Tieu Chuan Thep Vn

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TIÊU CHUẨN THÉP CỦA VIỆT NAM Quản lý chất lượng sản phẩm Các Tiêu chuẩn áp dụng 1. Thành phần hoá học và cơ tính THÀNH PHẦN HOÁ HỌC MÁC TIÊU CHUẨN THÉP

CƠ TÍNH

P

S

Giới hạn bền N/mm²

0.09 ÷ 0.15 0.25 ÷ 0.50 0.12 ÷ 0.30

≤ 0.040

≤ 0.050

-

-

0.14 ÷ 0.22 0.40 ÷ 0.65 0.12 ÷ 0.30

≤ 0.040

≤ 0.050

-

-

C

Mn

Si

Giới hạn chảy N/mm²

Thép cuôn TCVN1765-75

CT33

TCVN1651-85

(CT 2)

(TOCT380-94)

CT35

TOCT5781-82

(CT3)

JIS G 3505

SWRM10 0.08 ÷ 0.13 0.30 ÷ 0.60

-

≤ 0.050

≤ 0.050

-

-

-1987 SWRM20 0.18 ÷ 0.23 0.30 ÷ 0.60

-

≤ 0.045

≤ 0.045

-

-

≤ 0.040

≤ 0.050

372 ÷ 480

≥ 300

Thép thanh tròn trơn TCVN 1765-75 TCVN 1651-85

CT35-CI

(TOCT380-94)

(CT3-AI)

0.14 ÷ 0.22 0.40 ÷ 0.65 0.12 ÷ 0.30

(TOCT5781-82) SR235

-

-

-

≤ 0.045

≤ 0.045

380 ÷ 520

≥ 235

-1987 SR295

-

-

-

≤ 0.050

≤ 0.050

440 ÷ 600

≥ 295

JIS G 3112

BS4449:1997

Gr250

≤ 0.25

-

-

≤ 0.060

≤ 0.060

1.15YP

≥ 250

AS

Gr250

≤ 0.22

-

≤ 0.40

≤ 0.040

≤ 0.040

1.1YP

≥ 250

RB300

-

-

-

-

-

≥ 330

≥ 300

RB400

-

-

-

≤ 0.060

≤ 0.060

≥ 440

≥ 400

TCVN6285:1997

RB500

-

-

-

≤ 0.070

≤ 0.070

≥ 550

≥ 500

(ISO69352:1991)

RB400W

≤ 0.22

≤ 1.60

≤ 0.60

≤ 0.050

≤ 0.050

≥ 440

≥ 400

RB500W

≤ 0.24

≤ 1.70

≤ 0.65

≤ 0.055

≤ 0.055

≥ 550

≥ 500

CT5 (AII)

0.28 ÷ 0.37

0.50 ÷ 0.80

0.15 ÷ 0.35

≤ 0.040

≤ 0.050

≥ 490

≥ 294

0.22 ÷ 0.29

0.60 ÷ 0.90

1.20 ÷ 1.60

≤ 0.040

≤ 0.045

≥ 590

≥ 392

0.19 ÷ 0.26

1,50 ÷ 1.90

0.40 ÷ 0.70

≤ 0.045

≤ 0.045

≥ 883

≥ 590

-

-

-

≤ 0.060

≤ 0.060

≥ 500

≥ 360

≤ 0.060

≤ 0.060

≥ 620

≥ 420

≤ 0.060

≤ 0.060

≥ 690

≥ 650

Thép thanh

TOCT380-94

25T2C

TOCT5781-82

(A-III) 20XT2U (A-IV) Nhóm 40 [300]

ASTM

Nhóm 60

A615/A615M

[420] Nhóm 75 [520]

ASTM

Nhóm 60

A706/A760M

[420]

≤ 0.30

≤ 1.50

≤ 0.50

≤ 0.035

≤ 0.045

≤ 550

420 ÷ 540

BS4449:1997

Gr 460

≤ 0.25

-

-

≤ 0.050

≤ 0.050

1.05YP

≥ 460

Trang 1/2

AS1320-1991

JISG3112 -1987

≤ 0.25

-

≤ 0.40

≤ 0.040

≤ 0.040

1.1YP

≥ 400

SD 295 A

-

-

-

≤ 0.050

≤ 0.050

440 ÷ 600

≥ 295

SD 295B

≤ 0.27

≤ 1.50

≤ 0.55

≤ 0.040

≤ 0.040

≥ 440

295 ÷ 390

SD 345

≤ 0.27

≤ 1.60

≤ 0.55

≤ 0.040

≤ 0.040

≥ 490

345 ÷ 440

SD 390

≤ 0.29

≤ 1.80

≤ 0.55

≤ 0.040

≤ 0.040

≥ 560

390 ÷ 510

SD 490

≤ 0.32

≤ 1.80

≤ 0.55

≤ 0.040

≤ 0.040

≥ 620

490 ÷ 625

Gr 400

2. Kích thước, khõi lượng và dung sai KÍCH THƯỚC DANH NGHĨA (mm)

ĐƠN TRỌNG

TIẾT DIỆN DANH NGHĨA (cm²)

Yêu cầu theo tiêu chuẩn (kg)

Duy sai (%)

TCVN JIS TOCT ASTM TCVN JIS TOCT ASTM TCVN JIS TOCT ASTM JIS DS TCVN 6285 G3112 5781 A615M 6285 G3112 5781 A615M 6285 G3112 5781 A615M G3112 4449 6285 BS A706M BS A706M BS A706M 4449 4449 4449 6

6

6

-

0.283 0.317 0.283

-

0.222 0.249 0.222

-

-8

±9

±8

8

-

8

-

0.505

-

0.395

-

0.395

-

-

± 6.5

±8

10

10

10

10

0.71

0.617

0.56

0.617

0.56

±6

± 6.5

±5

12

-

12

-

1.131

-

1.131

-

0.888

-

0.888

-

-

± 4.5

±5

-

13

14

13

-

1.267

1.54

1.29

-

0.995

1.21

0.994

±6

-

-

16

16

16

16

0.201 1.986

2.01

1.99

1.579

1.56

1.58

1.552

±5

± 4.5

±5

-

19

18

19

-

2.865

2.54

2.84

-

2.25

2

2.235

±5

-

-

20

-

20

-

0.314

-

3.14

-

2.466

-

2.47

-

-

± 4.5

±5

-

22

22

22

-

3.871

3.8

3.87

-

3.04

2.98

3.042

±5

-

-

25

25

25

25

0.491 5.067

4.91

5.1

3.854

3.98

3.85

3.973

±5

± 4.5

±4

-

28

28

29

6.424

6.16

6.19

-

5.04

4.83

5.06

±5

-

-

32

32

32

32

0.804 7.942

8.04

8.19

6.313

6.23

6.31

6.404

±4

± 4.5

±4

-

0.503

0.785 0.713 0.785

-

Trang 2/2

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