Seamless Alloy Steel Tube




We are manufacturer of Seamless Alloy Steel Tube and supply high quality Seamless Alloy Steel Tube in both large and small quantities worldwide and offer you the best prices in the market.


CDCold Drawn SeamlessCFSCold Finished SeamlessHFSHot Finished Seamless
CDNCold Drawn, Condition NCDACold Drawn AnnealedHFHTHot Finished Heat Treated
CDHTCold Drawn Heat TreatedDOMDrawn Over Mandrel
CDSRCold Drawn Stress RelievedHRAHor Rolled Annealed

Specifications

GradeClassASTMMILAMS
4130CDNA-519T-67366360
4130CDSRA-519--
4130CFS.HFSA-519-6371
4135CDNA-519T-67356365
4135CDSRA-519--
4135CFS.HFSA-519-6372
4140CDSRA-519--
4140.42CDA.HRAA-519--
4140CFS.HFSA-519-6381
4140.42HFHTA-519--
4150CDHTA-519--
4340HRAA-519--
4340CFS.HFSA-519-6415
4340HFHTA-519--
5130HCFSA-519--
8615HFSA-519--
8617CFSA-519--
8620CFSA-519--
9310CFSA-519--

Properties

Material Grade & TemperTensile K.S.I.Yield K.S.I.Elong % In "2"Hard. B.H.N.
4130 Normalized90 approx.70 approx.20 approx.187 approx.
4130 Annealed80 approx.50 approx.30 approx.165 approx.
4130 CDSR110 approx.95 approx.15 approx.228 approx.
4130 Heat Treated125-180100-1658-12250-355
4135 Normalized95 approx.80 approx.15 approx.197 approx.
4135 Annealed85 max.55 approx.30 approx.174 approx.
4135 CDSR125 approx.100 approx.10 approx.235 approx.
4140/42 Annealed90 approx.65 approx.25 approx.197 approx.
4140 CDSR120 approx.100approx.10 approx.245 approx.
4140 Heat Treated140 approx.115 approx.16 approx.311 approx.
4150 Heat Treated160 approx.130 approx.16 approx.346 approx.
4340 Annealed110 approx.75 approx.20 approx.225 approx.
4340 Heat Treated140 approx.115 approx.16 approx.311 approx.
6820 Annealed78 approx.56 approx.29 approx.115 approx.
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other purposes.

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DIN Seamless steel pipe



DIN/EN seamless pipes are extensively applied in petroleum, chemical, power, boiler, and machinery industries. Our prefect products and preferential price have won us customers’ trust and consistently favorable comments.





Our products for DIN/EN Standard has been listed as follows:
BS3059-II 360 Seamless tube
BS3059-II 360 Seamless tube
BS 3059 II 440 boiler tube
BS 3059 II 440 boiler tube
Tubes according to EN 10305-1
Tubes according to EN 10305-1
EN 10216-1 Seamless tubes for pressure purposes
EN 10216-1 Seamless tubes for pressure purposes
EN 10210 Hot finished seamless pipe
EN 10210 Hot finished seamless pipe
DIN 17175 steel seamless pipes
DIN 17175 steel seamless pipes

DIN 2448 seamless steel pipes
DIN 2448 seamless steel pipes
EN10216-2 Non-alloy and steel tubes
EN10216-2 Non-alloy and steel tubes
EN 10297 Mechanical seamless Tubes
EN 10297 Mechanical seamless Tubes
EN 10216 Seamless Steel Tubes
EN 10216 Seamless Steel Tubes
DIN2391 Seamless Precision Steel Tube
DIN2391 Seamless Precision Steel Tube
DIN 1629 Seamless Tubes
DIN 1629 Seamless Tubes

DIN 1630

Steel Grade: St37.4, St44.4, St52.4

Application: Seamless Circular Tubes of Non. Alloy Steels With Very High Quality Requirements

Dimension Range: 10.2-660 mm
DIN 2391-1

Steel Grade: St35, St45, St52

Application: Seamless Precision Steel Tubes

Dimension Range: 4-260 mm
DIN 2440

Steel Grade: St33.2

Application: Steel Tubes Medium Weight Suitable for Screwing

Dimension Range: 10.2-165.1 mm
DIN 2441

Steel Grade:St33.2

Application: Steel Tubes Heavy Weight for Suitable for Screwing

Dimension Range: 10.2-165.1 mm
DIN 2445-1

Steel Grade: St 52.4

Application: Seamless Steel Tubes Subjected to Dynamic Loading-1 Hot Finished Tubes for Use in Fluid Power Systems, Rated for Pressures from 100 bar to 500 bar

Dimension Range: 21.3-355.6 mm
DIN 2445.2

Steel Grade: St 37.4

Application: Seamless Steel Tubes Subjected to Dynamic Loading-2 Precision, Tubes for Use in Fluid Power Systems, Rated for Pressures from 100 bar to 500 bar

Dimension Range: 4.50 mm
DIN 2460

Steel Grade: St35

Application: Steel Pipes for Water Pipelines

Dimension Range: DN80-500
DIN 17175

Steel Grade: St35.8, S05.8,17Mn4,19Mn5, 15Mo3, 13CrMo910, 1OCrMo910, 14MoV63, X20CrMoV12l

Application: Seamless Circular Tubes Made From Steels with Elevated Temperatures

Dimension Range: 10.2-660 mm

Dimension tolerance

StandardTolerance
Out side DiameterWall ThicknessLength
mm
DIN 1630See Table 1See Table 2See Table 3
DIN 2391See Table 410%See Table 5
DIN 2440See Table 6-12.5%, + A±1m
DIN 2441See Table 2-12.5%, + A±1m
DIN 17172SeeTable 7≤13010%Fixed

Length
±500
<13012.5%
DIN 17173See Table 1See Table 2See Table 3
DIN 17175See Table 1See Table 2See Table 3
DIN 17176See Table 8See Table 2See Table 3
DIN 17179See Table 1See Table 2See Table 3
DIN 28180Outside

Diameter
Class 1Class 2Class 3See Table 9≤5000-0,+5
16-30±0.08Not

Applicable
±0.50<5000

-10000
-0,+10
38±0.15<10000By

agreement
A: The upper Limit is fixed by the permissible weight deviation.
Table 1: Permissible Deviation in Outside Diameter in DIN 1630, 17173, 17175, 17179
Outside Diameter – da

mm
Pertilisable Deviation in Diameter
Tube Barrel and Tube EndsAt Tube ends, Subject to

Particular agreement
<100 td>±1% da; (values up to ±0.5mm

are permitted)
±0.4mm
100≤da<200 td>±1% da±0.5% da.
≥200±1% da±0.6% da
Table 2: Permissible Deviation in Wall Thickness in DIN 1630, 17173, 17175, 17176, 17179
Permissible Deviation in Wall Thickness for Outside Diameter, da. and Wall Thicknesses, s
da ≤130mm130mm320mm
s ≤22s<4s≤0.05da0.05da
≤.11da
s<0.11da.s≤0.05da0.05da
≤0.09da
s<0.09da
+5%

-10%
+12.5

%10
±9%+17.5%

-12.5%
±12.5%±10+20%

-15%
+15%

-12.5%
+12.5%

-10%
Table 3: Types of Length and Permissible Deviation in Length in DIN 1630, 17173, 17175, 17176, 17179
Type of LengthPremissuble Deviations in Length,mm
Manfacturing LengthBy agreement
Specified Length±500
Exact

Length
≤6m-0,+10
<6-12mm-0,+15
<12mBy agreement
Table 4: Permissible Deviation in Outside Diameter in DIN 2391
Outside

Diameter
Permissible

Deviation
Outside

Diameter
Permissible

Deviation
Outside

Diameter
Permissible

Deviation
4-10mm±0.08mm75-81mm±0.35mm170-180mm±0.90mm
12-30mm±0.1mm85-90mm±0.40mm190-200mm±1.0mm
32-40mm±0.15mm95-100mm±0.45mm220-240mm±1.20mm
42-50mm±0.20mm110-12mm±0.50mm260mm±1.30mm
55-60mm±0.25mm130-146m±0.70mm
65-70mm±0.30mm150-160m±0.80mm
Table 5: Types of Length and Permissible Deviation in Length in 2391
Type of LengthPremissuble Deviations in Length,mm
Manfacturing LengthBy agreement
Fixed Length<2000 td>±500
≥200010%
Exact

Length
<500mm td>-0,+2
<500-2000mm-0,+3
<2000-5000-0,+5
<5000-7000-0,+10
<7000By agreement

Table 6: Permissible Deviation in Outside Diameter in DIN 2440, 2441

Outside Diameter

(mm)
Max

(mm)
Min

(mm)
Outside Diameter

(mm)
Max

(mm)
Min

(mm)
10.210.69.848.348.847.9
13.514.013.260.360.859.7
17.217.516.276.170.675.3
21.321.821.088.989.688.0
26.927.326.5114.3115.0113.1
33.734.233.3139.7140.0138.5
42.442.942.0165.1166.5163.9

Table 7: Permissible Deviation in Outside Diameter in DIN 17172

Nominal Outside

Diameter-”D”

(mm)
Max.Permissible Diameter Variation
Pipe BodyPipe End
D<200 td>±1%(Values up to ±0.5mm

are permissible in all case)
±1%(Values up to ±0.5mml.

are permissible in A case)
200≤ D<500 td>±1%±0.7%
500≤D±1%1.6mm
Table 8: Permissible Deviation in Outside Diameter in DIN 17176
Manufacturing ProcessLimit Deviation of Outside Diameter
Cold Forming±0.75%
Hot Forming≤100mm±0.75%
<100-320mm±0.9%
<320mm±1.0%

Table 9: Permissible Deviation in Wall Thickness in DIN 28180

Tube Outside DiameterPermisible Deviations In Wall Thickness for Thicknesses
Up to 2Exceeding 2
Tolerance of Classes I and 2±0.20±10% of Wall Thickness
Tolerance Class 3±0.20-10%, +15% of Wall Thickness

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