Seamless Steel H8 H9 DIN2391 Ck45 45# Cylinder Honed Tube

• Type: Seamless
• Technique: Cold Drawn
• Material: Carbon Steel
• Surface Treatment: Honed/Smooth
• Usage: Hydraulic/Automobile Pipe
• Section Shape: Round
• Model NO.: EYHT
• Thickness: 0.1 - 200 mm
• Length: 2-12m
• Delivery Condition: Bk, Bk+S, Gbk, Nbk
• Roughness: 0.2-0.4 U
• Straightness: ≤ 0.5/1000
• Transport Package: Export Standard Packing
• Specification: 5 - 500 mm
• Trademark: Kingmetal
• Origin: China (Mainland)
• HS Code: 7304399000
• Production Capacity: 5000 Ton/ Month

Product Description

Standard & Material	Carbon Steel	ASTM A519 Standard	MT1010, MT1020, 1008, 1010, 1018, 1020, 1025, 1030, 1045, 1518
		JIS G3445 Standard	STKM11A  STKM12A  STKM12B  STKM12C   STKM13A  STKM13B STKM13C   STKM14A  STKM14B  STKM14C  STKM15A  STKM15C STKM16A  STKM16C   STKM17A   STKM17C  STKM18A  STKM18B STKM18C   STKM19A  STKM19C  STKM20A
		JIS G3473 Standard	STC370, STC440, STC510A, STC510, STC540, STC590A, STC590B
		DIN 2391 Standard	St 35, St45, St52
		EN 10297-1 Standard	E235, E275, E315, E355, E470
		EN 10305-1 Standard	E215, E235, E355
		EN 10305-4 Standard	E215, E235, E355
		BS 6323-3 Standard	HFS 3, HFS 4, HFS 5, HFS 8
		NF A49-311	TU 37-b, TU 52-b, TU 56-b, TU XC35
	Alloy Steel	ASTM A519 Standard	1345, 3140, 4130, 4135, 4140, 4150, 4320, 4340, 5120, 5130
		JIS G3429 Standard	STH11, 12 STH21, 122 STH31
		JIS G3441 Standard	SCR420TK, SCM415TK, SCM418TK, SCM420TK, SCM430TK, SCM440TK

Designation	Symbol	Description
Cold finished (hard)	BK	Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation.
Cold finished (soft)	BKW	The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding).
Cold finished and stress-relieved	BKS	Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.
Annealed	GBK	The last cold forming process is followed by annealing in a controlled atmosphere.
Normalized	NBK	The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.

Delivery Condition	Cold Finished (Hard) (BK)		Cold Drawn and Stress-Relieved (BK+S)			Hardness HB
Parameters	T.S. Rm N/mm2	Elongation A5%	T.S. Rm N/mm2	Y.S. ReH N/mm2	Elongation A5%
20# (A106)	≥550	≥8	≥520	≥470	≥12	175
45# (CK45)	≥650	≥5	≥600	≥520	≥12	207
16Mn (ST52,E355)	≥640	≥5	≥600	≥520	≥15	190
25Mn	≥640	≥5	≥600	≥510	≥15	195
27SiMn	≥840	≥5	≥800	≥720	≥10	230

Steel Grade	Chemical Composition (%)
	C	Si	Mn	P	S	Cr
				≤
St45	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0.035	0.250
ST52(E355)	≤0.22	≤0.55	≤1.6	0.025	0.025	0.25
SAE1026	0.22-0.28	0.15-0.35	0.60-0.90	0.040	0.050	/
27SiMn	0.24-0.32	1.10-1.40	1.10-1.40	0.035	0.035	0.300
20#	0.17-0.24	0.17-0.37	0.35-0.65	0.035	0.035	0.250