SAE ASTM A519 1020 1045 4130 4140 Srb Cold Seamless Honed Steel Tube

• Customization: Available
• After-sales Service: Support
• Warranty: 1 Year
• Model NO.: SAE ASTM A519 1020 1045 4130 4140
• Technique: Hot Rolled
• Material: Carbon Steel
• Surface Treatment: Black
• Usage: Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose
• Section Shape: Round
• Product Name: Seamless Steel Pipe
• Standards: ASTM/ASME/DIN/En
• Package: Standard Packing
• Others: Customized
• Transport Package: by Sea
• Specification: 10-910mm
• Trademark: Boer King
• Origin: Tianjin China
• HS Code: 730419
• Production Capacity: 10000 Tons/Year

Product Description

Congratulations you find us the best supplier ↓
We do care: 
                   --Good Quality
                       --On-time Delivery
                          --Competitive Price
                             --Efficient After Service 
 

Why you choose us?

1. more than 20 years experiences in steel business

2. good quality

3. competitive price

4. meet your needs via reprocessing

5. excellent service

6. short delivery time

7. long mutual beneficial business cooperation

Product description
 

Standard:	seamless steel tubes as per standard ASTM/ASME/DIN/JIS/GOST	Elongation:	≥16%
Shape:	round&customized	Test temperature:	/
OD:	75mm	I.D Tolerance:	H8
ID:	63mm	Length:	4.5m
WT:	6mm	ID roughness:	Ra≤0.1mm
Type:	cold-rolled; inside hole honing(SRB)	Technology:	SRB&Honed
Yield strength:	≥580	Scope:Honed tube for hydraulic cylinder, swivel crane, injection machine for construction machine application
Tensile Strength:	≥ 620

Process-cycle:
Billet-------Inspection/Shearing-------Pickling--------Surface trastment--------Cold Rolling-------Heat treatment-------Cutting-------Straightening-------Inspection-------Length measuring, Weithting, Coating, Marking Bundling
 
1. Description: Honing is a kind of machining technology. Through honing head, the inner hole of cold drawn pipe is processed by reciprocating high-speed grinding technology, so that the inner hole can meet the requirements of tolerance size and surface roughness that we need.
Honed tube is a kind of smooth bore steel tube used to manufacture hydraulic cylinder barrels that is the core part of a piece of hydraulic cylinder. 
2. Commodity: 42CrMo4 Precision Cold Drawn Honed Pipe
3. Size range: Inside diameter: 25mm -500mm; Wall thickness: 2-50mm
4. Available steel grade: 

SAE/AISI:	SAE1020, SAE1026, SAE1045, SAE4130, SAE4140
DIN:	ST52, ST52.3, ST52.4
EN:	E355, C45E, 25CrMo4, 42CrMo4, CK45, S45C, E410, E470
GB:	20#, 45#, 16Mn, Q345B, Q345C, Q345D, Q345E, 25Mn, 27SiMn,

5. Manufacture method: Cold rolled, hydraulic cold drawn, hot rolled+deep hole boring
6. Delivery condition: 

BK	BKW	BKS	GBK	NBK	Q+T
+C	+LC	+SR	+A	+N
Cold rolled	Cold drawn	Stress relieved	Annealed	Normalized	Quenched+Tempered

7. Bore treatment: Honing, skiving&roller burnishing
8. Bore roughness control: Ra0.25um max or Ra0, 35um max for honed tubes, Ra0.25um max for skived&roller burnished tubes. 
9. End finish: Plain ends with square cuts, free of burrs for honed tubes. Little bevelled ends for skived&roller burnished tubes. 
10. Standard export packing: In bundles tied with steel strips. Internal & external oil coating. Plastic caps on both ends. External packing by PVC bags and knit bags. 
11. Customized packing and marking can be provided upon request. 
12. H8 tolerance: 

ID range	Tolerance	ID range	Tolerance
18< d ≤30	+0/+0.033	180< d ≤250	+0/+0.072
30< d ≤50	+0/+0.039	250< d ≤300	+0/+0.081
50< d ≤80	+0/+0.046	300< d ≤315	+0/+0.081
80< d ≤120	+0/+0.054	315< d ≤400	+0/+0.089
120< d ≤180	+0/+0.063	400< d ≤500	+0/+0.097

13. Difference between honed tube and skived & roller burnished tube: In hydraulic cylinder industry, there are 2 solutions for bore treatment: Honing, and skiving&roller burnishing. Honing or skiving&roller burnishing leads to different internal surface image, but both ensure good roughness. 
 

Chemical composition(%) of precision pipe's commin grade

Standard	Grade	C	Si	Mn	s	p	Cr
GB/T 699 GB/T 3639 GB3077 GB/T1591 GB/T 8163-2018	10#	0.07~0.13	0.17~0.37	0.35~0.65	≤0.035	≤0.035	\
	20#	0.17~0.23	0.17~0.37	0.35~0.65	≤0.035	≤0.035	\
	35#	0.32~0.39	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	\
	40Cr	0.37~0.44	0.17~0.37	0.50~0.80	≤0.035	≤0.035	0.08~1.10
	25Mn	0.22~0.29	0.17~0.37	0.70~1.00	≤0.035	≤0.035	≤0.25
	Q345B	≤0.20	≤o.50	≤1.7	≤0.035	≤0.035	≤0.3
	37Mn5	0.30~0.39	0.15~0.30	1.20~1.50	≤0.015	≤0.020	\

Conventional mechanical properties of precision pipe

Standard	Grade	Delivery Conditions
		BK(hard)		BKW(soft)
		Tensil Stength(Mpa)	Make percentage elongation(%)	Tensile stength(Mpa)	Make percentage elongation(%)
GB/T 3639 GB 3077	20#	≥550	≥10	≥490	≥15
	25Mn	≥600	≥12	≥540	≥15
	Q345B	≥620	≥12	≥550	≥15
	45#	≥645	≥8	≥625	≥15
	40Cr	≥784	≥14	\	\
	37Mn5	≥784	≥14	\	\

Dimensional tolerances of inner diameter
 

Standard	Inner Diameter(mm)	Inner Diameter Deviation(mm)
GB1801-79		H7	H8	H9	H10
	30	0~+21	0~+33	0~+52	0~+84
	30-50	0~+25	0~+39	0~+62	0~+100
	50-80	0~+30	0~+46	0~+74	0~+120
	80-120	0~+35	0~+54	0~+87	0~+140
	120-180	0~+40	0~+63	0~+100	0~+160
	180-250	0~+46	0~+72	0~+115	0~+185
	250-315	0~+52	0~+81	0~+170	0~+210
	315-400	0~+57	0~+89	0~+140	0~+230

 

Products display
 

Packing and shipping
 

Company information 

     Tianjin Boer King Steel is a  professional  trading company and has been in steel industry for more than 15years, specializing in seamless steel pipe,oil casing/drill pipe, galvanized steel pipe, stainless steel pipe,ERW/SSAW/LSAW/ welded pipe.

      Also we sale hot and cold rolled steel coils,steel plates,galvanized steel coils, all kinds of profiles like H-beam, Angel bar,C profile etc.

      We have established long term cooperations with several famous steel manufactures all over the world, and we can offer you best quality products with competitive price which will give you an edge over your competitors.

      Besides, we offer best service all the time.We will do our best to satisfy you needs for the products. Our products have been sold in many countries and areas of the world including South America, Iran, Kenya, Israel etc, and our export volume reaches 160,000tons per year.
 
      We execute quality gurantee system ISO 9001,2008 strictly and all certicates and the third party inspection like MTC,API,ABS,ISO9001,SGS BV etc. will be provided as client's requirements.



FAQ

Q1:How about the quality?
A:Third party inspections are always welcomed, like TUV, BV, SGS.   All of the goods will be released together with MTC and stamped by TPI. 

Q2: Can you accept customization?
A: Yes.we can do customization for you.

Q3: Do you provide samples? Free or not?
A: Yes, we could offer the sample for free but do not pay the cost of freight.

Q4: How long is the delivery time?
A: Generally about 5-10 days if the goods in stock. Or will be 15-30 days if not in stock.

Q5: How about the trade terms?
A: EXW, FOB, CFR, CIF, LC will be accepted.

Contact: James Wang
Tianjin Boer King Steel IMP&EXP Co.,Ltd
Add: No.602,Shuanggang Development Zone,Tianjin,300350 China.
Web: http://boerkingsteel.en.made-in-china.com