Boiler steel Boiler steel tube Fluid Pipe
( Div. of Sterling Tubes & Valves Pvt. Ltd. ) TPI ( Third Party Inspection ) Managements
 
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Honed Tube DIN-2391 Ready to Hone Tube ST-52
Cylinder Tube DIN 2391 - ST-52 Structure Pipe ASTM A53/A53M
Carbon Steel Seamless Pipe ASTM A106 Cold Drawn Seamless Steel Tube ASTM A179
Cold Drawn Seamless Steel Tube ASTM A192 Cold Drawn Seamless Steel Tube ASTM A210
Steel Tubes for Precision Applications Cold Drawn Steel Tube
Cold Drawn Seamless Steel Tube DIN17175 Carbon Steel Seamless Pipe EN10297 & Hollow Pipe
 
Honed Tube DIN-2391
Grade :- ST52 Specification DIN2391 Delivery Condition BK +S
Diameter :- 40mm to 400mm
Special Pipe :- Thick Wall Pipes
Types :- Seamless
Technique :- Cold Drawn
Section Shape :- Round
Dimension Accuracy :- 1. Tolerances on Inner Diameter :- ISO H8
2. Tolerances on Wall Thickness :- Diameter >40 +/- 0.2mm,
Diameter 40<100 +/- 0.3mm, Diameter >100 +/- 0.5mm, 3. Surface Roughness :- Ra = 0.2 ~ 0.4 Micron
Length of Tubes :- Random ( 5 to 7 meters ) or Fixed length as per order of confirmation
Material Certificates :- As per EN 10204 / 3.1B
Scope :- Hydraulic Cylinder Tube for Swivel Crane, Injection Machine, Construction Machine, Material Handling Machinery and other Hydraulic Machinery Parts
Fluid Pipe,Honed Cylinder Tube Fluid Pipe
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Ready to Hone Tube ST-52
Grade :- ST52 Specification DIN2391 Delivery Condition BK +S
Diameter :- 40mm to 400mm
Special Pipe :- Thick Wall Pipes
Types :- Seamless
Technique :- Cold Drawn
Section Shape :- Round
Dimension Accuracy :- 1. Tolerances on Inner Diameter :- ISO H8
2. Tolerances on Wall Thickness :- Diameter >40 +/- 0.2mm,
Diameter 40<100 +/- 0.3mm, Diameter >100 +/- 0.5mm, 3. Surface Roughness :- Ra = 0.2 ~ 0.4 Micron
Length of Tubes :- Random ( 5 to 7 meters ) or Fixed length as per order of confirmation
Material Certificates :- As per EN 10204 / 3.1B
Scope :- Hydraulic Cylinder Tube for Swivel Crane, Injection Machine, Construction Machine, Material Handling Machinery and other Hydraulic Machinery Parts
Fluid Pipe    
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Cylinder Tube DIN 2391 - ST 52
Honed Tube
A. Material : CK20(SAE1020), CK45(SAE1045), 16Mn(St-52), 27SiMn
B. Polishing: To 0.4Ra Max,
C. Precision of size: H8-H9,
D. Cylinder ID: From 40mm diameter up to 800mm diameter,
E. Length: 13000mm maximum,
F. Thickness: 2.5mm diameter up to 55mm diameter,

Pneumatic Cylinder and Hydraulic Cylinder,
A. Standard cylinders,
B. OEM cylinders according your drawings or samples.
Material CK20(SAE1020) , CK45(SAE1045) , 16Mn(St-52) , 27SiMn
Diameter (mm) Drawing 40-320
Drawing- Honed 40-500
Length (m) Drawing :≤12
Drawing- Honed :≤8
Straight(mm/m) Drawing 0.2-0.5
Drawing- Honed 0.2-0.3
Tolerance Drawing H8-H10
Drawing- Honed H7-H9
Wall Thickness Drawing ±5%
Drawing- Honed ±5%
In side Surface Roughness Drawing 0.8-1.6
Drawing- Honed 0.2-0.8
Outside Surface Raw Material
Ø Wall Thickness : 2-55mm
Ø Supply Condition :BK(+C), BK+S (+SR)
Ø Protection :
The tubes are supplied with caps at the ends and protected internally and externally with oil that provides temporary protection against oxidization. Special surface protection can be agreed upon.
Ø Length :
Besides commercial length the bars and tubes can be supplied cut to length according to customer ’ s specifications.
Ø Remark :
Cylinder tubes suitable for honing can be supplied on request. Commercial lengths or cut to customers’ specifications.
Steel Cold Finish(Hard)(BK) Cold Drawn and stress-relieved(BK+S) Hardness HB
Tensile Strength ( N/mm2 ) Elongation 5 % Tensile Strength (N/mm2) Yield N/mm2 Elongation 5 %  
CK20 >= 550 >= 8 >=520 >=375 >=12 175
CK35 >=650 >=5 >=600 >=520 >=12 190
CK45 >= 640 >= 5 >=600 >=520 >=15 207
16Mn >= 640 >= 5 >=600 >=510 >=15 190
27SiMn >= 840 >= 5 >=800 >=720 >=10 230
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Structure Pipe ASTM A53/A53M
Product Description
Products: Structure Pipe
Standard: ASTM A53/A53M
Steel grade: A, B
Size: OD (6-610 mm) x WT (1-50mm)
Application: Conveying water, petroleum, gas and other common fluids.
Grade Chemical Composition (%) Max.
C Mn P S Cu Ni Cr Mo V
A 0.25 0.95 0.05 0.045 0.40 0.40 0.40 0.15 0.08
B 0.30 1.20 0.05 0.045 0.40 0.40 0.40 0.15 0.08
Mechanical Properties
Grade Chemical Composition (%) Max.
Tensile Strength(Mpa) Yield Strength(Mpa) Elongation (%)
A 330 205 Check the table.
B 415 240
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Carbon Steel Seamless Pipe ASTM A106
Product Description
Standard: ASTM A106/ASME SA106
Steel grade: A, B, C
Size: OD (6-610MM) x WT (1-50MM)
Application: For high temperature service or Conveying water, petroleum, gas.
Chemical Composition.
Grade C(Max) Mn Si(Min) Cu(Max) Ni(Max) Cr(Max) Mo(Max) V(Max) P(Max) S(Max)
A 0.25 0.27~0.93 0.10 0.40 0.40 0.40 0.15 0.08 0.035 0.035
B 0.30 0.29~1.06 0.10 0.40 0.40 0.40 0.15 0.08 0.035 0.035
C 0.35 0.29~1.06 0.10 0.40 0.40 0.40 0.15 0.08 0.035 0.035
Mechanical Properties
Grade Tensile Strength (Mpa), Min. Yield Strength (Mpa), Min. Elongation (%)
A 330 205 Check the table
B 415 240
C 485 275
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Cold Drawn Seamless Steel Tube ASTM A179
Standard: ASTM A179/ASME SA179
Size: OD (10-76mm) x WT (1.5-5mm)
Application: Heat exchanger tube, condenser tube, etc.
GradeA Chemical Composition (%) Mechanical Properties
C Mn P.S; Tensile Strength(Mpa) Yield Strength(Mpa) Elongation (%)
ASTMA179 0.06~0.18 0.27~0.63 Max 0.035 Min 325 Min 180 Min 35
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Cold Drawn Seamless Steel Tube ASTM A192
Product Description
Standard: ASTM A192/ASME SA192
Size: OD (10-219mm) x WT (1-40mm)
Application: For manufacturing high pressure boiler, superheater, etc.
Grade Chemical Composition (%) Mechanical Properties (Mpa)
ASTMA192ASTMA192 C Mn Si P, S Tensile Strength Yield Strength Elongation
0.06~0.18 0.27~0.63 Max 0.25 Max 0.035 Min 325 Min 180 Min 35%
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Cold Drawn Seamless Steel Tube ASTM A210
Product Description
Standard: ASTM A210/ASME SA210
Steel Grade: A1, C
Size: OD (10-219mm) x WT (1-40mm)
Application: For manufacturing wall panel, economizer, reheater, superheater and steam pipeline of boilers
Grade C(Max) Mn Si(Min) P(Max) S(Max)
A1 0.27 Max.0.93 0.10 0.035 0.035
C 0.35 0.29~1.06 0.10 0.035 0.035
Mechanical Properties
Grade Tensile Strength(Mpa) Yield Strength(Mpa) Elongation (%)
A1 ≥ 415 ≥ 255 ≥ 30
C ≥ 485 ≥ 275 ≥ 30
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Steel Tubes for Precision Applications
Product Description
Standard: EN 10305-1 or DIN 2391
Steel grade: E215, E235, E355, E255, E410
Size: OD (4-190mm) x WT (0.5-15mm)
Application: Used in hydraulic system, automobile, locomotive and military industry.
Chemical Composition
Grade C Si Mn P S Al Min V Others
E215 ≤0.1 ≤0,05 <0.70 ≤0,025 ≤0,025 0,025 - -
E235 ≤0,17 ≤0,17 <1,20 ≤0,025 ≤0,025 - - -
E355 ≤0,22 ≤0,55 <1,60 ≤0,025 ≤0,025 - - -
E255 ≤0,21 ≤0,35 0,40-1,10 ≤0,025 ≤0,025 - - -
E410 0,16-0,22 0,10-0,50 1,30-1,70 ≤0.03 ≤0.035 0,010-0,060 0,08-0,15 Nb<0,07; Ti<0,05
Mechanical Properties
Grade Mechanical properties (Min.)Yield Strength (Mpa), Min.Elongation (%)
+C +LC +SR +A +N
R m A% R m A% R m R eH A% R m A% R m R eH A%
MPa MPa MPa MPa MPa Mpa Mpa
E215 430 8 380 12 380 280 16 280 30 290 - 430 215 30
E235 480 6 420 10 420 350 16 315 25 340 - 480 235 25
E355 640 4 580 7 580 450 10 450 22 490 - 630 355 22
E255 580 5 520 8 520 375 12 390 21 440 - 570 255 21
E410 750 4 620 8 690 590 12 520 22 550- 700 410 22
 
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Cold Drawn Steel Tube
Product Description
Cold drawn steel tube, Cold drawn seamless tube
Standard: ASTM A179, ASTM A192, ASTM A210, ASTM A213, ASTM A519, ASTM A106, DIN 17175, DIN 2391, EN10305
Size: OD (10-76mm) x WT (1.5-10mm)

Application: Fluid Pipe, Structure Pipe, Boiler steel tube, Boiler steel pipe, Sanitary Steel Pipe, Automobile pipe,
Conveying water, petroleum, gas and other common fluids.
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Cold Drawn Seamless Steel Tube DIN17175
Product Description
Standard: DIN 17175
Steel Grade: St35.8, St45.8, 15Mo3, 13CrMo44, 10CrMo910 etc.
Size: OD(6.35-76.20mm) x WT (0.71-3.40mm)
Application: For Elevated Temperatures; For the pipelines of boiler industry.
Grade Chemical Composition %Si(Min)P(Max)S(Max)
C Si Mn P , S Cr Mo
St35.8 ≤0.17 0.10 ~ 0.35 0.40 ~ 0.80 ≤0.030 / /
St45.8 ≤0.21 0.1 ~ 0.35 0.40 ~ 1.20 ≤0.030 / /
15Mo3 0.12 ~ 0.20 0.1 ~ 0.35 0.40 ~ 0.80 ≤0.030 / 0.25 ~ 0.35
13CrMo44 0.10 ~ 0.18 0.1 ~ 0.35 0.40 ~ 0.70 ≤0.030 0.70 ~ 1.10 0.45 ~ 0.65
10CrMo910 0.08 ~ 0.15 ≤0.50 0.40 ~ 0.70 ≤0.030 2.00 ~ 2.50 0.90 ~ 1.20
Mechanical Properties
Grade Tensile Strength (Mpa) Yield strength (Mpa) Elongation %
St35.8 360 ~ 480 ≥235 ≥25
St45.8 410 ~ 530 ≥255 ≥21
15Mo3 450 ~ 600 ≥270 ≥20
13CrMo44 440~ 590 ≥290 ≥20
0CrMo910 450 ~ 600 ≥280 ≥18
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Carbon Steel Seamless Pipe EN10297 & Hollow Pipe
Standard: EN10297-1
Steel Grade: E235, E275, E315, E355, ; DIN 1629 ST37, ST52, ST52.3
Size: OD (21.3-219mm) x WT (2-60mm)
Application: Mechanical use.
Grade Chemical Composition
C Si Mn P S
E235 ≤0.17 ≤0.35 ≤1.20 ≤0.030 ≤0.035
E275 ≤0.21 ≤0.35 ≤1.40 ≤0.030 ≤0.035
E315 ≤0.21 ≤0.30 ≤1.50 ≤0.030 ≤0.035
E355 ≤0.22 ≤0.55 ≤1.60 ≤0.030 ≤0.035
Mechanical Properties:
Grade Tensile strength Mpa Yield strength Mpa Elongation %
E235 ≥360 ≥235 ≥25
E275 ≥410 ≥275 ≥22
E315 ≥450 ≥315 ≥21
13CrMo44 ≥490 ≥355 ≥20
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