Carbon steel is the backbone of most Texas fab work: trailers, gates, pipe racks, ag equipment, skids and structural frames. We source plate, sheet, structural shapes, tube, pipe and cold finish bar, and we arrange the cutting so you get parts, not 40-foot sticks you have to cut down yourself. Most of the savings come from ordering the right spec the first time.
What shops use carbon steel for
Fab and welding shops live on A36 plate, angle, channel and flat bar because it welds easily and bends predictably. When a design needs more strength per pound, A572 Grade 50 plate and beams carry about 50 ksi yield against A36's 36. Trailer and ag builders run A500 square and rectangular tube for frames. Oilfield shops buy A53 and A106 pipe for skids, racks and handrail. Machine shops buy cold finish bar: 1018 for general parts, 1045 when they need more hardness, and 12L14 when cycle time matters more than welding.
Know your tube. A500 is structural tube with a certified yield strength. A513 is mechanical tube, held to tighter dimensions but not rated as structural. Use A500 for anything that carries a load in a building or a trailer frame.
Common carbon steel grades
| Grade | Key traits | Typical uses |
|---|---|---|
| A36 | 36 ksi minimum yield, welds and forms easily | Plate, angle, channel, flat bar, general fabrication |
| A572 Grade 50 | High-strength low-alloy, 50 ksi yield, weldable | Beams, trailer frames, heavy plate work |
| A500 Grade B / C | Structural tube with certified yield | Square and rectangular tube frames, posts |
| A53 / A106 Grade B | Pipe grades; A106 is seamless, for heat and pressure | Pipe racks, handrail, process and utility piping |
| 1018 | Low carbon, cold finished, easy to machine and weld | Pins, spacers, brackets, shafts under light load |
| 1045 | Medium carbon, stronger and harder than 1018, can be heat treated | Shafts, gears, axles |
| 12L14 | Leaded free-machining steel, fastest to cut, not for welding | High-volume turned parts |
| AR400 / AR500 | Through-hardened for abrasion resistance | Bucket liners, chutes, wear plates, targets |
Forms available
Sheet comes hot rolled, hot rolled pickled and oiled, cold rolled and galvanized. Plate runs from 3/16" up. Structural covers angle, channel, wide-flange beam and flat bar. Tube is square, rectangular and round, and pipe runs in standard schedules. Cold finish bar is round, square, flat and hex. Expanded metal and bar grating round out the category for walkways, guards and trailer decks.
Typical carbon steel size ranges
| Form | Commonly available range |
|---|---|
| Hot rolled sheet | 16 gauge to 7 gauge; 48" and 60" wide |
| Cold rolled and galvanized sheet | 26 gauge to 10 gauge; 36" to 60" wide, 96" to 144" long |
| Plate | 3/16" to 4" thick, heavier to order; 96" x 240" and 96" x 480" plates |
| Angle, channel, beam | Angle 1/2" to 8" legs; channel 3" to 15"; beams W4 to W24 and up; 20' and 40' lengths |
| Square and rectangular tube | 1/2" to 12" across, 16 gauge to 5/8" wall; 20', 24' and 40' lengths |
| Pipe | NPS 1/8" to 24" in Schedule 40 and 80; 21' random lengths common |
| Cold finish round bar | 1/8" to about 6" diameter; 12' lengths common |
Commonly available ranges. Ask for anything outside them.
Cutting options for carbon steel
Tube, pipe, beams and bar get saw cut square to length, or mitered if you give the angle. Plate parts from about 3/16" and up are usually plasma cut, fast and accurate enough for weldments. Sheet and thinner plate with holes and tight features go to laser. Waterjet is available when heat can't touch the part, but for most carbon work it's the slow, costly option. See the full cut-to-size options.
Mill certs for carbon steel
Plate, structural and pipe ship with a heat number, and the matching MTR shows chemistry, yield, tensile and elongation against the ASTM spec. You want them for structural steel on permitted buildings, pressure piping, oilfield and code work, or any job an inspector will sign off. Ask on the quote and we'll get mill certs with the order.