4130 Alloy Steel Round Seamless — Picture for identification; check the listing for the exact item.

Steel, tube & firewall

4130 Round Seamless Steel Tubing

The airframe tube, 126 sizes, with wall, inside diameter and weight per foot.

Material4130 chrome-moly, seamless
Lengths1 to 24 ft
Sizes126, from 3/16" to 2-3/4" OD

Where to buy

AmericaDistributor coming soonOur partner for this region is on its way

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OceaniaDistributor coming soonOur partner for this region is on its way

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Note the stated dimensional tolerance of ±10%. That is Spruce's wording and it is wide; if a wall thickness is critical, ask for test reports, which Spruce supplies for a charge.

For airframe square and rectangular tube see 4130 square tubing.

Specifications

Material	4130 chrome-moly, seamless
Sizes	126, from 3/16" to 2-3/4" OD
Lengths	1 to 24 ft
Tolerances (per the listing)	Dimensional ±10%; cut length ±1/8"
Tensile strength (listed)	90,000 psi, as stated by Spruce

Source: a distributor's listing, checked 2026-09-30.

Sizes listed 126 rows

OD (in.)	Wall (in.)	ID (in.)	Weight per ft (lb)	Part No.
3/16	.035	0.118	0.039	03-00183
1/4	.028	0.194	0.067	03-00250
1/4	.035	0.180	0.080	03-00300
1/4	.049	0.152	0.105	03-00400
1/4	.058	0.134	0.119	03-00500
1/4	.065	0.120	0.128	03-00510
5/16	.035	0.243	0.104	03-00700
5/16	.049	0.215	0.138	03-00800
5/16	.058	0.197	0.158	03-00810
5/16	.065	0.183	0.172	03-00900
5/16	.095	0.123	0.221	03-01000
3/8	.028	0.319	0.104	03-01100
3/8	.035	0.305	0.127	03-01200
3/8	.049	0.277	0.171	03-01300
3/8	.058	0.259	0.196	03-01400
3/8	.065	0.245	0.215	03-01500
3/8	.083	0.209	0.259	03-01600
3/8	.095	0.185	0.284	03-01610
7/16	.028	0.382	0.123	03-00122
7/16	.035	0.368	0.151	03-01700
7/16	.049	0.340	0.204	03-01800
7/16	.058	0.322	0.236	03-00067
7/16	.065	0.308	0.259	03-02000
7/16	.095	0.248	0.348	03-02100
7/16	.120	0.198	0.408	03-02200
1/2	.028	0.444	0.141	03-02300
1/2	.035	0.430	0.174	03-02400
1/2	.049	0.402	0.236	03-02500
1/2	.058	0.384	0.274	03-02600
1/2	.065	0.370	0.302	03-02700
1/2	.083	0.334	0.370	03-02710
1/2	.095	0.310	0..411	03-02800
1/2	.120	0.260	0.487	03-02900
9/16	.035	0.493	0.197	03-03000
9/16	.065	0.433	0.346	03-03200
9/16	.120	0.323	0.568	03-03400
5/8	.028	0.569	0.179	03-03500
5/8	.035	0.555	0.221	03-03600
5/8	.049	0.527	0.301	03-03700
5/8	.058	0.509	.351	03-03800
5/8	.065	0.495	0.389	03-03900
5/8	.095	0.435	0.538	03-04000
5/8	.120	0.385	0.647	03-04100
5/8	.156	0.313	0.781	03-04110
3/4	.028	0.694	0.216	03-04250
3/4	.035	0.680	0.267	03-04300
3/4	.049	0.652	0.367	03-04400
3/4	.058	0.634	0.429	03-04500
3/4	.065	0.620	0.476	03-04600
3/4	.095	0.560	0.665	03-04700
3/4	.120	0.510	0.807	03-04800
3/4	.156	0.438	0.990	03-04900
3/4	.188	0.374	1.128	03-05000
7/8	.035	0.805	0.314	03-05300
7/8	.049	0.777	0.432	03-05400
7/8	.058	0.759	0.506	03-05500
7/8	.065	0.745	0.562	03-05600
7/8	.083	0.709	0.702	03-05700
7/8	.095	0.685	0.791	03-05800
7/8	.120	0.635	0.968	03-05900
7/8	.188	0.499	1.379	03-06000
1	.028	0.944	0.291	03-06110
1	.035	0.930	0.361	03-06100
1	.049	0.902	0.498	03-06200
1	.058	0.884	0.584	03-06300
1	.065	0.870	0.649	03-06400
1	.083	.834	1.000	03-06450
1	.095	0.810	0.918	03-06500
1	.120	0.760	1.128	03-06600
1	.156	0.688	1.406	03-06700
1	.188	0.624	1.630	03-06800
1-1/8	.035	1.055	0.407	03-06900
1-1/8	.049	1.027	0.563	03-07000
1-1/8	.058	1.009	0.661	03-07100
1-1/8	.065	0.995	0.736	03-07200
1-1/8	.095	.0935	1.045	03-07300
1-1/8	.120	0.885	1.288	03-07400
1-1/8	.188	--	--	03-00263
1-1/4	.035	1.180	0.454	03-07500
1-1/4	.049	1.152	0.638	03-07600
1-1/4	.058	1.134	0.738	03-07700
1-1/4	.065	1.120	0.823	03-07800
1-1/4	.083	1.084	1.132	03-07810
1-1/4	.095	1.060	1.172	03-07900
1-1/4	.120	1.010	1.448	03-08000
1-1/4	.156	0.938	1.823	03-08100
1-3/8	.035	1.305	0.501	03-08210
1-3/8	.049	1.277	0.694	03-08200
1-3/8	.058	1.259	0.816	03-08300
1-3/8	.065	1.245	0.909	03-08400
1-3/8	.095	1.185	1.299	03-08500
1-3/8	.120	1.135	1.609	03-08600
1-3/8	.188	0.999	2.383	03-08700
1-1/2	.035	1.430	0.548	03-08800
1-1/2	.049	1.402	0.759	03-08900
1-1/2	.058	1.384	0.893	03-09000
1-1/2	.065	1.370	0.996	03-09100
1-1/2	.083	1.334	1.256	03-09110
1-1/2	.095	1.310	1.426	03-09200
1-1/2	.120	1.260	1.769	03-09300
1-1/2	.188	1.124	2.634	03-09400
1-5/8	.049	1.527	0.825	03-09500
1-5/8	.058	1.509	0.971	03-09600
1-5/8	.065	1.495	1.083	03-09700
1-5/8	.083	1.459	1.10	03-00042
1-5/8	.095	1.435	1.552	03-09800
1-5/8	.120	1.385	1.929	03-09900
1-5/8	.156	1.313	2.447	03-10000
1-5/8	.188	1.249	2.885	03-10100
1-3/4	.049	1.652	0.890	03-10200
1-3/4	.058	1.634	1.048	03-10210
1-3/4	.065	1.620	1.170	03-10300
1-3/4	.095	1.560	1.679	03-10400
1-3/4	.120	1.510	2.089	03-10500
1-3/4	.188	1.374	3.136	03-10510
1-7/8	.250	1.375	2.249	03-10600
2	.049	1.902	1.021	03-10710
2	.065	1.870	1.343	03-10800
2	.095	1.810	1.933	03-10900
2	.120	1.760	2.409	03-11000
2	.188	1.625	3.638	03-00193
2-1/4	.120	2.010	2.730	03-11100
2-1/2	.095	2.31	2.44	03-11150
2-1/2	.120	2.260	3.05	03-11200
2-1/2	.250	2.000	6.008	03-11206
2-3/4	.125	2.500	3.370	03-11210

Questions people actually ask

What is the 4130 Alloy Steel Round Seamless made of?

4130 chrome-moly, seamless, according to the distributor listing checked on 2026-09-30.

What sizes of the 4130 Alloy Steel Round Seamless are listed?

126, from 3/16" to 2-3/4" OD, according to the distributor listing checked on 2026-09-30.

Where can I buy the 4130 Alloy Steel Round Seamless?

A distributor we checked lists it in the Americas. The link to its page, with the live price and stock, opens when the partnership does.

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