DIN 2391 St 37.4 Black Phosphated Seamless Steel Tube for Hydraulic

• Customization: Available
• Type: Seamless
• Technique: Cold Drawn
• Material: Carbon Steel
• Usage: Hydraulic/Automobile Pipe
• Section Shape: Round
• Standard: DIN 2391, En10305-1, En10305-4, BS 6323, ISO 8535
• Delivery Condition: Bk, Gbk, Bkw, Bks or Nbk
• Steel Grade: St35, St37, St37.4, E235, E355, St45, St52.4,etc
• Certificate: ISO 9001 Ts16949
• Secondary or Not: Non-Secondary
• Application: Automotive Industry, Hydraulic System, Other Indus
• Transport Package: Plywood Box or Budles
• Specification: OD2mm -60mm
• Trademark: CW
• Origin: China
• HS Code: 7304319000

Product Description

EN 10305-4 black phosphated cold drawn seamless tube for hydraulic
High Precision Seamless Steel Tube for Automotive Industry and Hydraulic Application

Standard	Material Chemical Composition (%)									Tensile strength Rm (Mpa)	Yield Strength Reh (Mpa) Min	A Elongation(%) Min
	Steel Grade	Material Number	C	Si	Mn	P	S	Cr	Mo
DIN1629	ST37	1.0254	≤ 0.17	≤ 0.55	≤1.60	≤0.04	≤0.04	-	-	350-480	235	25
	ST44	1.0258	≤ 0.21	≤ 0.55	≤1.60	≤0.04	≤0.04	-	-	420-550	275	21
	ST52	1.0421	≤  0.22	≤ 0.55	≤1.60	≤0.04	≤0.035	-	-	550-650	355	22
DIN1630	ST37.4	1.0255	≤ 0.17	≤ 0.35	≥0.035	≤0.04	≤0.04	-	-	350-480	235	25
	ST44.4	1.0257	≤ 0.21	≤ 0.35	≥0.04	≤0.04	≤0.04	-	-	420-550	275	21
	ST52.4	1.0281	≤ 0.22	≤ 0.55	≤1.60	≤0.04	≤0.035	-	-	550-650	355	22

	Material Chemical Composition (%)
Standard	Steel Grade	Material Number	C	Si	Mn	P	S	Cr	Mo
DIN 2391	ST35	1.0308	<= 0.17	<= 0.35	>=0.04	<=0.025	<=0.025	-	-
	ST45	1.0408	<= 0.21	<= 0.35	>=0.04	<=0.025	<=0.025	-	-
	ST52	1.058	<= 0.22	<= 0.55	<=1.60	<=0.025	<=0.025	-	-
	BK		BKW		BKS			GBK
Steel Grade	Rm Tensile Strength  (Mpa) Min	A Elongation(%) Min	Rm Tensile Strength (Mpa) Min	A Elongation(%) Min	Rm Tensile Strength (Mpa) Min	Rel Yield Strength(Mpa) Min	A             Elongation  (%) Min	Rm Tensile Strength (Mpa)Min	A Elongation (%)Min
ST35	480	6	420	10	420	315	14	315	25
ST45	580	5	520	8	520	375	12	390	21
ST52	640	4	580	7	580	420	10	490	22

Standard	Steel Grade	Material Number	C	Si	Mn	P	S	Cr	Mo
EN10305-1 EN10305-4	E235	1.0308	<= 0.17	<= 0.35	>=0.04	<=0.025	<=0.025	-	-
	E255	1.0408	<= 0.21	<= 0.35	>=0.04	<=0.025	<=0.025	-	-
	E355	1.058	<= 0.22	<= 0.55	<=1.60	<=0.025	<=0.025	-	-

Steel Grade	(+C)		(+LC)		(+SR)			(+A)		(+N)
	Rm Tensile Strength  (Mpa) Min	A Elongation(%) Min	Rm Tensile Strength (Mpa) Min	A Elongation(%) Min	Rm Tensile Strength (Mpa) Min	Rel Yield Strength(Mpa) Min	A             Elongation  (%) Min	Rm Tensile Strength (Mpa)Min	A Elongation (%)Min	Rm Tensile Strength (Mpa)	Rel Yield Strength  (Mpa) Min	A Elongation (%) Min
E235	480	6	420	10	420	350	16	315	25	340-480	235	25
E255	580	5	520	8	520	375	12	390	21	440-570	255	21
E355	640	4	580	7	580	450	10	450	22	490-630	355	22