GB/T3639 Standard Seamless Carbon Cold Rolled High Precision Steel Tube

• Customization: Available
• Type: Seamless
• Technique: Cold Rolled
• Model NO.: CRS5
• Material: Carbon Steel
• Surface Treatment: Bright Annealing,Black Phosphating,Galvanizing
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Machinery Industry, Chemical Industry
• Section Shape: Round
• Standard: GB/T3639
• Delivery Condition: Bkw, Bks, +LC, +Sr
• Steel Grade: 10/20/45/Q345b
• Secondary or Not: Non-Secondary
• Certificate: ISO 9001 Ts16949
• Application: Automotive,Hydraulic System and Precision Device
• Transport Package: Box or Bundles
• Specification: OD: 5- 250mm ID: 3- 200mm
• Trademark: CW
• Origin: China
• HS Code: 7304319000

Product Description

Detailed Photos

Standard

Standard	Material Chemical Composition (%)
	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	-	-

Standard	Material Chemical Composition (%)
	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	-	-
	ST44	1.0258	<= 0.21	<= 0.55	<=1.60	<=0.04	<=0.04	-	-
	ST52	1.0421	<= 0.22	<= 0.55	<=1.60	<=0.04	<=0.035	-	-
DIN1630	ST37.4	1.0255	<= 0.17	<= 0.35	>=0.035	<=0.04	<=0.04	-	-
	ST44.4	1.0257	<= 0.21	<= 0.35	>=0.04	<=0.04	<=0.04	-	-
	ST52.4	1.0281	<= 0.22	<= 0.55	<=1.60	<=0.04	<=0.035	-	-

Standard	Material Chemical Composition (%)
	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	-	-

Standard	Material Chemical Composition (%)
	Steel Grade	Material Number	C	Si	Mn	P	S	Cr	Mo
ASTM A519	1010	-	0.08-0.13	-	0.3-0.6	≤0.04	≤0.05	-	-
	1020	-	0.18-0.23	-	0.3-0.6	≤0.04	≤0.05	-	-
	1045	-	0.43-0.50	-	0.6-0.9	≤0.04	≤0.05	-	-
	4130	-	0.28-0.33	0.15-0.35	0.40-0.60	≤0.04	≤0.05	0.8-1.1	0.15-0.25
	4140	-	0.38-0.43	0.15-0.35	0.75-1.0	≤0.04	≤0.05	0.8-1.1	0.15-0.25

Standard	Material Chemical Composition (%)
	Steel Grade	Material Number	C	Si	Mn	P	S	Cr	Mo
JIS G3445	SKTM 12C	-	<= 0.12	<= 0.35	<= 0.60	<=0.04	<=0.04	-	-
	STKM 13C	-	<= 0.25	<= 0.35	0.3-0.9	<=0.04	<=0.04	-	-

Standard	Material Chemical Composition (%)
	Steel Grade	Material Number	C	Si	Mn	P	S	Cr	Mo
GB/T 8162 GB/T 8163 GB/T 3639	10	-	0.07-0.14	0.17-0.35	0.35-0.65	<=0.035	<=0.04	-	-
	20	-	0.17-0.23	0.17-0.37	0.35-0.65	≤0.035	≤0.035	-	-
	45	-	0.42-0.50	0.17-0.37	0.50-0.80	≤0.035	≤0.035	-	-
	Q345B	-	≤0.20	≤0.50	<=1.70	≤0.035	≤0.035	-	-

Delivery Condition: BKW, BKS, +LC, +SR
ID tolerance can minimized to +/-0.02mm
OD: 5- 250mm
ID: 3- 200mm

Equivalent Material referance:
GB	TOCT	ASTM	BS	JIS	NF	DIN
10F		1010	040A10		XC10
10	10	10,101,012	045M10	S10C	XC10	C10,CK10
20	20	1020	050A20	S20C	XC18	C22,CK22
45	45	1045	080M46	S45C	XC45	C45,CK45
30CrMo	30XM	4130	1717COS110	SCM420	30CD4
42CrMo		4140	708A42		42CD4	42CrMo4
			708M40
35CrMo	35XM	4135	708A37	SCM3	35CD4	34CrMo4

 

Manufacture Process

Application

 
1. For Vehicle (Automotive, locomotive, Construction Machinery like Concrete pump and others)

Power steering system, Shock absorber, vibration damper , engine parts and others
2. Hydraulic cylinder, Industry Jacks
3. Fitness equipment,motor casings and auto parts.

Other precision surface required devises

Packaging & Shipping

by boxes or bundles

Company Profile

Chewit International

Chewit international Located in zhangjiagang city which is along The Yangtze Golden Channel the junction of River and Coast Economic Belt. It owns an excellent geographic position, as it is close to Nanjing city in the north, adjacent to Suzhou and Wuxi cities in the south, next to Shanghai international city in the east. Zhangjiagang international port and State highway endow us a convenient water and land transportation which links us to the outside world both home and aboard. Chewit International is one group company with two manufactures one is producing steel forgings for Marine, Power, Boiler, Ocean, Oil, Petrochemical, Mechanical and Hydraulic fields and the other is producing precision steel tubes for automotive industry and hydraulic system and also one semi-independent company specially for import and export business. We have a total area of 150000 square meters with the employees over 200 people. All the products well produced by our mills need to be double inspected by chewit professional quality controller and then we will offer our customer the vivid report for the tested items. Only those products which are inspected well can be allowed to delivery to our customers. By the means of strict inspection, we wined a lot of customer for long term business both home and abroad. We adhere to our company tenet Customer First, Quality formost and always try our best to serve our customer with our full heart.

FAQ

1. who are we?
We are based in Jiangsu, China, start from 2010,sell to Eastern Asia(20.00%),Mid East(20.00%),Eastern Europe(15.00%),Southeast Asia(15.00%),Northern Europe(10.00%),Domestic Market(10.00%),South America(5.00%),Western Europe(5.00%),South Asia(0.00%),North America(0.00%),Oceania(0.00%),Southern Europe(0.00%),Central America(0.00%),Africa(0.00%). There are total about 11-50 people in our office.

2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;

3.what can you buy from us?
Steel Pipe, Seamless Pipe, Hydraulic Oil Tube, Precision Tube, Stainless Steel Tube

4. why should you buy from us not from other suppliers?
Production: Advanced production line and drawing with special oil to make the surface in best condition. Lower roughness and good mechanical performance. Inspection before delivery: Professional team for inspection and randomly check

5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,DDP,DDU;
Accepted Payment Currency:USD,EUR,HKD,CNY;
Accepted Payment Type: T/T,L/C,MoneyGram;
Language Spoken:English,Chinese,Spanish,Japanese