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JIS Number and Corrensponding Foreign Standards

JIS Standard Number Grade G3445 STKM11A

ASTM

Tupe C

BS

Standard Number A512 A513

Grade MT1010 MT1010

Tupe C C

A512 A513 A512 A513 A519

MT1015 MT1015 MT1015 MT1015 MT1015

C C C C C

STKM12A

C

STKM12B

C

STKM12C

C

STKM13A

C

A312 A513

MT1020 MT1020

C C

STKM13B STKM13C

C C

A513

MT1020

C

STKM14A

C

A513

STKM14B STMK14C STKM15A

C C C

STKM15C STKM16A

C

STKM16C STKM17A STKM17C STKM18A

C C C C

STKM18B

C

MT1020

C

A513 A519

1030 1030

C C

A519

1040

C

A519

1050

C

A519

1518

C

Standard Number 1717

Grade ERWC1

Tupe C

1717 6323

ERWC2 HFS3

C C

1717 " 6323 " 1717

CEWC2 CFSC3 CFS3 CFS3A ERWC3

C C C C C

1717 " 6323 6323

CEWC3 CFSC4 CFS4 HFS4

C C C C

6323

HFS5

C

6323 6323 1717

HFS8 CFS8 ERWC5

C C C

STKM18C

C

STKM19A

C

A519

1524

C

DIN Standard Number 2391 2393 2394

2391 2394

2391 2393 2394

Grade St30Si St30A1 St28 RSt28 St28 USt28 RSt28 St37-2 RSt37-2 St37-2 Ust38-2 RSt-2

St45 St44-2 St44-2

NF

Tupe C C C C C C C

C C C

Standard Number

Grade

ISO

Tupe

A49-322 A49-327

TU37b TU37b

C C

A49-324 A49-330 A49-343

TU37b TU37b TU38b

C C C

A49-311 A49-312

TUXC35 TUXC35

C C

A49-310 A49-311 A49-312 A49-321

TU52b TU52b TU52b TU52b

C C C C

Standard Number 3304 3305 3306

Grade R28 " "

Tupe C C C

3304 3305 3306

R33 " "

C " "

2937 3304 3305 3306

TS4 R37 " "

C " " "

2937 3304 3305 3306

TS9 R42 R42 "

C " C "

Index Number C017

A49-323 A49-326 A49-330 A49-341 " A49-343 2391 2393 2394

ST52 ST52-3 ST52-3

C C C

TU52b TU52b TU52b TS42a TS47a TS18M5

C C C C C C 2937 2938 3304 3305

TS18 Gr.1 R50 R50

C C C C

Inspection 9.1 Inspection The general requirements for inspection shall be in accordance with JIS G 0303.

9.2 The chemical composition, mechanical properties, dimensions and apperance shall conform to the requirenments specified in 3., 4., 5. and 6. the bending test and the fla ttening test, however, may be om when approved by the purchaser.

9.3 The purchaser may specify a flaring test, hydrostatictest, etc., in addition to those specified in 9.2 In case, the test items, sampling method and acceptance criteria shall be previously agreed upon by the manufacturer. 9.4 The numver of specimens for product analysis shall be as agreed upon by the purchaser and the manufacturer.

9.5 The method of sampling specimens and the number of test pieces for tensile test, bending test and test shall be as given in Table 6.

Table 6. Method of Sampling Specimens and Number of TEst Pieces.

Grade

Designation

Division of outside diameter

A and B of 11 to 20

STKM 11A STKM 12A STKM 12B STKM 13A STKM 13B STKM 14A STKM 14B STKM 15A STKM 16A STKM 17A STKM 18A STKM 18B

100 mm or under

STKM 19A

Over 100 mm up to and incl. 200 mm

STKM 20A

Over 200 mm

STKM 12C STKM 13C STKM 14C STKM 15C 100 mm or under

C of 12 to 19 [ close ]

STKM 16C STKM 17C

100 mm or under

STKM 18C

Over 100 mm up to and incl. 200 mm

STKM 19C

Over 200 mm

pperance shall conform to the ning test, however, may be omitted

dition to those specified in 9.2 In this reviously agreed upon by the

on by the purchaser and the

r tensile test, bending test and flattening

of TEst Pieces. Method of sampling specimens and number of test pieces

Take one specimen from each 1000 m or its fraction of the tubes of the same dimensions. From the specimen, take one flattening or bend test piece for the tubes 50 mm or under in outside diameter, and one flattening test piece for the tubes over 50 mm in outside diameter, in addition to each one tensile test piece in either case. Take one specimen from each 500 m or its fraction of the tubes of the same dimensions. From the specimen, take one tensile test piece and one flattening test piece. Take one specimen from each 250 m or its fraction of the tubes of the same dimensions. From the specimen, take one tenseil test piece and one flattening test piece.

Take one specimen from each 1000 m or its fraction of the tubes of the same dimensions. From the specimen, take one tensile test piece.

Take one specimen from each 1000 m or its fraction of the tubes of the same dimensions. From the specimen, take one tensile test piece. Take one specimen from each 500 m or its fraction of the tubes of the same dimensions. From the specimen. take one tensile test piece. Take one specimen from each 250 m or its fraction of the tubes of the same dimensions. From the specimen.take one tensile test piece.

Test 8.1 Chemiacl Analysis 8.1.1 Chemical analysis The general requirements for chemical analysis and method of sampling specimens for analysis shall be in accordance with the 3. in JIS G 0303 8.1.2 Analytical Method The analytical method shall be in accordance with one of thefollowing Standards. JIS G 1211. JIS G 1212, JIS G 1213, JIS G 1214, JIS G 1215, JIS G 1221, JIS G 1237, JIS G 1243, JIS G 1256, JIS G 1257 . 8.2 Tensile Test 8.2.1 Test Piece The test piece shall be No. 11, No. 12 A, No. 12 B, No. 12 C, No. 4 or No. 5 test piece specified in JIS Z 2201 and shall be cut off from the tube. The gauge length for No. 4 test piece, however, shall be 50 mm 8.2.2 Test Method The test method shall be in accordance with JIS Z 2241. 8.3 Bending Test 8.3.1 Test Piece A suitable length of a tube shall be cut off from oneend of the tube to be made into a test piece. 8.3.2 Test Method The test piece shall be bent, at ordinary temperature around a cylinder with the bend angle and inside radius specified in Table 3 and checked for the occurrence of flaws or cracks. In the case of electric resistance welded steel tubes and butt-welded steel tubes, the weld shall be placed in the outermost part of the bent portion 8.4 Flattening Test 8.4.1 Test Piece A test piece 50mm or over in length shall be cut off from one end of a tube. For the tube of wall thickness 15 % or over of its outside diameter, a test piece made into C-shape by removing part of the circumference of a fullsection test piece may be used. 8.4.2 Test Method The test piece shall be placed between two flat plates, flattened by compression at ordinary temperature until the distance between the plates comes to the specified in Table 3, and checked for the tance welded steel tubesand butt-welded steel tubes, the weld shall be placed at right angles to the direction of compression as shown in Fig. 1. Further, a C-shape test piece shall be placed as shown in Fig. 2.

Fig 1. Flattning Test (for Full-section Test Piece) Fig 2. Flattening Test (for C-shape Test Piece) [ close ]

4. Chemical Composition The tube shall be tested in accordance with 8.1 and the resulting ladle analysis values shall conform to Table 2. Table 2. chemical Compositon

Grade Grade 11

A A B

Grade 12

C A B

Grade 13

C A B

Grade 14

C A

Grade 15

C A

Grade 16

C A

Grade 17

C A B

Grade 18

Designatio n C STKM 11A 0.12 max. STKM 12A STKM 12B STKM 12C 0.20 max. STKM 13A STKM 13B STKM 13C 0.25 max. STKM 14A STKM 14B STKM 14C 0.30 max. STKM 15A STKM 15C 0.25~0.35 STKM 16A STKM 16C 0.35~0.45 STKM 17A STKM 17C 0.45~0.55 STKM 18A STKM 18B

Unit % Si

Mn

0.35 max. 0.60 max.

P 0.040 max.

S 0.040 max.

0.35 max. 0.60 max.

0.040 max.

0.040 max.

0.35 max. 0.30~0.90

0.040 max.

0.040 max.

0.35 max. 0.30~1.00

0.040 max.

0.040 max.

0.35 max. 0.30~1.00

0.040 max.

0.040 max.

0.40 max. 0.40~1.00

0.040 max.

0.040 max.

0.40 max. 0.40~1.00

0.040 max.

0.040 max.

0.18 max. 0.55 max. 1.50 max.

0.040 max.

0.040 max.

Grade 18

C A

Grade 19

C

Grade 20

A

STKM 18C STKM 19A STKM 19C STKM 20A

0.18 max. 0.55 max. 1.50 max.

0.25 max. 0.55 max. 1.50 max. 0.25 max. 0.55 max. 1.60 max.

0.040 max.

0.040 max.

0.040 max. 0.040 max.

0.040 max. 0.040 max.

Remarks 1. When the purcha ser requires product analyssis for the tubes made of killed steel, the tolerances for the values given above shall be as specified in Table 2 in JIS G 0321 for seamless steel tubes and in Table 1 for electric resistance welded or butt welded steel tubes. 2. For the tubes of Grade 15 made by electric resistance welding process, the lower lim it of carbon content may be altered by agreement between the parties concerned. 3. For the tubes of Grade 20, Nb in combina tion with V may be added. In this case, the maximum content of Nb + V shall be 0.15 %. [ close ]

is values shall conform

Nb or V -

-

-

-

-

-

-

-

-

0.15 max.

d steel, the tolerances seamless steel tubes

e lower limit of carbon

case, the maximum

JIS

ASTM

Standard Number

Grade

Tupe

G3445

STKM11A

C

BS

Standard Number

Grade

Tupe

A512 A513

MT1010 MT1010

C C

Standard Number

Grade

1717

ERWC1

[ close ]

DIN

NF

Standard Number

Standard Number

ISO Tupe

C

Grade

Tupe

2391

St30Si St30A1

C C

2393

St28 RSt28 St28 USt28 RSt28

C C C C C

2394

Grade

Tupe Standard Number 3304 3305

Grade R28 "

3306

"

ISO

Tupe C C C

Index Number C017

Mechanical Properties 5.1 Tensile Strength, Yield Point or Proof Stress, and Elongation The tube shall be tested in accordance with 8.2 and the resulting tensile strength, yield point or proof str and elongation shall comply with Table 3 5.2 Bending Strength or Flattening Strength The tube shall be tested in accordance with 8.3 or 8.4 and shall be free from flaws or cracks on their wal surfaces. The bending test, however, shall be applied to the tubes 50 mm or under in outside diameter in lieu of flattening test when especially specified by the purchaser.

Tensile Yield point strength or proof N/§± N/§±

{kgf/§±}

12Á¾

13Á¾

A

STKM11A

A

STKM12A

B

STKM12B

C

STKM12C

A

STKM13A

B

STKM13B

No. 4,

No. 4,

No. 11

No. 5

No. 12 test pieces Longitudin al direction

Designatio n

Grade 11Á¾

{kgf/§±}

Elongation %

290{30} min. 340{35} min. 390{40} min. 470{48} min. 370{38} min.. 440{45} min..

175{18} min. 275{28} min. 355{36} min. 215{22} min. 305{31} min.

Flattening strength Distance between flat plates (H) (D is outside dia. of the tube)

test pieces Transvers e direction

35 min.

30 min.

1/2 D

35 min.

30 min.

2/3 D

25 min.

20 min.

2/3 D

20 min.

15 min.

-

30 min.

25 min.

2/3 D

20 min.

15 min.

3/4 D

13Á¾

C

STKM13C

A

STKM14A

B

STKM14B

C

STKM14C

A

STKM15A

C

STKM15C

A

STKM16A

C

STKM16C

A

STKM17A

C

STKM17C

A

STKM18A

B

STKM18B

C

STKM18C

A

STKM19A

19Á¾

C

STKM19C

20Á¾

A

STKM20A

14Á¾

15 Á¾

16Á¾

17 Á¾

18Á¾

510{52} 380{39} min.. min. 15 min. 410{42} 245{25} min.. min. 25 min. 500{51} 355{36} min. min. 15 min. 550{56} 410{42} min.. min. 15 min. 470{48} 275{28} min.. min. 22 min. 580{59} 430{44} min.. min. 12 min. 510{52} 325{33} min.. min. 20 min. 620{63} 460{47} min.. min. 12 min. 550{56} 345{35} min.. min. 20 min. 650{66} 480{49} min.. min. 10 min. 440{45} 275{28} min.. min. 25 min. 490{50} 315{32}mi min.. n. 23 min. 510{52} 380{39} min. min. 15 min. 490{50} 315{32} min. min. 23 min. 550{56} 410{42} min. min. 15 min. 540{55} 390{40} min. min. 23 min.

10 min.

-

20 min.

3/4 D

10 min.

7/8 D

10 min.

-

17 min.

3/4 D

7 min.

-

15 min.

7/8 D

7 min.

-

15 min.

7/8 D

5 min.

-

20 min.

7/8 D

18 min.

7/8 D

10 min.

-

18 min.

7/8 D

10 min.

-

18 min.

7/8 D

Remarks When the tensile test is carried out on No. 12 or No. 5 test piece for the tube under 8 mm in wall thicknes

2. The values of elongation in Table 3 shall not be applied to the these 40 mm or smaller in outside diam However, it may be agreed upon by the purchaser and the manufacturer. when especially reequired. 3. For electric resistance welded steel tubes ad butt-welded steel tubes.the tensile test pieces shall be N or No. 5 and they shall be taken from a portion not involving welded seems.

4. For the flattening test, the minimum distance between the flat plates (H) shall be 5 times the plate thic

gth, yield point or proof stress,

laws or cracks on their wall

utside diameter in lieu of

Bending strength

Inside radius (D is outside dia. of the tube)

Bend angle 180

4D

90

6D

90

6D

-

-

90

6D

90

6D

-

-

90

6D

90

8D

-

-

90

6D

-

-

90

8D

-

-

90

8D

-

-

90

6D

90

8D

-

-

90

6D

-

-

90

6D

under 8 mm in wall thickness, the minimum value of elongation shall be calculated by subtracting 1.5 % from the values of elongation given

m or smaller in outside diameter. en especially reequired. nsile test pieces shall be No. 12

all be 5 times the plate thickness

7. Dimensional Tolerances

7.1 The tolerances on outside diameter and wall thickness for the tubes shall be as given in Table 4 an 5, respectively .

Table 4. Tolerances on Outside Diameter

Division No. 1 No. 2

No. 3 Remarks 1.For hot finished seamless steel tube,

the outside diameter tolerances No. 1 shall be applied.

2.The tolerances on outside diameter of quenched and tempered tubes shall be as agreed upon by the and the manufacturer.

Table 5. Tolerances on Wall Thickness

Division

No. 1

N. 2

No. 3

Remarks For hot finished seamless steel tubes the tplerances NO. 1 shall be applied.

7.2 The tolerances on the tube length shall be in the range of 0 to + 50 mm.

However, when tolerances outside this range are especially required,

agreement shall be made between the purchaser and the manufacturer. [ close ]

diameter and wall thickness for the tubes shall be as given in Table 4 and Table

Table 4. Tolerances on Outside Diameter

Tolerances on outside diameter Under 50mm ¡¾0.5mm 50mm or over ¡¾1% Under 50mm ¡¾0.25mm 50mm or over ¡¾0.5% Under 25mm ¡¾0.12mm 25mm or over to and excl. 40mm ¡¾0.15mm 40mm or over to and excl. 50mm ¡¾0.18mm 50mm or over to and excl. 60mm ¡¾0.20mm 60mm or over to and excl. 70mm ¡¾0.23mm 70mm or over to and excl. 80mm ¡¾0.25mm 80mm or over to and excl. 90mm ¡¾0.30mm 90mm or over to and excl.100mm ¡¾0.40mm 100mm or over ¡¾0.50%

l tube,

No. 1 shall be applied.

meter of quenched and tempered tubes shall be as agreed upon by the purchaser

Table 5. Tolerances on Wall Thickness

Tolerances on wall thickness Under 4mm +0.6mm -0.5mm 4mm or over +15% -12.5% Under 3mm ¡¾0.3mm 3mm or over ¡¾10% Under 2mm ¡¾0.15mm 2mm or over ¡¾8%

ess steel tubes the tplerances NO. 1 shall be applied.

ength shall be in the range of 0 to + 50 mm.

de this range are especially required,

en the purchaser and the manufacturer.