Applicable Standard
GB3087：Seamless steel pipe for low and medium pressure boiler
GB9948：Seamless steel pipe for petroleum cracking
GB6479：Seamless steel pipes for high-pressure fertilizer equipment
GB/T17396：Hot rolled seamless steel pipe for hydraulic prop
Characteristics and Application
20# steel
belongs to high-quality low-carbon carbon steel, cold-extruded and hardened steel. The steel has low strength, good toughness, plasticity and weldability. It belongs to high-quality low-carbon carbon steel, cold-extruded and hardened steel. The steel has low strength, good toughness, plasticity and weldability. It is generally used to manufacture seamless pipes with low stress and high toughness requirements.
Size Range
|
Grade
|
Size Range
|
|
|
OD
|
WT
|
|
20#
|
21～1200
|
3～130
|
Chemical Component
|
Grade
|
Chemical Component %
|
|
|
C
|
Si
|
Mn
|
Cr
|
Mo
|
V
|
Ti
|
B
|
Ni
|
Cu
|
Nb
|
N
|
W
|
P
|
S
|
|
20#
|
0.17-
0.23
|
0.17-
0.37
|
0.35-
0.65
|
≤
0.25
|
—
|
—
|
—
|
—
|
≤
0.30
|
≤
0.20
|
—
|
—
|
—
|
≤
0.030
|
≤
0.030
|
Mechanical Property
|
Grade
|
Mechanical Property
|
|
|
Tensile Strength(MPa)
|
Tensile Strength(Mpa)
|
Elogation(L/T)
|
Impact(J)
Vertical/Horizontal
|
Hardness(NB)
|
|
20#
|
410-
550
|
≥
245
|
≥20%
|
≥40/27
|
—
|
Advantage
1. Delivery period: Large inventory make sure minimum delivery period, mainly 5-7 days.
2. Cost management: Resources at hand and vast experience of cost management let us can provide most suitable resource combination base on customer's needs
3. Top mill resource: Can provide full set certificate and qualification documents to prove high quality and provide support to tender.
4. Strict QC system: Whole flow onsite inspection, fully test and report, third-party inspection
5. After service: all products traceable, Tracing the source of liability