Metric Steel Tubing | McMaster-Carr

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About Metal Tubing

About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron

Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into parts that don’t require high strength, such as fixture clamps, mounting plates, and spacers. This material can be surface hardened with heat treating.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Tubes

Yield Strength: See table
Hardness: Not Rated
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Not Rated
Specifications Met: See table

Outside				Inside
Ht.	Ht. Tolerance	Wd.	Wd. Tolerance	Ht.	Wd.	Yield Strength, psi	Specifications Met	Straightness Tolerance		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
0.065" Wall Thick. (-0.007" to 0.007" Tolerance)
1/2"	-0.008" to 0.008"	1 1/2"	-0.008" to 0.008"	0.37"	1.37"	32,000	ASTM A513 Type 1	1/16" per 3 ft.	0000000	00000	000000	000000
1 1/2"	-0.006" to 0.006"	1 1/2"	-0.006" to 0.006"	1.37"	1.37"	32,000	ASTM A513 Type 1	1/16" per 3 ft.	0000000	0000	00000	00000
0.12" Wall Thick. (-0.012" to 0.012" Tolerance)
1 1/2"	-0.01" to 0.01"	2 1/2"	-0.01" to 0.01"	1.26"	2.26"	46,000	ASTM A513 Type 1	1/16" per 3 ft.	0000000	00000	00000	00000

Metric Tubes

Yield Strength: 34,000 psi
Hardness: Rockwell B65 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Not Rated

Outside, mm				Inside, mm
Ht.	Ht. Tolerance	Wd.	Wd. Tolerance	Ht.	Wd.		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
1 mm Wall Thick. (-0.15 to 0.15 mm Tolerance)
12	-0.2 to 0.2	12	-0.2 to 0.2	10	10	0000000	00000	000000	000000
2 mm Wall Thick. (-0.1 to 0.1 mm Tolerance)
25	-0.3 to 0.3	50	-0.3 to 0.3	21	46	0000000	00000	00000	000000
25	-0.25 to 0.25	25	-0.25 to 0.25	21	21	0000000	00000	00000	00000
40	-0.3 to 0.3	40	-0.3 to 0.3	36	36	0000000	00000	00000	000000
55	-0.35 to 0.35	55	-0.35 to 0.35	51	51	0000000	00000	00000	000000
3 mm Wall Thick. (-0.1 to 0.1 mm Tolerance)
100	-0.65 to 0.65	100	-0.65 to 0.65	94	94	0000000	00000	000000	000000

Low-Carbon Steel Round Tubes

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Metric Tubes

Yield Strength: 34,000 psi
Hardness: Brinell 100 (Soft)
Heat Treatable: No

1 mm Wall Thick. (Standard Tolerance)
OD, mm	OD Tolerance, mm	ID, mm		1 ft. Lg.	3 ft. Lg.	6 ft. Lg.
12	-0.08 to 0.08	10	0000000	000000	000000	000000
2 mm Wall Thick. (Standard Tolerance)
12	-0.08 to 0.08	8	00000000	00000	00000	00000
20	-0.08 to 0.08	16	0000000	00000	00000	00000
3 mm Wall Thick. (Standard Tolerance)
20	-0.08 to 0.08	14	00000000	00000	00000	000000
25	-0.08 to 0.08	19	0000000	00000	00000	00000
4 mm Wall Thick. (Standard Tolerance)
25	-0.08 to 0.08	17	00000000	00000	00000	000000
30	-0.08 to 0.08	22	0000000	00000	000000	000000

Smooth-Bore Seamless Steel Tubing

Seamless construction with no weld bead gives this tubing a smooth interior for unrestricted flow. It is stronger than welded tubing and can be flared without splitting. Do not use in corrosive environments.

For technical drawings and 3-D models, click on a part number.

Metric Straights

Temperature Range: See Table
Bending Method: Tube Bender
For Use With: Air, Hydraulic Fluid, Oil
Compatible Tubing Fittings: Compression

1 m
OD, mm	Wall Thick., mm	ID, mm	Max. Pressure	Temperature Range, °F	Temper Rating	Specifications Met		Each
Steel
4	1	2	Not Rated	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
6	1	4	5,600 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
8	1	6	4,200 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
8	2	4	8,500 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
10	1.5	7	5,400 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
12	1.5	9	4,500 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
14	2	10	5,100 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
15	1.5	12	3,600 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
16	2	12	4,500 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
16	3	10	6,700 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
18	2	14	4,000 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
20	2	16	3,600 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
25	2	21	2,800 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
Zinc-Plated Steel
4	1	2	7,200 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
6	1	4	5,100 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
8	1	6	3,800 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
8	2.5	3	10,000 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
10	1.5	7	4,600 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
12	1.5	9	3,800 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
14	2	10	4,400 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
15	1.5	12	3,100 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
16	2	12	3,800 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
16	3	10	5,800 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
18	2	14	3,200 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
20	2	16	2,900 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
25	2	21	2,300 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
2 m
Steel
4	1	2	Not Rated	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	00000000	00000
6	1	4	5,600 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	00000000	00000
8	1	6	4,200 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	00000000	00000
8	2	4	8,500 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	00000000	00000
10	1.5	7	5,400 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	00000000	00000
12	1.5	9	4,500 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	00000000	00000
14	2	10	5,100 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	00000000	00000
15	1.5	12	3,600 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	00000000	00000
16	2	12	4,500 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	00000000	00000
16	3	10	6,700 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	00000000	00000
18	2	14	4,000 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	00000000	00000
20	2	16	3,600 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	00000000	00000
25	2	21	2,800 psi @ 72° F	-5° to 570°	Soft	DIN 2391, DIN EN 10305-4	00000000	00000
Zinc-Plated Steel
4	1	2	7,200 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
6	1	4	5,100 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
8	1	6	3,800 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
8	2.5	3	10,000 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
10	1.5	7	4,600 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
12	1.5	9	3,800 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
14	2	10	4,400 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
15	1.5	12	3,100 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
16	2	12	3,800 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
16	3	10	5,800 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
18	2	14	3,200 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
20	2	16	2,900 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000
25	2	21	2,300 psi @ 72° F	68° to 240°	Soft	DIN 2391, DIN EN 10305-4	000000000	00000

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About Metal Tubing

About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron

Low-Carbon Steel Rectangular Tubes

Low-Carbon Steel Round Tubes

Smooth-Bore Seamless Steel Tubing