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 Seamless steel tubes for coal mining- GB/T 17396-2009

Short Description:

Seamless steel pipe for coal mine is mainly used to manufacture seamless pipe for

hydraulic prop in coal mine.


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Overview

Standard:   GB/T 17396-2009

Grade Group: 203545Etc

Section Shape: Round

Place Of Origin: China

Thickness: 1 - 100 Mm

Length: Fixed Length Or Random Length

Certification: ISO9001:2008

Alloy Or Not: Alloy

 

Heat Treatment: Tempering

Outer Diameter(Round): 10 - 1000 Mm

Application: seamless pipe for hydraulic prop

Surface Treatment: As Customer's Requirement

Technique: Hot Rolled

Special Pipe: Thick Wall Pipe

Usage: seamless pipe for hydraulic prop

Test:NDT

Application

Seamless steel pipe for coal mine is mainly used to manufacture seamless pipe for hydraulic prop in coal mine.

Main Grade

Grade of high-quality carbon structural steel: 20#35#

Chemical Component

Grade Chemical Component/%
C Si Mn Nb RE Cr Ni Cu Mo p S
20 0. 17 一0. 23 0.17 一0. 37 0. 35一0.65 <0. 25 <0. 25 <0. 20 <0. 035 <0. 035
35 0. 32一0. 39 0.17—0. 37 0. 50一0.8 <0. 25 <0.25 <0. 20 <0. 035 <0. 035
45 0. 42一0. 50 0.17 一0. 37 0.50 一0.8 <0. 25 WO. 25 WO. 20 <0.035 <0.035
27SiMn 0. 24一0. 32 1.10 一1.4 1.10 一1.4 W0. 30 <0.30 <0. 20 <0.15 <0.035 <0. 035
30MnNbREa 0.27 一0. 36 0. 20一0. 60 1.20 一1. 60 0.020一0. 050 0. 02一0. 04 <0. 30 <0. 30 <0. 20 <0.15 <0. 035 <0. 035
a The content of re is calculated as 0.02% ~ 0.04% added to the molten steel.

Mechanical Property

Mechanical Property
Grade Tensile strength
Rm/MPa
Yield
MPa
Elong after fracture
A/%
Reduction of area
Z/%
Shork absorption energy (KV2)/J
Steel tube wall thickness/mm
<16 >16 〜30 >30
no more less
20 410 245 235 225 20
35 510 305 295 285 17
45 590 335 325 315 14
27SiMn 980 835 12 40 39
30MnNbRE 850 720 13 45 48

Test Requirement

In addition to ensuring the chemical composition and mechanical properties, the steel pipe directly rolled with ingot shall be subject to low power inspection.

Supply Ability

Supply Ability: 2000 Tons Per Month Per Grade of   Seamless steel tubes for coal mining.

Packaging

In Bundles And In Strong Wooden Box

Delivery

7-14 days if in stock, 30-45 days to produce

Payment

30% depsoit, 70% L/C or B/L copy   or  100% L/C at sight

Product Detail


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