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At Gangsteel, a leading manufacturer and exporter of stainless steel products, we supply high-quality SA 312 TP-304H stainless steel pipes and SA 240 GR 304H plates compliant with ASME SA 312 and SA 240 standards. SA 312 TP-304H, also known as AISI 304H, UNS S30409, or 1.4948, is a high-carbon austenitic stainless steel optimized for high-temperature service up to 1500°F (815°C). As the pipe equivalent to SA 240 GR 304H plate, it shares identical composition and properties for seamless integration in pressure vessels and piping systems. This guide details the equivalence, specifications, and applications of SA 312 TP-304H as the pipe counterpart to SA 240 plate. Contact us at admin@gangsteel.com or explore our ASME SA240 Stainless sheet offerings.
SA 312 TP-304His specified under ASME SA 312 for seamless, welded, and heavily cold-worked austenitic stainless steel pipes for high-temperature and corrosive service. It is the direct pipe equivalent to SA 240 GR 304H plate under ASME SA 240, both featuring 0.04-0.10% carbon for enhanced creep and rupture strength. The "TP" denotes "Type," aligning with AISI 304H. Non-magnetic with a density of 8.00 g/cm³, SA 312 TP-304H pipes are used in conjunction with SA 240 plates for fabricated systems like boilers and heat exchangers. See sa240 gr 304h for plate details.
The chemical composition of SA 312 TP-304H (equivalent to SA 240 GR 304H) ensures high-temperature performance:
Element |
Range (%) |
---|---|
Carbon (C) |
0.04 - 0.10 |
Manganese (Mn) |
0.00 - 2.00 |
Silicon (Si) |
0.00 - 0.75 |
Phosphorus (P) |
0.00 - 0.045 |
Sulfur (S) |
0.00 - 0.030 |
Chromium (Cr) |
18.00 - 20.00 |
Nickel (Ni) |
8.00 - 10.50 |
Nitrogen (N) |
0.00 - 0.10 |
Iron (Fe) |
Balance |
High carbon (0.04-0.10%) boosts creep resistance. See sa240 gr 304l for low-carbon variants.
Property |
Value (Min) |
---|---|
Tensile Strength |
515 MPa (75 ksi) |
Yield Strength |
205 MPa (30 ksi) |
Elongation |
40% |
Hardness (Brinell) |
≤ 201 HB |
High strength at high temperatures (25.5 ksi allowable at 1000°F). See sa240 gr 304.
SA 312 TP-304H (equivalent to SA 240 GR 304H) resists mild acids and atmospheric conditions, outperforming SS204 vs SS 304. Higher carbon risks sensitization in welds; anneal for protection. See sa240 gr 316l for chlorides.
Fair with ER308H fillers; low heat input (<2.0 kJ/mm) and annealing required. See sa240 gr 321.
SA 312 TP-304H pipe, equivalent to SA 240 GR 304H plate, is used in:
For cost-effective options, see sa240 gr 201.
As of October 19, 2025, SA 312 TP-304H pipe prices (Sch 10S, 1-4" OD) range from $1.80-$4.00/kg. Gangsteel offers $1.80/kg FOB (MOQ 1 ton) for sa240 gr 304h. Contact admin@gangsteel.com or visit astm a 240 stainless plate.
Identical: 0.04-0.10% C, 18-20% Cr, 8-10.5% Ni, ensuring high-temperature compatibility.
They are the same: tensile strength 515 MPa (75 ksi), yield strength 205 MPa (30 ksi), elongation 40%.
Density 8.00 g/cm³, melting point 1400-1450°C, max service temperature 1500°F (815°C) continuous.
High-temperature pressure vessels, boilers, heat exchangers, and chemical piping, leveraging creep resistance.
Competitive pricing ($1.80/kg FOB for pipe, $1.60/kg for plate), 600+ ton stock, custom fabrication, and full certifications.
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