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Grade St52
Germany W-Nr. 1.0580
Corresponding Standard DIN 2391-2-1994
Seamless Precision Steel Tubes; Technical Delivery Conditions
Classification Carbon Steel
St52 Chemical Element Composition Content (%)
Component C Si Mn P S Ti V Nb More
Minimum Value - - - - - - - - Nb+Ti+V≤0.05
Maximum Value 0.22 0.55 1.6 0.025 0.025 0.03 0.05 0.03
St52 Mechanical Properties
product Mark
Heat Treatment or Condition
Tensile Strength
σb
Mpa 		Yield Point
σs
Mpa 		Elongation or Extension Rate
δ
%
Seamless steel pipe St52 BK Cold Finishing (Hard) BK ≥640 ≥4
Seamless steel pipe St52 BKW Cold Finishing (Soft) BKW ≥580 ≥7
Seamless steel pipe St52 BKS Cold Finishing and Stress Relief BKS ≥580 ≥420 ≥10
Seamless steel pipe St52 GBK Annealing GBK ≥490 ≥22
Seamless steel pipe St52 St35 Normalizing NSK 490~630 ≥355 ≥22
Approximate Comparison Table High-Quality Carbon Structural Steel
China United States International Organization for Standardization Germany France European Standard Russia Sweden United Kingdom
GB ASTM ISO DIN EN/DIN W-Nr. NF EN/NF EN Numerical Grade GOST SS BS EN/BS
Q390C Gr.65 Fe590 E355
St52
St52-3 		1.0060 E335
ES355
TS-47a
TU526 		E355 1.0580 St6sp 1650 CEW5
CFS5
E335
ERW5NKM
ERW5NZF

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