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

Basic Information
Place of Origin: Zhejiang,China
Brand Name: TORICH
Certification: ISO9001:2008,ISO14001:2008,TS16949
Model Number: GB/T 8162
Minimum Order Quantity: 1 Ton
Price: negotiable
Packaging Details: packing in wooden boxes or in hexagonal bundles
Delivery Time: 30-35 work days
Payment Terms: L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Ability: 20000Ton/year
Detail Information
Product Name:: GB/T 8162 Material 20Mn 25Mn Q235 Q345 Seamless Steel Tubes For Structural Purpose Keyword: Seamless Steel Tubes
Material: 10# 45# 20Mn 25Mn Q235 Q345 Shape: Round
Usage: For Structural Purpsoes OD: 5-1200mm
WT: 0.5-200mm Length: 1-12m
High Light:

seamless steel pipe

,

seamless carbon steel tube


Product Description

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 WT 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:

  1. Bending test
  2. Hardness test
  3. Impact test
  4. Squeezing test
  5. Non-destructive test

Processing:

RAW MATERIAL

INCOMING INSPECTION

STORAGE CUTTINGHAMMERINGPICKING LUBRICATIONCLEANING 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:

High Precision 10# 45# 20Mn 25Mn Q235 Q345 Seamless Steel Pipe GB/T 8162 0

 

High Precision 10# 45# 20Mn 25Mn Q235 Q345 Seamless Steel Pipe GB/T 8162 1

Contact Details
Mike Lee

Phone Number : +8618958207750

WhatsApp : +8613736164628