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High Precision 10# 45# 20Mn 25Mn Q235 Q345 Seamless Steel Pipe GB/T 8162

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High Precision 10# 45# 20Mn 25Mn Q235 Q345 Seamless Steel Pipe GB/T 8162

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Brand Name :	TORICH
Model Number :	GB/T 8162
Certification :	ISO9001:2008,ISO14001:2008,TS16949
Price :	negotiable
Payment Terms :	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability :	20000Ton/year
Delivery Time :	30-35 work days

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High Precision 10# 45# 20Mn 25Mn Q235 Q345 Seamless Steel Pipe GB/T 8162

GB/T 8162 Material 10# 45# 20Mn 25Mn Q235 Q345 Seamless Steel Tubes for Structural Purpose

Material:10# 20# 45# 20Mn 25Mn Q235 Q345

Size Range:

OD:3-1200mm, WT:0.5-200mm, General Length:3-12m

Tolerance:

According to the following tables or customers’ request.

Characteristic:

Good concentricity

Good OD and ID tolerance

High Precision

Stable quality

Smooth Roughness

TORICH QUALITY ASSURANCE

Tolerance of the OD &WT:

OD Tolerance:

Production Method	OD Tolerance
Hot Rolling(Extrusion)	±1% or ±0.50mm
Cold Drawn(Cold Rolled)	±1% or ±0.30mm

Tolerance for wall thickness:

1.Wall thickness tolerance of Hot Rolling steel tube:

Production Method	OD (DN)	WT/OD	Tolerance
Extruded tube	≤102	/	±12.5% or ±0.40mm
	＞102	≤0.05	±15% or ±0.40mm
		＞0.05-0.10	±12.5% or ±0.40mm
		＞0.10	+12.5% -10%
Heat expanding steel tube	/		±15%

2.Wall thickness tolerance of Cold Drawn(Cold Rolled) steel tube:

Production Method

Tolerance

Cold Drawn(Cold Rolled) steel tube

≤3

+15%/-10% or ±0.40mm

＞3

+12.5%

-10%

Bending tolerance:

WT≤15mm, Bending≤1.5mm/m

WT＞15mm~30mm, Bending≤2.0mm/m

WT＞30mm/OD≥351mm, Bending≤3.0mm/m

Ovality and Wall unevenness:

The ovality and wall unevenness should be no more than 80% of the OD and wall thickness.(Or according to customer`s request)

mechanical property

Steel Grade		Tensile strength Rm N/mm2(MPa)	Yield Strength Rp0.2 N/mm2(MPa)			Elongation A %
			Wall Thickness
			≤16mm	＞16~30mm	＞30mm
10		≥335	≥205	≥195	≥185	≥24
15		≥375	≥225	≥215	≥205	≥22
20		≥410	≥245	≥235	≥225	≥20
25		≥450	≥275	≥265	≥255	≥18
35		≥510	≥305	≥295	≥285	≥17
45		≥590	≥335	≥325	≥315	≥14
20Mn		≥450	≥275	≥265	≥255	≥20
25Mn		≥490	≥295	≥285	≥275	≥18
Q235	A	375~500	≥235	≥225	≥215	≥25
	B
	C
	D
Q275	A	415~540	≥275	≥265	≥255	≥22
	B
	C
	D
Q295	A	390~570	≥295	≥275	≥255	≥22
	B
Q345	A	470~630	≥345	≥325	≥295	≥20
	B
	C					≥21
	D
	E
Q390	A	490~650	≥390	≥370	≥350	≥18
	B
	C					≥19
	D
	E
Q420	A	520~680	≥420	≥400	≥380	≥18
	B
	C					≥19
	D
	E
Q460	C	550~720	≥460	≥440	≥420	≥17
	D
	E

Test:

Bending test
Hardness test
Impact test
Squeezing test
Non-destructive test

Processing:

RAW MATERIAL

↓

INCOMING INSPECTION

↓

STORAGE → CUTTING→HAMMERING → PICKING LUBRICATION → CLEANING → PHOSPHORI CLEAN

↓

ENDS CUTTING←STRAIGHTENING←HEAT TREATMENT↔MIDDLLE CHECK↔ COLD DRAWING ← LUBRICATING

↓

FINAL INSPECTION→BUNDING→STORAGE

Technical Delivery Conditions:Heat Treatment with Hot Rolling & Cold Drawn

Widely used in the field of:Transporting water,gas,oil etc

Product Images:

Product Tags:

seamless steel pipe

seamless carbon steel tube

High Precision 10# 45# 20Mn 25Mn Q235 Q345 Seamless Steel Pipe GB/T 8162

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