DIN 17175 St35.8/I Nbk Condition Cold Drawn Seamless Steel Pipe

• Type: Seamless
• Technique: Cold Drawn
• Material: Carbon Steel
• Surface Treatment: Black Paint, Rust Oil
• Usage: Boiler Pipe, Machinery Industry, Chemical Industry, Special Purpose
• Section Shape: Round
• Model NO.: MD-214
• Size: 1/2"--24"
• Delivery Time: 20-35 Days Ex Mill
• Loading Port: Chinese Main Port
• Certificate: ISO
• MOQ: 1 Tons
• Surface: Black Painting,Varnish Paint,Anti-Rust Oil
• Wt Tolerance: +1%~-1%
• Od Tolerance: +1%~-1%
• Process Method: Cold Drawn
• Length: Fixed:3.0,5.8,5.85,5.9,6.0,11.8,12.0;Random Length
• Transport Package: Export Standard Sea-Worthy Packing
• Specification: according to the requirment
• Trademark: KINGMETAL
• Origin: China

Product Description

Product Description

 DIN 17175 ST35.8/I NBK condition Cold drawn seamless steel pipe 

applies to seamless tubs including tubes for headers of heat-resistant steels according to standard which are used in the construction of boilers, pipe-lines, pressure vessels and equipment for service up to 600 °C and simultaneous high pressures, where the total stress and the relevant scaling conditions can raise or lower the temperature limit.

Manufacturing process

• Tubes to this standard shall be manufactured by hot or cold rolling, hot pressing, hot or cold drawing
• The steels used for tubes shall be made by the oxygen blowing process, the open hearth furnace or the electric furnace.
• All steels shall be killed.

Chemical Composition

Standard	Grade	Chemical Components (%)
		C	Si	Mn	P	S	Mo	Cr
DIN17175	St 35.8	≤0.17	0.10-0.35	0.40-0.80	≤0.040	≤0.040	/	/
	St 45.8	≤0.17	0.10-0.35	0.40-0.80	≤0.040	≤0.040	/	/
	15Mo3	0.12-0.20	0.10-0.35	0.40-0.80	≤0.035	≤0.035	0.25-0.35	/
	13CrMo44	0.10-0.18	0.10-0.35	0.40-0.70	≤0.035	≤0.035	0.45-0.65	0.70-1.10
	10CrMo910	0.08-0.15	≤0.50	0.40-0.70	≤0.035	≤0.035	0.90-1.20	2.0-2.50

Delivery Conditions

The tubes shall be supplied suitably heat treated over their entire length. The following heat treatment shall be used, depending on the type of steel:

• Normalizing
• Subcritical annealing
• Hardening and tempering with continuous cooling from the hardening temperature and subsequent tempering.
• Hardening and tempering with isothermal transformation.

 

Mechanical Properties

Standard	Grade	Mechanical properties
		Tensile Strength (Mpa)	Yield Strength (Mpa)	Elongation (%)
DIN17175	St 35.8	360-480	≥235	≥25
	St 45.8	410-530	≥255	≥21
	15Mo3	450-600	≥270	≥22
	13CrMo44	440-580	≥290	≥22
	10CrMo910	450-600	≥280	≥20

 

Description Name: DIN 17175 seamless boiler tubes, DIN17175 ST35.8 Boiler tubes, DIN17175 ST45.8 Boiler tubes, DIN17175 15Mo3 seamless tubes, DIN17175 13CrMo44 seamless tubes, DIN17175 10CrMo910 Seamless tubes, DIN17175 Seamless tubes.

Size: 19mm-350mm

W.T.: 1.5mm-50mm

Shape: Round

Production Type: Cold drawn or Hot rolled

Length: Single random length/ Double random length or as customer's actual request max length is 10m

Grade: ST35.8, ST45.8, 15Mo3, 13CrMo44, 10CrMo910

Testing

• Tensile test
• Notch impact/bending test
• Ring test
• Non-destructive test
• Visual inspection of tube surface
• Gauging
• Leakage test
• Grade identification test
• Hot tensile test

Marking

• the manufacturer's name or trade mark;
• the specified dimensions;
• the number of this European Standard;
• the steel name or number;
• the cast number;
• the delivery condition;
• Others information by customer's

Note:

• Mill test certificates will be issued according to EN10204.3
• The tubes Shall be Seamless cold drawn or hot rolled.

Protection and Packing:

• Packed in wooden box or bundles protected with plastic paper, and suitably protected for sea-worthily delivery or as requested.
• The tubes shall be delivered with a temporary corrosion protection. The type of protection shall be at the discretion of the manufacturer

Application:

For high middle, low pressure boiler and pressure purpose

Surface treatment:

Antirust oil-dip, Varnish, Passivation, Phosphating, Shot Blasting