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Material Composition is the Key to Customized Precision Castings

Update On Nov 17.2022

material composition is the key to customized precision castings

Many of our customers are often confused by the material grades on the drawings when they are given drawings of the parts they need to purchase. For example, customers who need to purchase silicone casting parts are usually European and American customers, and most of the drawings of European customers are marked with material grades such as 1.4308, 1.4408, etc. For those who are in contact with such material grades for the first time, they can only seek help by using search sites such as Google.

The chart below shows a rough cross-reference of stainless steel grades, but it is not very accurate.

 

Stainless Steel Grades Around The World

No

China GB

USA

Japan

JIS

EU BS EN

Korea

KS

 

Old

New(07.10)

ASTM

UNS

 

 

 

1

1Cr17Mn6Ni5N

12Cr17Mn6Ni5N

201

S20100

SUS201

1.4372

STS201

2

1Cr18Mn8Ni5N

12Cr18Mn9Ni5N

202

S20200

SUS202

1.4373

STS202

3

1Cr17Ni7

12Cr17Ni7

301

S30100

SUS301

1.4319

STS301

4

0Cr18Ni9

06Cr19Ni10

304

S30400

SUS304

1.4301

STS304

5

00Cr19Ni10

022Cr19Ni10

304L

S30403

SUS304L

1.4306

STS304L

6

0Cr19Ni9N

06Cr19Ni10N

304N

S30451

SUS304N1

1.4315

STS304N1

7

0Cr19Ni10NbN

06Cr19Ni9NbN

XM21

S30452

SUS304N2

-

STS304N2

8

00Cr18Ni10N

022Cr19Ni10N

304LN

S30453

SUS304LN

-

STS304LN

9

1Cr18Ni12

10Cr18Ni12

305

S30500

SUS305

1.4303

STS305

10

0Cr23Ni13

06Cr23Ni13

309S

S30908

SUS309S

1.4833

STS309S

11

0Cr25Ni20

06Cr25Ni20

310S

S31008

SUS310S

1.4845

STS310S

12

0Cr17Ni12Mo2

06Cr17Ni12Mo2

316

S31600

SUS316

1.4401

STS316

13

0Cr18Ni12Mo3Ti

06Cr17Ni12Mo2Ti

316Ti

S31635

SUS316Ti 

1.4571

-

14

00Cr17Ni14Mo2

022Cr17Ni12Mo2

316L

S31603

SUS316L

1.4404

STS316L

15

0Cr17Ni12Mo2N

06Cr17Ni12Mo2N

316N

S31651

SUS316N

-

STS316N

16

00Cr17Ni13Mo2N

022Cr17Ni13Mo2N

316LN

S31653

SUS316LN

1.4429

STS316LN

17

0Cr18Ni12Mo2Cu2

06Cr18Ni12Mo2Cu2

-

-

SUS316J1

-

STS316J1

18

00Cr18Ni14Mo2Cu2

022Cr18Ni14Mo2Cu2

-

-

SUS316J1L

-

STS316J1L

19

0Cr19Ni13Mo3

06Cr19Ni13Mo3

317

S31700

SUS317

-

STS317

20

00Cr19Ni13Mo3

022Cr19Ni13Mo3

317L

S31703

SUS317L

1.4438

STS317L

21

0Cr18Ni10Ti

06Cr18Ni11Ti

321

S32100

SUS321

1.4541

STS321

22

0Cr18Ni11Nb

06Cr18Ni11Nb

347

S34700

SUS347

1.4550

STS347

23

0Cr26Ni5Mo2

-

329

S32900

SUS329J1

1.4477

STS329J1

24

00Cr18Ni5Mo3Si2

022Cr19Ni5Mo3Si2N

-

S31803

SUS329J3L

1.4462

STS329J3L

25

0Crl3Al

06Crl3Al

405

S40500

SUS405

1.4002

STS405

26

-

022Cr11Ti

409

S40900

SUH409

1.4512

STS409

27

00Cr12

022Cr12

-

-

SUS410L

-

STS410L

28

1Cr17

10Cr17

430

S43000

SUS430

1.4016

STS430

29

1Cr17Mo

10Cr17Mo

434

S43400

SUS434

1.4113

STS434

30

-

022Cr18NbTi

-

S43940

-

1.4509

-

31

00Cr18Mo2

019Cr19Mo2NbTi

444

S44400

SUS444

1.4521

STS444

32

1Cr12

12Cr12

403

S40300

SUS403

-

STS403

33

1Cr13

12Cr13

410

S41000

SUS410

1.4006

STS410

34

2Cr13

20Cr13

420

S42000

SUS420J1

1.4021

STS420J1

35

3Cr13

30Cr13

-

-

SUS420J2

1.4028

STS420J2

36

7Cr17

68Cr17

440A

S44002

SUS440A

-

STS440A

 

Drawing on the premise of the table above, we still ask customers to double-check the specific grade of the product, as well as the chemical composition.

For example, the American Standard 304 American National Standard ASTM A312, 

the standard chemical composition is as follows.

C ≤ 0.08 Si ≤ 1.0 Mn ≤ 2.0 Cr18.00-20.00 Ni8.00-12.00 S ≤ 0.030 P ≤ 0.045

While 304 corresponds to the EU BSEN standard 1.4301, 

the standard chemical composition is as follows.

C≤0.07 Si≤1.0 Mn≤2.0 Cr17.50-19.50 Ni8.00-10.50 S≤0.015 P≤0.045 N≤0.11

The requirements of the four elements C, Cr, S, and N are still slightly different.

 

Therefore, whether it is our sales staff, or the customer's procurement staff, in the encounter of different countries of material grades, or need to confirm each other specific chemical composition, so as to avoid later sample development and mass production of material quality problems, after all, casting material, that is, chemical composition, is the key to the quality of our casting plant.

 

To give another example of our recent case.

The final customer's drawing at the time of inquiry stated that the material grade was SCH13, and both we and our customer looked up the chemical composition of SCH13 on Baidu as follows.

C: 0.26-0.35, Si ≤ 1.00 Mn ≤ 1.00 Cr12.00-14.00 S ≤ 0.030 P ≤ 0.035 Ni ≤ 0.6

And after signing the mold contract and sample contract, the final SCH13 chemical composition sent to us by the customer was as follows

C: 0.20-0.50, Si≤2.00 Mn≤2.00 Cr24.00-28.00 S≤0.040 P≤0.040 Ni≤11-14, Mo≤0.50

Needless to say, with such a material gap, our offer is certainly a loss-making mess.

 

Therefore, the participants in the inquiry stage, whether it is the sales, procurement, or quotation of the technical staff, we are still very worth the time and effort, two-way confirmation of the material composition, and the end customer to confirm the material composition is also a very need to solidify the process.

We hope that the small examples in this issue will bring you some warning to avoid making the same mistakes as we did in the future.

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