CF 8 Stainless Steel Castings

CF 8 Stainless Steel Castings

CF3 CF3M CF8 CF8M Stainless Steel Castings Supplier Product Description and Process CF3 CF3M CF8 CF8M Stainless Steel Castings Supplier Production process: lost wax (silica sol) investment castings Weight range: from 10 grams to 30 kilograms Surface treatment process: passivation treatment...

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CF3 CF3M CF8 CF8M Stainless Steel Castings Supplier

Product Description and Process

CF3 CF3M CF8 CF8M Stainless Steel Castings Supplier

Production process: lost wax (silica sol) investment castings

Weight range: from 10 grams to 30 kilograms

Surface treatment process: passivation treatment

Machining process: CNC machine, machining center, lathe, mill machine, drill machine, etc.


Product Material and Uses

Normally produce with ASTM A743/A743M Grade CF8, CF8M, CF3, CF3M, ZG0Cr18Ni10, ZG0Cr18Ni9, ZG0Cr18Ni9Ti, ZG0Cr18Ni12Mo2Ti, ZG1Cr18Ni12Mo2Ti, etc.

The stainless steel casting products are widely used for auto-car components, Machinery & Pump Parts, Marine Parts, valve parts, pipe parts, etc.


304 Stainless Steel versus 316 Stainless Steel

Corrosion resistance of stainless steel varies by grade

Judging by the name, you might assume that stainless steel never stains—but you’d be wrong.

Stainless steel stains less easily than other iron-based metals, but it’s not literally “stainless”. Just like standard steel, stainless can get marked up by fingerprints and grease, develop discoloration, and eventually rust. The difference is resilience. Stainless steel can withstand much more time and abuse before showing signs of wear.

All steels have the same basic iron and carbon composition, but stainless steel also contains a healthy dose of chromium—the alloy that gives stainless steel its famous corrosion resistance.

And this is where things get complicated. There are multiple grades under the stainless steel umbrella, each with slightly different alloy composition, and therefore slightly different physical characteristics.

Stainless steel must contain at least 10.5 percent chromium. Depending on the grade, it may contain much higher chromium levels, and additional alloying ingredients like molybdenum, nickel, titanium, aluminum, copper, nitrogen, phosphorous and selenium.

The two most common stainless steel grades are 304 and 316. The key difference is the addition of molybdenum, an alloy which drastically enhances corrosion resistance, especially for more saline or chloride-exposed environments. 316 stainless steel contains molybdenum, but 304 doesn’t.

For outdoor furnishings like rails and bollards, stainless steel is an ideal corrosion-resistant material, but it will only withstand long-term exposure if the grade is appropriate for its environment. 304 is an economical and practical choice for most environments, but it doesn’t have the chloride resistance of 316. The slightly higher price point of 316 is well worth it in areas with high chloride exposure, especially the coast and heavily salted roadways. Each application for stainless steel has its own unique demands, and needs a stainless steel that’s up to the task.


Natural corrosion resistance

Corrosion is a natural phenomenon. Pure elements always react with the surrounding environment, which is why so few elements are naturally found in their pure form.

Iron is no exception.

In wet or humid conditions iron reacts with the oxygen contained in water to form iron oxide, also known as rust. The red flaky oxide deteriorates easily—exposing more material to corrosion. Iron and standard carbon steels are highly susceptible to this type of corrosion.

Stainless steel has the innate ability to form a passive layer that prevents corrosion. The secret?

Chromium.

The chromium found in all stainless steels reacts quickly with oxygen environments, much the same as iron. The difference, however, is that only a very fine layer of chromium will oxidize (often only a few molecules in thickness). Unlike flaky and unstable iron oxide, chromium oxide is highly durable and non-reactive. It adheres to stainless steel surfaces and won't transfer or react further with other materials. It is also self-renewing—if it’s removed or damaged, more chromium will react with oxygen to replenish the barrier. The higher the chromium content, the faster the barrier repairs itself.

Once oxidized, or passivized, stainless steel typically rusts at a very low rate of less than 0.002 inches per year. When kept in its best condition, stainless steel offers clean and bright surfaces ideal for many building and landscape designs.


The latest Stainless Steel Material Grade Standard Contrast

China GB

Japan JIS

America

Korea KS

EU BS EN

Australia AS

Old Grade

New Grade

ASTM

UNS

Austenitic stainless steel

1Cr17Mn6Ni5N

12Cr17Mn6Ni5N

SUS201

201

S20100

STS201

1.4372

201-2

1Cr18Mn8Ni5N

12Cr18Mn9Ni5N

SUS202

202

S20200

STS202

1.4373

-

1Cr17Ni7

12Cr17Ni7

SUS301

301

S30100

STS301

1.4319

301

0Cr18Ni9

06Cr19Ni10

SUS304

304

S30400

STS304

1.4301

304

00Cr19Ni10

022Cr19Ni10

SUS304L

304L

S30403

STS304L

1.4306

304L

0Cr19Ni9N

06Cr19Ni10N

SUS304N1

304N

S30451

STS304N1

1.4315

304N1

0Cr19Ni10NbN

06Cr19Ni9NbN

SUS304N2

XM21

S30452

STS304N2

-

304N2

00Cr18Ni10N

022Cr19Ni10N

SUS304LN

304LN

S30453

STS304LN

-

304LN

1Cr18Ni12

10Cr18Ni12

SUS305

305

S30500

STS305

1.4303

305

0Cr23Ni13

06Cr23Ni13

SUS309S

309S

S30908

STS309S

1.4833

309S

0Cr25Ni20

06Cr25Ni20

SUS310S

310S

S31008

STS310S

1.4845

310S

0Cr17Ni12Mo2

06Cr17Ni12Mo2

SUS316

316

S31600

STS316

1.4401

316

0Cr18Ni12Mo3Ti

06Cr17Ni12Mo2Ti

SUS316Ti

316Ti

S31635

-

1.4571

316Ti

00Cr17Ni14Mo2

022Cr17Ni12Mo2

SUS316L

316L

S31603

STS316L

1.4404

316L

0Cr17Ni12Mo2N

06Cr17Ni12Mo2N

SUS316N

316N

S31651

STS316N

-

316N

00Cr17Ni13Mo2N

022Cr17Ni13Mo2N

SUS316LN

316LN

S31653

STS316LN

1.4429

316LN

0Cr18Ni12Mo2Cu2

06Cr18Ni12Mo2Cu2

SUS316J1

-

-

STS316J1

-

316J1

00Cr18Ni14Mo2Cu2

022Cr18Ni14Mo2Cu2

SUS316J1L

-

-

STS316J1L

-

-

0Cr19Ni13Mo3

06Cr19Ni13Mo3

SUS317

317

S31700

STS317

-

317

00Cr19Ni13Mo3

022Cr19Ni13Mo3

SUS317L

317L

S31703

STS317L

1.4438

317L

0Cr18Ni10Ti

06Cr18Ni11Ti

SUS321

321

S32100

STS321

1.4541

321

0Cr18Ni11Nb

06Cr18Ni11Nb

SUS347

347

S34700

STS347

1.455

347

Austenitic -ferrite stainless steel (duplex stainless steel)

0Cr26Ni5Mo2

-

SUS329J1

329

S32900

STS329J1

1.4477

329J1

00Cr18Ni5Mo3Si2

022Cr19Ni5Mo3Si2N

SUS329J3L

-

S31803

STS329J3L

1.4462

329J3L

Ferrite stainless steel

0Cr13Al

06Cr13Al

SUS405

405

S40500

STS405

1.4002

405

-

022Cr11Ti

SUS409

409

S40900

STS409

1.4512

409L

00Cr12

022Cr12

SUS410L

-

-

STS410L

-

410L

1Cr17

10Cr17

SUS430

430

S43000

STS430

1.4016

430

1Cr17Mo

10Cr17Mo

SUS434

434

S43400

STS434

1.4113

434

-

022Cr18NbTi

-

-

S43940

-

1.4509

439

00Cr18mo2

019Cr19Mo2NbTi

SUS444

444

S44400

STS444

1.4521

444

Martensitic stainless steel

1Cr12

12Cr12

SUS403

403

S40300

STS403

-

403

1Cr13

12Cr13

SUS410

410

S41000

STS410

1.4006

410

2Cr13

20Cr13

SUS420J1

420

S42000

STS420J1

1.4021

420

3Cr13

30Cr13

SUS420J2

-

-

STS420J2

1.4028

420J2

7Cr17

68Cr17

SUS440A

440A

S44002

STS440A

-

440A


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