 0.11 mm
Width: 5 to 1219 mm; Tolerances: +/- 0.15 to 0.60
*accept nonstandard size, please contact with our sales.

Our Advantage
1. Precise thickness, uniform hardness. Bright surface, smooth edge.
2. High flatness of board surface, high performance after multiple bending.
3. No cracking after stamping, and the quality is stable. And we provide Self-Inspection Reports and Raw-Material Test Certificates.
4. Professional anti-rust protective packaging. On time delivery, competitive price.
5. Large stock available, no MOQ requirement

SUS420J2-CSP Stainless Steel Strip Chemical compositions

SUS420J2-CSP Stainless Steel Strip Mechanical properties

SUS420J2-CSP Stainless Steel Strip Appearance

The surface of strip shall be well finished and free from defects detrimental to practical use; however, those supplied in coiled-state may inevitably contain some abnormal portions since processing of strip generally does not allow opportunity for defects

removal.

SUS420J2-CSP Stainless Steel Strip Marking

The strips having been passed the inspection shall be legibly marked on each bundle (package) with the following items. A part of items may be omitted upon the agreement between the purchaser and the manufacturer.

a) Symbol of grade

b) Symbol of temper

c) Dimensions

d) Symbol of tolerance (that according to tolerance symbol of thickness ET or ST shall be marked)

e) Serial number or inspection number

f) Manufacturer's name or its abbreviation

the stainless steel strip mainly used for flat springs and spiral springs. Further, this Standard applies to the cut-to-length which is cut from the strip.

SUS420J2-CSP Stainless Steel Strip Manufacturing method

The strips shall be manufactured by cold rolling. After cold rolling, SUS420J2-CSP-0 shall be subjected to the annealing, and SUS631-CSP-0 shall be subjected to the solution treatment.

SUS420J2-CSP Stainless Steel Strip Inspection and testing

a suitable frequency of verification of the dimensions of the products;

an adequate intensity of visual examination of the surface quality of the products;

an appropriate frequency and type of test to ensure that the correct grade of steel is used.

Extent of testing

Tensile and bending tests

Tolerances on shape

For over 20 years, Fushun Steel, have been dedicated to manufacturing high-quality spring steel wire. Our stable quality and superior technique are the foundations of our success, and we pride ourselves on delivering products that meet or exceed our customers' expectations. With a focus on innovation and efficiency, we utilize the latest technologies to ensure consistent quality and timely delivery.

We have more than 400 employees and our plant covers an area of nearly 15,000 square meters, with an annual output of 100,000 tons. Our advanced equipment allows us to produce high-quality spring steel products efficiently, meeting the needs of our customers.

In the production of spring steel wire, a variety of specialized equipment is essential. Shot Peening Machine. Wire Drawing Machine. Phosphating Equipment. Annealing Furnace. Polishing Equipment. Wire Coiling Machine. End Grinding Machine. Tensile and Compression Testing Machine.

Our commitment to excellence and reliability has resulted in long-standing partnerships with some of the biggest names in the industry. Like MW Industries, NHK Spring, Scherdel, Sogefi, Mubea etc. We also have established partnerships with several prominent Chinese steel groups, like Baowusteel, Xinyusteel, Nanjinsteel, Shagang etc.

Our spring steel wire comes in various categories such as music wire, hard drawn wire, oil tempered wire, chrome silicon wire, chrome vanadium wire, stainless steel wire, nickel plated wire, phosphate coated wire, galvanized wire, and copper coated wire.

Spring steel wire is a versatile material that is utilized in the manufacture of a wide array of products. including automotive suspension springs, valve springs, and torsion springs. Beyond springs, paper clips and mattress supports. In addition, spring steel wire is essential in the creation of retaining rings and circlips that are utilized to secure components on shafts or within bores, and in making various types of fasteners. The durability and resilience of spring steel wire also make it a key material in the manufacturing of certain types of cable, fencing, and even some musical instruments, such as piano and guitar strings, where its ability to return to its original shape after deformation is highly valued.