steel A179 boiler pipe DIN 2458

ASTM A179 steel tube covers minimum-wall thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus. A179 Cold drawn steel pipe shall be made by the seamless process and shall be cold drawn.

Heat and product analysis shall be performed wherein steel materials shall conform to required chemical compositions of carbon, manganese, phosphorus, and sulfur.

Chemistry Composition:

C, %	Mn, %	P, %	S, %
0.06-0.18	0.27-0.63	0.035 max	0.035 max

Mechanical Properties:

Tensile Strength, MPa	Yield Strength, MPa	Elongation, %	Hardness, HRB
325 min	180 min	35 min	72 max

A179 black steel pipe minimum carbon content is 0.06%. The seamless steel tube minimum tensile strength of 325MPa, yield strength of 180MPa.The minimum elongation of A179 seamless pipe is 20%.

steel A179 boiler pipe DIN 2458 Application

A179 seamless steel pipe is widely used in industries such as petroleum, chemical, medical, food, light industry, machinery, instrument, include industrial pipeline and mechanical structure parts, etc.

Standard:ASTM A179

Delivery time :

• Promptly ( Stock) or 10-40 days (Production)
• Stock : some are Available MTC: Available

Main steel A179 boiler pipe DIN 2458.

This is an effective way of metal corrosion, the use of the main features are the following:

1. ASTM A179 cold drawn seamless pipe manufacturers with thick dense dense zinc layer covered in the cold drawn seamless tube surface, it can avoid cold drawn seamless tube matrix and any contact with the corrosion solution to protect the steel matrix from corrosion. In the general atmosphere, the surface of the zinc layer to form a layer of thin and dense zinc oxide surface, it is difficult to dissolve in water, so the steel matrix plays a protective role. If zinc oxide and other components of the atmosphere produce insoluble zinc salt, the anti-corrosion effect is more desirable.
   
2. With iron - zinc alloy layer, combined with dense, and with the unique anti-corrosion in the marine atmosphere and atmospheric atmosphere.
   
3. ASTM A179 cold drawn seamless pipe with a strong wear resistance due to the combination of solid, zinc - iron miscible.
   
4. Since zinc has good ductility, its alloy layer and steel base attached to a solid, so hot-rolled parts can be cold, rolling, drawing, bending and other molding without damage to the coating.
   
5. Hot-dip galvanized structural steel pipe, the equivalent of an annealing treatment, can effectively improve the mechanical properties of steel matrix to eliminate the steel forming welding stress, is conducive to the steel structure for turning.
   
6. The surface of cold drawn seamless pipe after hot galvanized is bright and beautiful.
   
7. Pure zinc layer is the most hot galvanized layer of galvanized layer, its nature is basically close to pure zinc, with ductility, so it is full of flexibility.

Outside Diameter & Tolerance of steel A179 boiler pipe DIN 2458

Outside Diameter, mm	Tolerance, mm
3.2≤OD＜25.4	±0.10
25.4≤OD≤38.1	±0.15
38.1＜OD＜50.8	±0.20
50.8≤OD＜63.5	±0.25
63.5≤OD＜76.2	±0.30
76.2	±0.38

Wall thickness & Tolerance of steel A179 boiler pipe DIN 2458

Outside Diamter, mm	Tolerance, %
3.2≤OD＜38.1	+20/-0
38.1≤OD≤76.2	+22/-0

• Length: 5800mm; 6000mm; 6096mm; 7315mm; 11800mm; and so on.
• Max length: 27000mm, also U bending can be offered.

DIN 2458

DIN 2458 Standard applies to the dimensions and the conventional masses per unit length of welded steel pipes according to the technical conditions of delivery as stipulated in DIN

1628 Part 1 to part 4, DIN 17172 and DIN 17177. St37.2 welded pipe also applies to other technical conditions of conditions of delivery in which reference to DIN2458 standard is made.

Chemical composition
Steel grade		Type of deoxidation (RR.fully killed)	Chemical composition, % by mass					Addition of nitrogen fixing elements (e.g.no less than 0.020% Al total)
Symbol	Material number		C	Si	N	P	S
			max			max
St 37.2	1.0037	RR	0.17	--	0.009	0.050	0.050	--

 

Mechanical property
Steel grade		Upper yield stress Reh for wall thickness in mm			Tensile N/mm2	Elongation after A5		Impact ISO V-notch test pieces at+20°C
Symbol	Material number	Up to 16	16-40	40-65		longitudinal	transverse	longitudinal	transverse
		N/mm2 min				% min		/ min
St 37.2	1.0037	235	225	215	340 to 510	17-26	---	27	--