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AS2074 Cast Steel

Originated as AS B27 - 1931 and AS E7 - 1938. After consultation with stakeholders in both countries, Standards Australia and Standards New Zealand decided to develop this Standard as an Australian, rather than an Australian/New Zealand Standard. 

The objective of this Standard is to specify the steel specifications, heat treatment and test requirements for cast steels. 

AS 2074 - 1982 specified additional requirements, including fettling and dressing, freedom from defects, rectification of defects and certification. These additional requirements are now specified in AS 4738. This edition of the Standard is a standard of materials. 

This Standard specifies requirements for carbon, low alloy and high alloy cast steels. 

Grade

Chemical Composition %

Tensile Strength

Yi
eld

Elon
gation
%

C

Si

Mn

S

P

Cr

Mo

Ni

Other

min

max

min

max

min

max

max

max

min

max

min

max

min

max

max / range

min

max

min

min

AS2074/C1

0.1

0.18

-

0.60

0.60

1.00

0.050

0.050

-

-

-

-

-

-

-

490

-

-

12

AS2074/C2

-

0.15

-

0.60

-

0.50

0.050

0.050

-

-

-

-

-

-

-

340

430

-

17

AS2074/C3

-

0.25

-

0.60

-

0.90

0.060

0.060

-

-

-

-

-

-

-

430

-

230

17

AS2074/C4-1

-

0.30

-

0.60

-

1.00

0.060

0.060

-

-

-

-

-

-

-

460

-

245

21

AS2074/C4-2

-

0.35

-

0.60

-

1.00

0.060

0.060

-

-

-

-

-

-

-

490

-

265

15

AS2074/C5

-

0.45

-

0.60

-

1.00

0.060

0.060

-

-

-

-

-

-

-

540

-

295

11

AS2074/C6

0.40

0.50

-

0.60

-

1.00

0.050

0.050

-

-

-

-

-

-

-

620

-

325

8

AS2074/C7A-1

-

0.25

-

0.60

-

0.90

0.050

0.050

-

-

-

-

-

-

-

430

-

230

22

AS2074/C7A-2

-

0.30

-

0.60

-

0.90

0.050

0.050

-

-

-

-

-

-

-

480

-

245

20

AS2074/C7A-3

-

0.35

-

0.60

-

1.10

0.050

0.050

-

-

-

-

-

-

-

540

-

280

13

AS2074/L1A

0.18

0.25

-

0.60

1.20

1.60

0.050

0.050

-

-

-

-

-

-

-

540

-

340

13

AS2074/L1B

0.25

0.33

-

0.60

1.20

1.60

0.050

0.050

-

-

-

-

-

-

-

620

-

370

11

AS2074/L2A

0.45

0.55

-

0.75

0.50

1.00

0.060

0.060

0.80

1.20

-

-

-

-

A1 0.06

-

-

-

-

AS2074/L2B

0.55

0.65

-

0.75

0.50

1.00

0.060

0.060

0.80

1.50

0.20

0.40

-

-

A1 0.06

-

-

-

-

AS2074/L2C

0.70

0.90

-

0.75

0.50

1.20

0.060

0.060

1.30

2.40

0.20

0.40

-

-

-

-

-

-

-

AS2074/L3A

-

0.12

-

0.60

-

0.80

0.030

0.030

-

-

-

-

3.00

4.00

-

460

-

280

20

AS2074/L4A

0.10

0.18

-

0.60

0.30

0.60

0.040

0.040

-

-

-

-

2.75

3.50

A1 0.06

700

-

-

11

AS2074/L5A-1

-

0.25

0.20

0.50

0.50

1.00

0.050

0.050

-

-

0.40

0.70

-

-

-

460

-

280

15

AS2074/L5A-2

-

0.20

0.20

0.60

0.50

1.00

0.040

0.040

-

-

0.45

0.65

-

-

-

460

-

260

18

AS2074/L5B-1

-

0.20

-

0.60

0.50

0.80

0.050

0.050

1.00

1.50

0.45

0.65

-

-

-

480

-

280

17

AS2074/L5B-2

-

0.20

-

0.60

0.50

0.80

0.050

0.015

1.00

1.50

0.45

0.65

-

-

A1 0.01

480

-

280

17

AS2074/L5C

-

0.18

-

0.60

0.40

0.70

0.050

0.050

2.00

2.75

0.90

1.20

-

-

-

540

-

325

17

AS2074/L5D

-

0.25

-

0.75

0.30

0.70

0.040

0.040

2.50

3.50

0.35

0.60

-

-

-

620

770

370

13

AS2074/L5E

-

0.20

-

0.75

0.40

0.70

0.040

0.040

4.00

6.00

0.45

0.65

-

-

-

620

-

420

13

AS2074/L5F

-

0.20

-

0.60

0.50

0.80

0.050

0.050

4.00

1.50

0.90

1.20

-

-

V 0.15-0.25

650

-

415

11

AS2074/L5G

-

0.15

-

0.50

0.40

0.80

0.050

0.050

1.00

1.00

0.70

1.00

-

-

V 0.22-0.35

540

-

310

17

AS2074/L5H

0.10

0.15

-

0.45

0.40

0.70

0.030

0.030

0.70

0.50

0.40

0.60

-

-

V 0.22-0.30

510

-

295

17

AS2074/L6

-

0.35

-

-

-

-

0.050

0.050

0.30

-

-

-

-

-

-

620

-

415

19

AS2074/L6A-1

-

-

-

-

-

-

0.050

0.050

-

-

-

-

-

-

A1 0.06

700

850

495

11

AS2074/L6A-2

-

-

-

-

-

-

0.050

0.050

-

-

-

-

-

-

A1 0.06

750

-

585

15

AS2074/L6B-1

-

-

-

-

-

-

0.040

0.040

-

-

-

-

-

-

A1 0.06

850

1000

590

8

AS2074/L6B-2

-

-

-

-

-

-

0.040

0.040

-

-

-

-

-

-

A1 0.06

825

-

690

12

AS2074/L6C

-

-

-

-

-

-

0.030

0.030

-

-

-

-

-

-

A1 0.06

1000

1160

695

6

AS2074/H1A

1.0

1.35

-

1.00

11.00

-

0.10

-

-

-

-

-

-

-

-

-

-

-

-

AS2074/H1B

1.0

1.35

-

1.00

11.00

-

0.10

-

1.50

2.50

-

-

-

-

-

-

-

-

-

AS2074/H1C

1.0

1.35

-

1.00

11.00

-

0.10

-

-

-

0.90

1.20

-

-

-

-

-

-

-

AS2074/H1D

1.3

1.50

-

1.00

17.0

-

0.10

-

-

-

-

-

-

-

-

-

-

-

-

AS2074/H2A

-

0.20

-

1.00

0.30

0.70

0.040

0.040

8.0

10.0

0.90

1.20

-

-

-

620

-

415

13

AS2074/H3A

-

0.15

-

1.00

-

1.00

0.040

0.040

11.5

13.5

-

-

-

1.00

-

540

-

370

15

AS2074/H3B

-

0.20

-

1.00

-

1.00

0.040

0.040

11.5

13.5

-

-

 

1.00

-

700

-

465

11

AS2074/H3C

-

0.10

-

1.00

-

1.00

0.040

0.040

11.5

13.5

-

0.60

3.40

4.20

-

770

-

620

12

AS2074/H3D

-

0.06

-

1.00

-

1.00

0.040

0.030

11.5

14.0

0.40

1.00

3.50

4.50

-

755

-

550

15

AS2074/H4A

-

0.50

-

2.00

-

1.00

0.040

0.040

26.0

30.0

-

0.50

-

4.00

-

-

-

-

-

AS2074/H5A

-

0.08

-

1.50

-

2.00

0.040

0.040

17.0

21.0

-

-

8.0

-

-

480

-

200

20

AS2074/H5B

-

0.12

-

1.50

-

2.00

0.040

0.040

17.0

21.0

-

-

8.0

-

-

480

-

200

20

AS2074/H5C

-

0.08

-

1.50

-

2.00

0.040

0.040

17.0

21.0

-

-

8.5

-

Nb 8×C-1.0(max)

480

-

200

20

AS2074/H6A

 

0.08

-

1.50

-

2.00

0.040

0.040

18.0

20.0

3.00

4.00

10.0

-

-

480

-

200

20

AS2074/H6B

 

0.08

-

1.50

-

2.00

0.040

0.040

18.0

20.0

2.00

3.00

10.0

-

-

480

-

200

20

AS2074/H6C

 

0.08

-

1.50

-

2.00

0.040

0.040

17.00

20.0

2.00

3.00

10.0

-

Nb 8× C-1.0(max)

480

-

200

15

AS2074/H6D

-

0.03

-

1.50

-

2.00

0.040

0.040

17.0

21.0

2.00

3.00

9.0

13.0

-

430

-

210

26

AS2074/H6E

-

0.25

-

1.00

-

1.20

0.045

0.010

19.5

20.5

6.00

7.00

17.5

19.5

-

550

-

260

30

AS2074/H7A

-

0.07

-

1.00

-

0.70

0.035

0.030

15.5

17.7

-

-

3.6

4.6

Cu 2.50~3.20

-

-

-

-

AS2074/H7B

-

0.07

-

1.00

-

0.70

0.035

0.030

14.4

15.5

-

-

4.5

5.5

Cu 2.50~3.20

-

-

-

-

AS2074/H8A

-

0.20

-

2.00

-

2.00

0.040

0.040

22.0

27.0

-

-

10.0

14.0

-

480

-

200

20

AS2074/H8B

0.20

0.45

-

1.50

-

2.50

0.040

0.040

24.0

28.0

-

0.50

11.0

14.0

N 0.20

560

-

-

3

AS2074/H8C

-

0.50

-

2.50

-

2.00

0.060

0.060

22.0

27.0

-

1.00

10.0

14.0

-

-

-

-

-

AS2074/H8E-1

-

0.20

-

1.50

-

2.00

0.040

0.040

24.0

27.0

-

0.5

19.0

22.0

-

450

-

200

20

NOTES:

1. Advice and recommendations on information for optional test requirements to be supplied by the purchaser at the time of enquiry or order are contained in Appendix A.

2. A summary of chemical composition and tensile properties of steels included in this Standard is given in Appendix B, which also provides guidance on the selection of grades for specific applications.

3. AS 2074 only specifies materials. AS 4738 specifies the other additional requirements of the casting.

The following sheet is the comparison of materials between AS2074 and BS3100. As for the specific chemical components, please refer to the link of BS3100 Standard. 

CARBON AND ALLOY STEEL CASTINGS 

AS2074

ASTM

BS

C1

 

BS3100 AW1

C2

-

BS3100 AM1, AM2

C3

A27 N-1

BS3100 A1

C4-1

A27 65-35

-

C4-2

A27 70-36

BS3100 A2

C5

-

BS3100 A3

C6

-

BS3100 AW2

C7A-1
C7A-2
C7A-3

A214 WCA
A214 WCB
A214 WCB

BS1504 430
BS1504 480
BS1504 540

L1A
L1B

-
-

BS3100 A4
BS3100 A5, A6

L2A
L2B

-
-

BS3100 BW2, BW3
BS3100 BW4

L3A

A352 LC2

BS3100 BL2

L4A

-

-

L5A-1
L5A-2

A217 WC1
A356-2

BS3100 B1

L5B

A217 WC6, W11

BS3100 B2

L5C

A217 WC9
A356-10

BS3100 B3

L5D

 

BS3100 B4

L5E

-

BS3100 B5

L5F

-

BS3100 B6

L5G

-

-

L5H

-

BS3100 B7

L6

A148 90-60

-

L6A-1
L6A-2


A148 105-85


BS3100 BT1

L6B-1
L6B-2
L6C


A148 115-95
A148 150-135


BS3100 BT2
BS3100 BT3

 

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