China Seamless steel tubes for coal mining- GB/T 17396-2009 Manufacturer and Supplier

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.

Payment: 30% deposit, 70% L/C or B/L copy or 100% L/C at sight

Min.Order Quantity: 25 T

Supply Ability: Annual 20000 Tons Inventory of Steel Pipe

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

Packing: Black Vanishing, bevel and cap for every single pipe; OD below 219mm need to pack in bundle, and each bundle no exceed 2 tons.

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Product Detail

Product Tags

Overview

Standard: GB/T 17396-2009	Heat Treatment: Tempering
Grade Group: 20、35、45，Etc	Outer Diameter(Round): 10 - 1000 Mm
Section Shape: Round	Application: seamless pipe for hydraulic prop
Place Of Origin: China	Surface Treatment: As Customer's Requirement
Thickness: 1 - 100 Mm	Technique: Hot Rolled
Length: Fixed Length Or Random Length	Special Pipe: Thick Wall Pipe
Certification: ISO9001:2008	Usage: seamless pipe for hydraulic prop
Alloy Or Not: Alloy	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

	C	Si	Mn	Nb	RE	Cr	Ni	Cu	Mo	P	S
20	0.17-0.23	0.17-0.37	0.35-0.65	一	一	<0. 25	<0. 25	<0. 20	一	<0. 035	<0. 035
35	0.32-0.39	0.17—0. 37	0. 50一0.8	一	一	<0. 25	<0. 25	<0. 20	一	<0. 035	<0. 035
45	0.42-0.50	0.17 一0. 37	0.50 一0.8	一	一	<0. 25	WO. 25	WO. 20	一	<0. 035	<0. 035
27SiMn	0.24-0.32	1.10 一1.4	1.10 一1.4	一	一	W0. 30	<0.30	<0. 20	<0.15	<0. 035	<0. 035
30MnNbREa	0.27-0.36	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	Yield			Elong after fracture	Reduction of area	Shork absorption energy （KV2）/J
	Rm/MPa	MPa			A/%	Z/%
		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.