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Seamless Carbon Steel Tubing, 0.75 Inch OD, 0.11 Inch Thick, 0.53 Inch ID

Description & Features

Constructed from SAE J524 seamless low carbon steel, this tubing is designed for applications demanding durability and precision. With an outer diameter of 0.75 inches and an inner diameter of 0.53 inches, it features a wall thickness of 0.11 inches, ensuring optimal strength and flexibility. The tubing supports a maximum working pressure of 2664 PSI, making it suitable for rigorous hydraulic systems. Marmon/Keystone's high-quality tubing is ideal for bending and flaring use due to its annealed state, enhancing its adaptability in various industrial applications.

SKU: 3/4.109

Supplier Part Number (MPN): .750X.109-STL-SML

Alternate Part Numbers: C1BK58

Specifications

Burst Pressure 15987	Brand Marmon/Keystone	Brand Marmon - Keystone	Pack Size 12.00	UOM FT	I.D. 0.532 in	Inside Area 0.22	Maximum Working Pressure 2664	O.D. 0.75 in	Rated Flow 10.60	Rated Flow 10.6	Safety Factor 6:1	Supplier Part Number 3/4.109	Wall Thickness 0.11	Alternate Part Numbers Alternate Part Number C1BK58	Product Weight 0.32 lbs

Similar Products

Model Number	O.D.	Wall Thickness	I.D.	Inside Area	Rated Flow	Maximum Working Pressure	Burst Pressure	Safety Factor
1/2.049 Seamless Carbon Steel Tubing	0.5 in	0.049	0.402 in	0.1269	6	1797	10780	6:1
1/2.065 Seamless Carbon Steel Tubing	0.5 in	0.065	0.37 in	0.1075	4.9	2383	14300	6:1
1/4.049 Seamless Carbon Steel Tubing	0.25 in	0.049	0.152 in	0.0181	0.8	3593	21560	6:1
3/8.049 Seamless Carbon Steel Tubing	0.375 in	0.049	0.277 in	0.0602	2.8	2396	14373	6:1
3/8.065 Seamless Carbon Steel Tubing	0.375 in	0.065	0.245 in	0.0471	2.6	3178	19067	6:1
5/8.095 Seamless Carbon Steel Tubing	0.63 in	0.095	0.435 in	0.1485	6.9	2787	16720	6:1
1-1/4.095 Seamless Carbon Steel Tubing	1.25 in	0.095	1.06 in	0.882	41	1393	8360	6:1
1-1/4.120 Seamless Carbon Steel Tubing	1.25 in	0.12	1.01 in	0.8008	36.7	1760	10560	6:1
1.065 Seamless Carbon Steel Tubing	1 in	0.065	0.87 in	0.5942	28.1	1192	7150	6:1
1.120 Seamless Carbon Steel Tubing	1 in	0.12	0.76 in	0.4534	20.7	2200	13200	6:1
1/2.083 Seamless Carbon Steel Tubing	0.5 in	0.083	0.334 in	0.0876	4	3043	18260	6:1
3/16.035 Seamless Carbon Steel Tubing	0.1875 in	0.035	0.1175 in	0.0108	0.4	3422	20533	6:1
3/4.049 Seamless Carbon Steel Tubing	0.75 in	0.049	0.652 in	0.3337	15.4	1198	7187	6:1
3/4.065 Seamless Carbon Steel Tubing	0.75 in	0.065	0.62 in	0.3018	12	1589	9533	6:1
3/4.095 Seamless Carbon Steel Tubing	0.75 in	0.095	0.56 in	0.2462	11	2322	13933	6:1
3/4.109 Seamless Carbon Steel Tubing	0.75 in	0.109	0.532 in	0.2222	10.6	2664	15987	6:1
5/8.065 Seamless Carbon Steel Tubing	0.63 in	0.065	0.495 in	0.1923	9	1907	11440	6:1

Product Questions & Answers (3)

Question by: Rod F on Jun 1, 2025, 2:39 PM

working pressure on this tubing is listed at 2664 psi -- is that already accounting for some kind of safety buffer, or is that the absolute max before things go sideways?

Answer by: Customer Support on Jun 2, 2025, 6:20 PM

That 2664 psi rating already has a 6:1 safety factor built in, so it's a conservative working number rather than the edge of failure. The burst pressure on this tubing is actually rated at 15,987 psi. The 6:1 factor is the standard applied for conditions where hydraulic shock and mechanical strain are considered considerable. If your application runs smoother with minimal shock, a 4:1 factor could allow for higher working pressures, but if you're dealing with severe shock conditions regularly, stepping down to an 8:1 safety factor would be the right call.

Question by: Roy R on Jun 15, 2025, 9:54 PM

What's the highest pressure this tubing can handle without bursting?

Answer by: Customer Support on Jun 17, 2025, 8:47 PM

That tubing is rated to burst at 15987 PSI.

Question by: Frank P on Feb 28, 2026, 4:11 PM

got a tube bender set up for 3/4 line, is this the right size tubing or am i gonna be fighting it?

Answer by: Customer Support on Mar 2, 2026, 6:22 AM

With a 0.75 inch outside diameter and a 0.109 inch wall, this is the standard 3/4 inch OD seamless low carbon steel tubing (SAE J524) that’s annealed for bending and flaring, so it’s a good match for tooling sized by OD.