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St37 Seamless Tube 88.9mm Diameter

St37 material seamless tube specification:OD:13 7mm-323 8mm WT:2mm-85mmLength:6

Product Introduction

St37 material seamless tube specification:
OD: 13.7mm-323.8mm
WT: 2mm-85mm
Length: 6m-12m or as required
Application: Pipeline steel pipe, vessel steel pipe, fluid pipe for low&medium pressure boiler
Supplementary Technology:
Tensile test, flattening test, leak tightness test, surface inspection, product analysis. Beveled end, plain end, varnished, or adding plastic caps as per customer’s requirements
Surface: Bared or painted, galvanized or with oiled or client option.
Delivery state: Hot Rolled, Cold Drawn
Steel Grade: St37, St44, St52

DIN 1629 seamless pipes standard includes 3 basic steel grades (ST37, ST44, ST52.), this standard specifies the Seamless Circular Tubes of Non Alloys Steels that are used in construction of chemical plant, pressure vessels, pipe system and general mechanical and engineering purposes. Din 1629 seamless steel tubes and pipes are suitable for gas fusion welding, arc welding, flash butt welding, electric pressure welding and gas pressure welding.

DIN 1629 Steel Pipe Chemical Composition:

Chemical Composition(%)
Steel Grade	C	Si	Mn	P	S
St37	≤0.17	-	-	≤0.035	≤0.035
St44	≤0.21	-	-	≤0.035	≤0.035
St52.0	≤0.22	≤0.55	≤1.60	≤0.035	≤0.035

DIN 1629 Steel Pipe Mechanical Property:

Mechanical Properties
Steel Grade	Tensile strength(Mpa)	Yield point(Mpa)	Elongation(%)L	Elongation(%)T
St37	350-480	≥235	≥25	≥23
St44	420-550	≥275	≥21	≥19
St52.0	500-650	≥355	≥21	≥19

DIN 1629 Steel Pipe Equivalent Steel Grade:

DIN 1629	EN	BS NFA 49.210/49.112	ASTM 53
Grade St 37	EN 10216.1Grade P235 T1	Grade TU 37 B TU E 220 A	Grade A
Grade St 44	EN 10216.1Grade P275T1	Grade TU 42 B TU E 235 A	Grade B
Grade St 52-0	EN 10216-3Grade P355N	NFA Grade P355N	ASME SA 381 Grade Y 52

Elevated Temperature Upper Yield Stress Values Of DIN 1629 Steel Pipe

Steel Grade	Yield stress value by working temperature(Thickness increasing)
Steel Grade	50℃	200℃	250℃	300℃
St 37	235-215	185-170	165-150	140-130
St 44	275-255	215-200	195-180	165-155
St 52	355-335	248-230	225-210	195-185

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