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JIS G3444
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JIS G3444
Still deciding? Get samples first, Contact US !
- Description
-
Product Description
JIS G 3445 steel pipe is carbon steel pipe for mechanical structure, which can be bent, crimped and similarly shaped, and is also suitable for welding. Welded steel pipe material grades (chemical composition) are STKM11A, STKM12A/B/C, STKM13 A/B/C, STKM14 A/B/C, etc. They are manufactured by resistance welding or butt welding process.
Product Size
Outer diameter: 21.3～610mm
Wall thickness: 2.77～22.00mm
End: Flat end
Length: 3～12 meters or SRL, DRL, double and fixed feet.Packaging
Outer surface coated with oil or clear/black paint, also hot-dip galvanized, bundled with steel straps.
Chemical composition
C
Si
Mn
P
S
Nb+V
≤，%
STKM11A
0.12
0.35
0.6
0.04
0.04
一
STKM12A
0.20
0.35
0.6
0.04
0.04
一
STKM12B
STKM12C
STKM13A
0.25
0.35
0.30－0.90
0.04
0.04
一
STKM13B
STKM13C
STKM14A
0.3
0.35
0.30－1.00
0.04
0.04
一
STKM14B
STKM14C
STKM15A
0.2－0.35
0.35
0.30－1.00
0.04
0.04
一
STKM15C
STKM16A
0.35－0.45
0.4
0.40－1.00
0.04
0.04
一
STKM16C
STKM17A
0.45－0.55
0.4
0.40－1.00
0.04
0.04
一
STKM17C
STKM18A
0.18
0.55
1.5
0.04
0.04
一
STKM18B
STKM18C
STKM19A
0.25
0.55
1.5
0.04
0.04
一
STKM19C
STKM20A
0.25
0.55
1.6
0.04
0.04
0.15
Product Mechanical Properties
Tensile strength ≥, MPa
Yield strength ≥, MPa
Elongation at break ≥, % Specimen No. 11 or 12, longitudinal
Specimen No. 5, transverse
Specimen No. 4, longitudinal
Specimen No. 4, horizontal
STKM11A
290
一
35
30
33
28
STKM12A
340
175
35
30
33
28
STKM12B
390
275
25
20
23
18
STKM12C
470
355
20
15
18
14
STKM13A
370
215
30
25
28
23
STKM13B
440
305
20
15
18
14
STKM13C
510
380
15
10
14
9
STKM14A
410
245
25
20
23
18
STKM14B
500
355
15
10
14
9
STKM14C
550
410
15
10
14
9
STKM15A
470
275
22
17
20
16
STKM15C
580
430
12
7
11
6
STKM16A
510
325
20
15
18
14
STKM16C
620
460
12
7
11
6
STKM17A
550
345
20
15
18
14
STKM17C
650
480
10
5
9
4
STKM18A
440
275
25
20
23
18
STKM18B
490
315
23
18
21
17
STKM18C
510
380
15
10
14
9
STKM19A
490
315
23
18
21
17
STKM19C
550
410
15
10
14
9
STKM20A
540
390
23
18
21
17
Application range
Typically used in the construction of machinery, automobiles, bicycles, furniture, appliances and other mechanical components.
Related Products
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Contact Us
Yantai Pipe industry Co., Ltd.,
E-mail: info@yantaipipe.cn
WhatsApp: 8615653819370
Tel: 0086-535-6281117
Add: No. 161 Changjiang Road, FTZ, Yantai , China