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Home Material DIN 2391-2-1994
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Grade St30Si
Germany W-Nr. 1.0211
Corresponding Standard DIN 2391-2-1994
Seamless Precision Steel Tubes; Technical Delivery Conditions
Classification Carbon Steel
St30Si Chemical Element Composition Content (%)
Component C Si Mn P S Ti V Nb More
Minimum Value - - - - - - - - Nb+Ti+V≤0.05
Maximum Value 0.1 0.3 0.55 0.025 0.025 0.03 0.05 0.03
St30Si Mechanical Properties
product Mark
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
%
Seamless steel pipe St30Si BK Cold Finishing (Hard) BK ≥430 ≥8
Seamless steel pipe St30Si BKW Cold Finishing (Soft) BKW ≥380 ≥12
Seamless steel pipe St30Si BKS Cold Finishing and Stress Relief BKS ≥380 ≥280 ≥16
Seamless steel pipe St30Si GBK Annealing GBK ≥280 ≥30
Seamless steel pipe St30Si NSK Normalizing NSK 290~420 ≥215 ≥30

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