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GB/T 32970
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GB/T 32970
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Product Description
GB/T 32970 steel pipe for high-temperature and high-pressure pipeline with a straight seam submerged arc welded steel pipe, can be bent, crimped and similar processing molding, but also suitable for welding operations. Steel pipe carbon steel material grade (chemical composition) of Q235 and Q345 two kinds, using straight seam submerged arc welding process. Steel pipe alloy steel material grade (chemical composition) 15CrMo, 12Cr1MoV, etc., using straight seam submerged arc welding process.
Product Size
Outer diameter: 406.4～610.0mm
Wall thickness: 3.2～70.00mm
End: Flat end, beveling optional
Length: 3～12 meters or SRL, DRL, double feet and fixed feet.Packaging
Outer surface with clear/black paint, bundled with steel straps.
Chemical composition
C
Mn
Si
P
S
Cr
Cu
Mo
Ni
V
%
≤，%
Q245
≤0.20
0.50～1.10
≤0.35
0.025
0.010
0.30
0.30
0.08
0.25
0.05
Q345
≤0.20
1.20～1.70
≤0.55
0.025
0.010
0.30
0.30
0.08
0.30
0.05
Product Mechanical Properties
Tensile strength MPa Yield strength ≥, MPa Elongation after break ≥, %
Impact absorption energy ≥, J
hardness
thickness≤16mm
16＜thickness36mm
36＜thickness60mm
60＜thickness75mm
thickness≤16mm
16＜thickness36mm
36＜thickness 60mm
60＜thickness75mm
Longitudinal
Temperature Mean value
Brinell HBW Q245
400～520
390～510
245
235
225
205
25
0
34
Q345
510～640
500～630
490～620
345
325
315
305
20
0
41
Tensile strength MPa
Yield strength ≥, MPa
Elongation after break ≥, %
Impact absorption energy ≥, J
hardness
thickness≤16mm
16＜thickness36mm
36＜thickness60mm
60＜thickness75mm
thickness≤16mm
16＜thickness36mm
36＜thickness60mm
60＜thickness75mm
Longitudinal
Temperature Mean value
Brinell HBW 15Mo
450～600
270
≥22
Room temperature
≥40
201
20Mo
415～665
220
≥22
Room temperature
≥40
201
12CrMo
410～560
205
≥21
Room temperature ≥40
201
15CrMo
450～590
295
275
≥19
Room temperature
≥47
201
14CrlMo
520～680
310
≥19
Room temperature
≥47
201
12CrlMoV
440～590
430～580
245
235
≥19
Room temperature
≥47
201
12Cr2Mol
520～680
310
≥19
Room temperature
≥47
201
12Cr5Mo
480～640
280
≥20
Room temperature
≥40
225
Application range
Typically used in the construction of petroleum and petrochemical refineries, power plants, boilers and ships that transport fluids and gases with high temperatures and pressures.
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Yantai Pipe industry Co., Ltd.,
E-mail: info@yantaipipe.cn
WhatsApp: 8615653819370
Tel: 0086-535-6281117
Add: No. 161 Changjiang Road, FTZ, Yantai , China