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Standards And Grades:

ASTM A500, ASTM A501, ASTM A252 GR.A, GR.B, GR.C

EN10210, EN10219, EN 10255 S235JRH, S275J0H, S275J2H, S355J0H, S355J2H, S355NH, S460NH

JIS G3466 STKR400, STKR490

AS/NZS 1163 C250, C250LO, C350, C350LO, C450, C450LO

GB/T 3091, GB/T 6728 Q235B, Q355B, Q420B, Q460B, Q550B, Q690B

OD:(SHS)20*20-1200*1200mm WT: 1.3mm-50mm
OD:(RHS)20*30-1200*1500mm WT:1.2-50mm
OD:(CHS)20-660mm WT:1.3-16mm
Length:4m, 6m, 12m or as your required

Brand:LEFIN STEEL

Chemical Composition

Chemical composition(cast analysis)%
Steel Grade	C	Si max.	Mn	P max.	S max.
P195GH	≤0.13	0.35	≤0.70	0.025	0.020
P235GH	≤0.16	0.35	≤1.20	0.025	0.020
P265GH	≤0.20	0.40	≤1.40	0.025	0.020

Physical Requirements

Mechanical properties for wall thickness T≤16
Steel Grade	Tensile properties at room temperature
	Upper yield strength MPa	Tensile strength Mpa	Elongation %
			longitudinal	transverse
P195GH	195	320-440	27	25
P235GH	235	360-500	25	23
P265GH	265	410-570	23	21

Material and Process Characteristics

1. Material characteristics:

• Non-alloy steel: based on high-strength steel, excellent pressure resistance, suitable for normal temperature fluid transport (such as oil, natural gas).

• Stainless steel: austenitic or duplex stainless steel material, strong corrosion resistance, suitable for chemical, food processing and other corrosive environment.

2. Manufacturing process:

• Welded steel pipe adopts electric welding or submerged arc welding process, and the surface coating can enhance corrosion resistance.

• Seamless steel pipe is made by perforating process, no welds, overall strength is higher, suitable for high pressure scenarios.

Core Performance Advantages

1. Mechanical properties:

• High compressive strength: seamless steel pipes can withstand extreme pressure (such as oil pipelines).

• Impact resistance: TR2 steel pipe needs to pass impact test to ensure reliability in low temperature environment.

2. Corrosion resistance:

• Stainless steel welded pipe surface treatment (such as galvanizing or passivation) to extend the service life.

3. Dimensional accuracy:

• Seamless steel pipe inner and outer walls smooth, strict tolerance control, reduce fluid resistance.

Typical Application Areas

1. The energy sector:

• Transport oil, gas and water vapor (e.g. heat exchangers, boiler pipes).

2. Chemical and Pharmaceutical Industries:

• Corrosion-resistant stainless steel tube for acid-base medium transmission.

3. Construction and machinery:

• As structural support parts or mechanical parts (such as automotive, Marine parts).

4. Extreme environments:

• Pressure equipment under high or low temperature conditions (e.g. EN10217-2 and EN10217-7 application scenarios).

Selection and Purchasing Suggestions

• Material matching: Select non-alloy steel, alloy steel or stainless steel according to the use environment (temperature, corrosion).

• Standard update: Pay attention to standard version iterations (e.g. EN10217-1:2019 instead of 2002) to ensure compliance with the latest specifications.

Attachment: Comparison with Other Standards

• The difference with EN10219: EN10219 is mainly for cold-formed welded steel pipes, while EN10217 emphasizes welded pipes for pressure applications.

• Compared with ASTM standards: EN10217 pays more attention to the requirements of environmental protection and safety of materials in the European market, and some parameters are stricter than ASTM standards.

EN10217 HOLLOW SECTIONS

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