Drawn Over Mandrel-Qingdao MacroReward International Trade Co., Ltd

Drawn Over Mandrel

Update: 2015/4/6 View:

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Introduction

Drawn Over Mandrel (DOM) Round Mechanical Tubing is a cold drawn 1020 / 1026 electric resistance welded tube with all the flash removed prior to cold drawing. In comparison to other tubing, DOM round tubing is produced to more exact OD and ID tolerances, and has the highest weld strength possible.

Made from 1020 / 1026 Steel
Meets ASTM A513 Type 5
Stocked Size Range: 3/16” – 14” OD; .028” - .625” wall thickness
Stocked in 20’ random lengths
Cut to length sizes
Suitable to hone sizes
Imperial and metric sizes
Custom sizes available upon request

Benefits of Drawn Over Mandrel (DOM) Round Mechanical Tubing:

Uniform wall thickness with close OD and ID tolerances
Uniform grain structure and controlled hardness
High Tensile and Yield Strength
Smooth and Clean OD and ID surfaces
Excellent machining characteristics
Applications: Hydraulic Cylinders, Axles, High Speed Shafts, Barrels, Bearings, Spacers, and many other machined tubular parts.

D.O.M. Steel Tubing

Test reports available on request.

ASTM A513 Type 5

Grade	Chemistry	%	Yield	Tensile	Elongation	Typical Hardness
			PSI	PSI	% in 2" section	Min
1020	Carbon	0.15-0.25	60,000	70,000	10	B-80
	MN	0.30-0.60
	P	0.040 Max
	S	0.050 Max
1026	Carbon	0.21-0.28	75,000	85,000	15	B-85
	MN	0.60-0.90
	P	0.040 Max
	S	0.050 Max
ST52.3	Carbon	0.13-0.18	75,000	85,000	15	B-80
	MN	1.2-1.4
	P	0.025 max
	S	0.010 max

Diameter Tolerances

OD Inches	Wall:	OD Inches		ID Inches
Size Range	Percent of OD	Plus	Minus	Plus	Minus
Up to 0.499	All	0.004	0.000
0.500-1.699	All	0.005	0.000	0.000	0.005
1.700-2.099	All	0.006	0.000	0.000	0.006
2.100-2.499	All	0.007	0.000	0.000	0.007
2.500-2.899	All	0.008	0.000	0.000	0.008
2.900-3.299	All	0.009	0.000	0.000	0.009
3.300-3.699	All	0.010	0.000	0.000	0.010
3.700-4.099	All	0.011	0.000	0.000	0.011
4.100-4.499	All	0.012	0.000	0.000	0.012
4.500-4.899	All	0.013	0.000	0.000	0.013
4.900-5.299	All	0.014	0.000	0.000	0.014
5.300-5.549	All	0.015	0.000	0.000	0.015
5.550-5.999	Under 6"	0.010	0.001	0.001	0.001
	6 to 7 1/2"	0.009	0.009	0.009	0.009
6.000-6.499	Under 6	0.013	0.013	0.013	0.013
	6 to 7 1/2"	0.014	0.014	0.014	0.041
6.500-6.999	Under 6	0.015	0.015	0.015	0.015
	6 to 7 1/2	0.012	0.012	0.012	0.012
7.000-7.499	Under 6	0.018	0.018	0.018	0.018
	6 to 7 1/2	0.013	0.013	0.013	0.013
7.500-7.999	Under 6	0.002	0.002	0.002	0.002
	6 to 7 1/2	0.015	0.015	0.015	0.015
8.000-8.499	Under 6	0.023	0.023	0.023	0.023
	6 to 7 1/2	0.016	0.016	0.016	0.016
8.500-8.999	Under 6	0.025	0.025	0.025	0.025
	6 to 7 1/2	0.017	0.017	0.017	0.017
9.000-9.499	Under 6	0.028	0.028	0.028	0.028
	6 to 7 1/2	0.019	0.019	0.019	0.019
9.500-9.999	Under 6	0.003	0.003	0.003	0.003
	6 to 7 1/2	0.002	0.002	0.002	0.002
10.000-10.999	Under 6	0.034	0.034	0.034	0.034
	6 to 7 1/2	0.022	0.022	0.022	0.022
11.000-11.999	Under 6	0.035	0.035	0.035	0.035
	6 to 7 1/2	0.025	0.025	0.025	0.025
12.000-12.999	Under 6	0.036	0.036	0.036	0.036
	6 to 7 1/2	0.027	0.027	0.027	0.027
13.000-13.999	Under 6	0.037	0.037	0.037	0.037
	6 to 7 1/2	0.029	0.029	0.029	0.029
14.000-15.000	Under 6	0.038	0.038	0.038	0.038
	6 to 7 1/2	0.003	0.003	0.003	0.003

Ovality shall be within the above tolerances except when the wall thickness is less than 3% of the OD.

In those cases the additional ovality shall be as follows, but the mean diameter shall be within the specified tolerance

Outside Diameter	Additional Ovality Tolerance	Outside Diameter	Additional Ovality Tolerance
Up to 2"	0.010"	7" - 8" incl.	0.040"
2" - 3" incl.	0.015"	8" - 9" incl.	0.045"
3" - 4" Incl.	0.020"	9"-10" incl.	0.050"
4" - 5" incl.	0.025"	10"-11" incl.	0.055"
5" - 6" incl.	0.030"	11"-12" incl.	0.060"
6" - 7" incl.	0.035"	12"-12.5"incl.	0.065"

Straightness Tolerance

.030” in any 3 ft. of length up to 7.500” OD
.060” in any 3 ft. of length over 7.500” OD

Wall Tolerances

Wall	Including	Over .875" to	Over 1.875" to	Over 3.750 "to
Thickness,	.375" to	1.875" OD	3.750" OD	15.000" OD
Inches	.875" OD
0.028 & 0.035	0.002"	0.002"	0.002"
	-0.002"	-0.002"	-0.002"
0.049	0.002"	0.002"	0.002"
	-0.002"	-0.003"	-0.003"
0.065	0.002"	0.002"	0.002"	0.004"
	-0.002"	-0.003"	-0.003"	-0.004"
0.083	0.002"	0.002"	0.003"	0.004"
	-0.002"	-0.003"	-0.003"	-0.005"
0.095	0.002"	0.002"	0.003"	0.004"
	-0.002"	-0.003"	-0.003"	-0.005"
0.109	0.002"	0.002"	0.003"	0.005"
	-0.003"	-0.004"	-0.003"	-0.005"
0.120	0.003"	0.002"	0.003"	0.005"
	-0.003"	-0.004"	-0.003"	-0.005"
0.134		0.002"	0.003"	0.005"
		-0.004"	-0.003"	-0.005"
0.148		0.002"	0.003"	0.005"
		-0.004"	-0.003"	-0.005"
0.165		0.003"	0.003"	0.005"
		-0.004"	-0.004"	-0.006"
0.180		0.004"	0.003"	0.006"
		-0.004"	-0.005"	-0.006"
0.203		0.004"	0.004"	0.006"
		-0.005"	-0.005"	-0.007"
0.220		0.004"	0.004"	0.007"
		-0.006"	-0.006"	-0.007"
0.238		0.005"	0.005"	0.007"
		-0.006"	-0.006"	-0.007"
0.259		0.005"	0.005"	0.007"
		-0.006"	-0.006"	-0.007"
0.284		0.005"	0.005"	0.007"
		-0.006"	-0.006"	-0.007"
0.300		0.006"	0.006"	0.008"
		-0.006"	-0.006"	-0.008"
0.320		0.007"	0.007"	0.008"
		-0.007"	-0.007"	-0.008"
0.344		0.008"	0.008"	0.009"
		-0.008"	-0.008"	-0.009"
0.375			0.009"	0.009"
			-0.009"	-0.009"
0.400			0.010"	0.010"
			-0.010"	-0.010"
0.438			0.011"	0.011"
			-0.011"	-0.011"
0.480			0.012"	0.012"
			-0.012"	-0.012"
0.531			0.013"	0.013"
			-0.013"	-0.013"
0.563			0.013"	0.013"
			-0.013"	-0.013"
0.580			0.014"	0.014"
			-0.014"	-0.014"
0.600			0.015"	0.015"
			-0.015"	-0.015"
0.625			0.016"	0.016"
			-0.016"	-0.016"
0.650				0.017"
				-0.017"

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