DIN 17175 Seamless Steel Tubes

DIN 17175 is the standard for "seamless steel tubes for pressure, technical delivery conditions" in the German industrial standard. The following is a detailed introduction to DIN 17175 seamless steel tubes.

This standard specifies the delivery technical conditions for seamless steel tubes that are suitable for high and normal temperature pressure, including dimensions, shapes, weights, technical requirements, test methods, inspection rules, packaging, markings and quality certificates, etc., to ensure the safe and reliable use of seamless steel tubes under pressure.

DIN 17175 seamless steel tubes are suitable for pressure-bearing pipeline systems in multiple industries, such as petrochemicals, electric power, machinery manufacturing, etc.

Photos of DIN 17175 Seamless Steel Tubes

What is a seamless pipe?

A seamless pipe is a tube that does not have any welding seam. Seamless pipes are derived from solid steel that is in sheet or bar form and is formed into a solid round shape known as “billets” which are then heated and cast over a form such as a piercing rod to create a hollow tube or shell.A seamless tube may also be known as a seamless pipe.Some seamless pipe types harden as they’re manufactured, so heat treatment after manufacturing is not required. Others do require heat treatment.

DIN 17175 Seamless Steel Tubes Specification

DIN 17175 Seamless Steel Tubes Quick Details

Manufacture	Seamless process
Out Dimensions	14mm-711mm
Wall Thickness	2mm-60mm
Length	Fixed(6m,9m,12,24m) or normal length(5-12m)
Ends	Plain End, Beveled End, Treaded

DIN 17175 Standard

This standard applies to seamless tubes 1) including tubes for headers of heat,resistant steels according to Table 1 which are used in the construction of boilers,pipelines, pressure vessels and equipment for service up to 600℃ and at simultaneous high pressures, where the to-total stress and the relevant scaling conditions can raise or lower the temperature limit.

Definition

Steels possessing good mechanical properties even under long-time stressing at high temperatures, up to 600℃,shall be regarded as being heat.resistant at high temperatures,for the purpose of this standard.

Classification

The standard covers tubes made from steel grades listed in Table 1.

The choice of the particular steel grade is at the discretion of the customer (see Section 6.2).

Manufacturing method

DIN 17175 Seamless Steel Tubes may be produced by hot rolling, cold

rolling,hot pressing, hot drawing or cold drawing.

The tube steel can be smelted in a flat furnace or an electric furnace according to

the oxygen blowing method, and all steels should be cast in a static manner.

Supply status

The DIN 17175 Seamless Steel Tubes Will be delivered through a suitable heat

treatment. heat treatment includes:
- Normalizing
- Annealing
- Tempering; from the quenching temperature, it is not cold, but then tempered
- Adjust the mass by the isothermal transformation method.

The same effective standards and reference materials

• DIN 2391, part 1 , cold drawn or cold rolled precision seamless steel: size.

• DIN 2413, Steel tube: Wall thickness resistance to internal pressure.

• DIN 2448, seamless steel pipe: size and weight.

• DIN 2915, seamless and welded steel tubes for water tube boilers.

• DIN 2917, Non-stitched steel tubes for hot steam pipes and headers : Dimensions

• DIN 17007 Part 2

• DIN 50049, material test certificate

• DIN 50115, Metal Materials Experiment: Notch Impact Toughness Test

• DIN 50125, Metallic Materials Experiment: Tensile Test, Preparation Principles

• DIN 50136, Metallic Materials Experiment: Ring-shaped flattening test of pipe

• DIN 50137, steel test: ring flaring test of pipe • DIN 50138, steel test: ring tensile test of pipe

• DIN 50140, Metallic Materials Test: Tube and Tube Tension Tests for Incompetent Adjustability Meters

• DIN 50145, Metal Materials Experiment: Tensile Test

DIN 17175 Seamless Steel Tubes Material

Chemical Compositions of DIN 17175 steel Tubes

Grade	Chemical Composition(%)
	c	Si	Mn	P	s	Ni	Fr	Mo	others
St35.8	0.17Max	0.10~0.35	0.40~0.80	0.040Max	0.040Max
St45.8	D.21Max	0.10~0.35	0.40~1.20	0.040Max	0.040Max
17Mn4	0.14~0.20	0.20~0.40	0.90~1.20	0.040Max	0.040Max		0.30Max
19Mn5	0.17~0.22	0.30~0.60	1.00~1.30	D.040Max	0.040Max		0.30Max
15Mo3	D.12~0.20	0.10~0.35	0.40~0.80	D.035Max	0.035Max			0.25~0.35
13CrMo910	0.10~0.18	0.10~0.35	D.40~0.70	D.035Max	0.035Max		0.70~1.10	0.45~0.65
10CrMo910	0.08~0.15	0.50Max	0.40~0.70	0.035Max	0.035Max		2.00~2.50	0.90~1.20
14MoV63	0.10~0.18	0.10~0.35	0.40~0.70	0.035Max	0.03SMax		0.30~0.60	0.50~0.70	V:0.22~0.32
X20CrMoV121	0.17~0.23	0.50Max	0.40~0.70	0.030Max	0.030Max	0.30~0.80	10.00~12.50	0.80~1.20	V:0.25~0.35

DIN 17175 is the German standard for "seamless steel tubes for pressure, technical delivery conditions", involving seamless steel pipes of various steel grades. The following is an analysis of the typical steel grade St35.8.

Silicon (Si): 

The content is usually 0.10% - 0.35%. Silicon in DIN 17175 Seamless Steel Tubes can enhance the strength and hardness of steel, improve the oxidation resistance and corrosion resistance of steel, and help improve the comprehensive performance of steel in St35.8.

Manganese (Mn): 

The content is about 0.40% - 0.80%. Manganese can improve the strength and toughness of steel, and has the effects of deoxidation and desulfurization, which can effectively improve the quality of steel and improve the weldability of steel.

Mechanical Properties of DIN17175 steel Tubes

Grade	Material Number	MPa or N/mm²
		Min Yield Point		Tensile Strength
		WT:16mm Max	WT:16-40mm
St35.8	1.0305	235	225	360~480
St45.8	1.0405		245	410~530
17Mn4	1.0481		275	460~580
19Mn5	1.0482		315	510~610
15Mo3	1.5415	275	275	450~600
13CrMo910	1.7335	295	295	440~590
10CrMo910	1.7380	285	285	450~600
14MoV63	1.7715	325	325	460~610
X20CrMoV121	1.4922	490	490	690~850

Tensile strength: Tensile strength is the maximum stress that a material can withstand during stretching, reflecting the material's ability to resist tensile damage. This indicator of St35.8 ensures that it will not break easily when subjected to a certain tensile force.

Yield strength: Yield strength is the stress when the material begins to produce obvious plastic deformation, which determines the maximum stress that the material can withstand under normal use, ensuring that the pipeline will not be excessively deformed under working pressure.

Dimensions Tolerance

Project	Standard		Size range		Tolerance
Outer diameter	DIN17175		Hot rolled steel pipe	OD ≤ 100mm	± 0.75%( Min ± 0.5mm )
				OD＞ 100~ 320mm	± 0.9%
			Cold drawn steel pipe OD ≤ 120mm		± 0.6%( Min ± 0.25mm )
Wall thickness	DIN17175	OD ≤ 130mm	WT ≤ 2Sn		+15%~-10%
			WT ＞ 2Sn~4Sn		+12.5%~-10%
			WT ＞ 4Sn		± 9%
		130 ＜ OD ≤ 320mm	WT ≤ 0.05OD		+17.5%~-12.5%
			0.05OD ＜ WT ≤ 0.11OD		± 12.5%

What is DIN 17175 equivalent to ASTM?

The DIN 17175 standard has various equivalents in ASTM standards for seamless tubes used in high-temperature and heat-exchanger applications. Here are a few examples:

DIN 17175 St35.8 is equivalent to ASTM A179.

DIN 17175 St45.8 is equivalent to ASTM A210.

DIN 17175 15Mo3 is equivalent to ASTM A335 P1.

DIN 17175 13CrMo44 is equivalent to ASTM A335 P12.

DIN 17175 10CrMo910 is equivalent to ASTM A335 P22.

What is the difference between ANSI and DIN ?

DIN (Deutsches Institut für Normung)

1. DIN is a German organization that stands for "Deutsches Institut für Normung," which translates to the "German Institute for Standardization."

2. DIN standards are often identified by a "DIN" prefix followed by a unique number (e.g., DIN 476 for paper sizes, DIN 912 for hex socket head cap screws).

3. DIN Pressure levels are expressed in nominal pressure (PN, Nominal Pressure), in bar, such as PN10, PN16, PN25, etc.

4. DIN standards are widely used in Germany and many other countries in Europe. They are known for their high-quality engineering and technical standards.

ANSI (American National Standards Institute)

1. ANSI is an American organization known as the "American National Standards Institute."It is the American standard system, which integrates the standards and specifications of multiple professional organizations and industry associations.

2. ANSI standards are often identified by an "ANSI" prefix followed by a unique number or by specific designations related to the standard (e.g., ANSI B16.5 for pipe flanges and flange fittings, ANSI C language standards).

3. ANSI Pressure levels are expressed in pound classes, such as Class 150, Class 300, Class 600, etc.

4. ANSI standards are widely used in the United States and, to some extent, in other countries, particularly in North America.

What is ASTM A106 DIN equivalent to?

ASTM A106 is equivalent to DIN 17175 .These standards share similar chemical compositions and mechanical properties for high-temperature applications.

Material number	EN	ASTM
1.0305  St 35.8/I	P235GH TC1 (1.0345)	A 106 Grade A
1.0305  St 35.8/III	P235GH TC2 (1.0345)	–
1.0405  St 45.8/I	P265GH TC1 (1.0425)	A 106 Grade B
1.0405  St 45.8/III	P265GH TC2 (1.0425)	–

Original material test

A thin sheet should be taken at the top end of each round or square bar ingot for a pickling test to determine if the top end is adequately cut. Ultrasonic testing can also be performed on the shrinkage hole as selected by the supplier.

Test:

Chemical composition verification test
hydrostatictest
Tensile test
Notched impact test
Yield strength test
Ring test
Nondestructive testing

DIN 17175 Seamless Steel Tubes are used in the Following Applications:

Oil and gas industry

Chemical industry

Power industry

Machinery manufacturing industry

Construction industry

DIN 17175 Seamless Steel Tubes Exported Countries

We Export DIN 17175 Seamless Steel Tubes to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc