St 45-8 Steel Pipe Material Dimensions Tolerance and Fields of Use

 St 45-8 grades according to DIN 17175 are most often produced into seamless tubes by hot or cold working. St 45-8 seamless pipe is a low carbon steel pipe with good formability, and is also called cs pipe or ms pipe in the industry. St 45-8 pipe has poor hardness, but its surface hardness can be improved by carburizing process. St 45-8 seamless pipe exhibits good mechanical properties in a high temperature environment of 600 °C, so it is also a kind of thermal strength steel.

DIN 17175 Grade St 45-8 Properties

Carbon	Silicon	Manganese	Phosphorous	Sulphur	Molybdenum	Nickel	Chromium	Copper	Others
max 0.21	0.10-0.35	0.40-1.20	0.04	0.04	–	–	–	–	–

DIN 17175 Grade St 45-8 Mechanical Properties

Yield Strength		Tensile Strength			Elongation A5 min
MPa min	ksi min	MPa min	MPa min	ksi min	Percentage
		410	530	–	21

DIN 17175 Grade St 45-8 Equivalent Designation

DIN	BS	NFA	ASTM
DIN 17175 Grade St 45-8	NFA A 49-213 Grade TU 42-c	ASTM A106 Grade B	ASME A106 Grade B

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%
			WT ＞ 0.11OD		± 10%

We can provide St 45-8 seamless pipe with outer diameter size range mostly between 20 ~ 711 mm, wall thickness range between 3 ~ 60 mm, and its normal length is 5 ~ 12m. As for the surface treatment of the pipe, such as Shot blasting, pickling, black phosphating, passivation, etc., we can provide according to the specific needs of customers, and also support customization in size.

St 45-8 seamless pipe is very versatile, cold processed St 45-8 pipe can be used in agriculture, manufacturing industry, oil and gas and other industries, hot processed St 45-8 pipe can be used in pharmaceuticals, chemicals, water processing and food handling industries.

From:http://boilersteelpipe.com/pro/smls/st-45-8-steel-pipe-material-dimensions-tolerance-and-fields-of-use.html