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DIN EN 10305 E255 high precision Carbon Steel tube for gas spring

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DIN EN 10305 E255 high precision Carbon Steel tube for gas spring

Alloy seamless steel tube with high performance,because high content of Cr material is included .

Brand:
RAY STEEL TUBE
Material:
10#(ST35.8),20# (St45.8),45#(1045)
Size:
OD:10-65 mm , Thickness: 1-8 mm
Technology:
Cold rolled

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Quantity:



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Shock absorber using high quality raw material ST35, ST37,ST37.4,ST52.4 cold rolled craft.

Main features: high precision, excellent brightness,high cleanness inner surface.

The tolearnce for OD & ID :+/-0.05mm or +/-0.03mm

Or +/-0.1 or according to your requirments

Normal standard: GB/T 3639, DIN2391,EN10305-1,EN10305-4, JIS G3445,ASTM A106 etc.

Major Steel Grade: 10#,20#,45#,16Mn,ST35,ST45,ST52,ST34.4,ST52.4,E235,E355 etc.

Delivery Condition: NBK(+N),BK(+C), GBK(+A),BKW(+LC),BKS(+SR)

Application: It is used for hydraulic and pneumatic pressure lines, automotive fuel lines and other usages which have high requirements for size precision , surface cleaness, tensile strength, mecahnical peformance and other special requirements.

Dimension tolerance comparision Chart
Outside Diameter	GB/T 3639	DIN2391(EN10305)	RAY steel tube standard	Special standard
6-30mm	+/-0.1 mm	+/-0.08 mm	+/-0.05 mm	+/-0.03 mm
31-40mm	+/-0.15 mm	+/-0.15 mm	+/-0.05 mm	+/-0.03 mm
41-50mm	+/-0.20 mm	+/-0.20 mm	+/-0.05 mm	+/-0.03 mm
51-60mm	+/-0.25 mm	+/-0.25 mm	+/-0.08 mm	+/-0.03 mm
61-65mm	+/-0.30 mm	+/-0.30 mm	+/-0.10 mm	+/-0.05 mm
Thickness	+/-0.12 mm	+/-0.10 mm	+/-0.05 mm	+/-0.03 mm

Chemical composition comparison Sheet:

Steel Grade	C	Si	Mn	S	P	Cr	Ni	Cu
10	0.08-0.13	0.15-0.35	0.30-0.60	≤0.030	≤0.030	≤0.20	≤0.25	≤0.25
1010	0.08-0.13	0.15-0.35	0.30-0.60	≤0.050	≤0.040	≤0.20	≤0.25	≤0.25
STKM11A	≤0.12	≤0.35	≤0.60	≤0.040	≤0.040
S10C	0.08-0.13	0.15-0.35	0.30-0.60	≤0.030	≤0.030	≤0.20	≤0.20	≤0.30
DC011.0330	≤0.12		≤0.60	≤0.045	≤0.045
C10C1.0214	0.08-0.12	≤0.10	0.30-0.50	≤0.025	≤0.025	AL0.020~0.060
Гост10	0.07-0.14	0.17-0.37	0.35-0.65	≤0.035	≤0.040	≤0.15
A106 Gr.A	≤0.25	≤0.10	0.27-0.93	≤0.035	≤0.035	≤0.40	≤0.40	≤0.40
St37	≤0.17	0.17-0.37	0.35-0.65	≤0.020	≤0.025	≤0.25	≤0.25	≤0.20
St35	≤0.17	≤0.35	≤0.40	≤0.025	≤0.025
E215	≤0.10	≤0.05	0.7	≤0.025	≤0.025
20	0.17-0.23	0.17-0.37	0.35-0.65	≤0.035	≤0.035	≤0.25	≤0.30
STKM12A	≤0.20	≤0.35	≤0.60	≤0.20	≤0.040	≤0.040
STKM12B
STKM12C
STKM13A	≤0.25	≤0.35	0.30-0.90	≤0.20	≤0.040	≤0.040
STKM13B
STKM13C
1020	0.18-0.23		0.30-0.60	≤0.050	≤0.040
S20C	0.18-0.23	0.15-0.35	0.30-0.60	≤0.030	≤0.030	≤0.20	≤0.20	≤0.20
C22 1.0402	0.17-0.24	≤0.40	0.40-0.70	≤0.045	≤0.045	≤0.40	≤0.40
C20C 1.0411	0.18-0.22	≤0.10	0.7-0.9	≤0.025	≤0.025
Гост 20	0.17-0.24	0.17-0.37	0.35-0.65	≤0.035	≤0.040	≤0.025	≤0.030	≤0.030
A106Gr.B	≤0.25	≤0.10	0.29-1.06	≤0.035	≤0.035	≤0.40	≤0.40	≤0.40
A53.B	≤0.30		≤1.2	≤0.045	≤0.05	≤0.40	≤0.40
St45	≤0.21	≤0.35	≥0.40	≤0.025	≤0.025
E235	0.17-0.22	≤0.35	≤0.40	≤0.025	≤0.025
45	0.42-0.50	0.17-0.37	0.50-0.80	≤0.035	≤0.035	≤0.25	≤0.25	≤0.25
1045	0.43-0.50	0.17-0.37	0.50-0.80	≤0.045	≤0.045	≤0.40	≤0.40	≤0.10
C45 1.0503	0.42-0.50	≤0.40	0.50-0.80	≤0.045	≤0.045	≤0.40	≤0.40	≤0.10
Гос т 45	0.42-0.50	0.17-0.37	0.50-0.80	≤0.035	≤0.040	≤0.25	≤0.30	≤0.30
CK45	0.42-0.50	0.17-0.37	0.50-0.80	≤0.020	≤0.025	≤0.25	≤0.25	≤0.20

Mechanical performance parameter:

Steel Grade	Tensile Strength	Yield strength	Elongation	Hardness （BK)
	Mpa	Mpa	%	HB
1010	≥335	≥205	≥31	≤137
STKM 11A	≥295	/	≥35
S10C	≥335	≥205	≥31	≤137
A106 Gr.A	≥330	≥205	≥35
St35.8	≥360	≥235	≥25
St37	≥335	≥205	≥31
St35	≥420	≥315	≥8
E215	≥430		≥8
A53.B	≥415	≥240	≥20
20#	≥410	≥245	≥25	≤156
E235	≥480	≥235	≥25
1020	≥410	≥245	≥25	≤156
A106 Gr.B	≥415	≥240	≥25
St45	≥580		≥5
E235	≥480		≥8
S20C	≥410	≥245	≥25	≤156
STKM12A	≥345	≥175	≥35
STKM12B	≥390	≥275	≥25
STKM12C	≥470	≥355	≥20
STKM13A	≥375	≥215	≥30
STKM13B	≥440	≥305	≥20
STKM13C	≥510	≥380	≥15
45#	≥600	≥355	≥16	≤229
CK45	≥590	≥345	≥21	≤230
C45 1.0503	≥600	≥355	≥16	≤22