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DIN 2391 St30Al
DIN 2391 St30Si
DIN 2391 St35
DIN 2391 St45
DIN 2391 St52
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DIN 2391 Seamless precision steel tubes
Standard: DIN 2391
Equivalent Standard: EN 10305-1, EN 10305-4, ASTM A519, NF 699, GOST 9567-75, NBR 8476, BS 6323 Part 4, NF A 49-330-85, BS 6323-4, NF A 49-310, UNI 6403
Material: St30Si, 1.0211
Equivalent Materials: S215GSiT
Chemistry Composition
C, %
Si, %
Mn, %
P, %
S, %
0.10 max
0.30 max
0.55 max
0.025 max
0.025 max
Mechanical Properties
Tensile Strength , MPa
Yield Strength, MPa
Elongation, %
Delivery Condition
430 min
-
8 min
BK
380 min
-
12 min
BKW
380 min
280 min
16 min
BKS
280 min
-
30 min
GBK
290-420
215 min
30 min
NBK
DIN 2391 standard specifies technical delivery conditions for cold finished seamless precision steel tubes of the dimensions listed in DIN 2391 Part 1, which are made from the steel grades of St30Si (1.0211), St30Al (1.0212), St35 (1.0308), St45 (1.0408), St52 (1.0580). Such tubes are mainly used where accuracy to size and, possibly, a small wall thickness, a particular surface condition and specific mechanical properties are required.
Manufacture: tubes to DIN 2391 shall be manufactured by cold rolled or cold drawn, hot rolled.
Delivery Condition: Cold finished (hard) as BK, cold finished (soft) as BKW, cold finished and stress-relieved as BKS, annealed as GBK, normalized as NBK.
Inspection & Test: chemistry composition analysis, tensile test, flattening test, flaring test, NDT, surface inspection and dimension check.
Length: 5800mm; 6000mm; 10000mm; 11800mm; and so on.
Further process: cutting, deformation.
Keyword: precision steel tube, DIN 2391, DIN 2391-2, DIN 2391 Part II, precision steel pipe, cng tube, HPL Tube
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