Heavy-wall steel tubes stenciled with the Sigma Tube & Bar name
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Sigma Tube & Bar

Houston, TXSince 2013ISO 9001:2015sigmatb.com
Photo: sigmatb.com

Get prices and lead times from Sigma Tube & Bar

What you can buy

  • Hot-rolled

  • Cold-rolled

  • Stainless steel

  • High-strength steel

  • Cut-to-length sheet

Sizes

Round bar
1018, 8620, 8630 Mod, 4340, 4330V Mod, 4145, 4140, 4130 and 4130M-7 from 3" to 32"; as-rolled, annealed, normalized, Q&T and NQ&T to yields of 75–150 KSI; API 6A and NACE MR-0175 grades
Square blocks
4130, 9" to 16.250", normalized or NQ&T, 75–80 KSI
Hot-finished tubing
1026, 4140, 4130, 4130 Mod and 4130M-7 from 3" to 32" (ASTM A519, API 5CT), yields to 135 KSI
Cold-drawn tubing
4140, 4130 and 4130 Mod from 1" to 8.250", Q&T, 80–125 KSI
Stainless bar
2205 duplex, 17-4 (H1150), 420, 410, 316 and 304 from 1" to 24"
Cutting
Cut-to-length, splitting and angle cutting; saw cutting to ±0.125"
Incoming inspection
Hardness testing, micrometer checks, dry magnetic particle testing and full traceability verification
Partner services
Water, oil and polymer quench heat treating, sandblasting and straightening; NDT, corrosion and chemical testing; turning, trepanning, boring, honing, gundrilling, skiving and roller burnishing

About Sigma Tube & Bar

Sigma Tube & Bar is a Houston, Texas distributor of alloy and stainless bar and mechanical tubing for the oil and gas industry, founded in 2013. From its warehouse on West Hardy Road it stocks 4130, 4140, 4145, 4330V and 8630 bar and hot-finished and cold-drawn tubing in as-rolled through quenched-and-tempered conditions, plus duplex and stainless bar, and provides saw cutting, inspection and arranged heat treating, testing and machining.

Processing
Cut-to-length, Sawing, Warehousing
Industries served
Oil and gas
Certifications
ISO 9001:2015, API Spec Q1, API 20J distributor

Location

  • Houston, TX

    Headquarters

Photos

Prices and lead times from Sigma Tube & Bar, without the phone tag.