ASTM A312 TP304H Stainless Steel Pipe Manufacturer, Supplier, and Exporter in India

Mcneil Instrument, a leading 304h Stainless Steel Pipe manufacturer, supplier, and exporter in India, offers a variety of products including ASTM A312 TP 304H Seamless Pipe and Stainless Steel 304H ERW Pipe. ASTM A312 Gr Tp304h, a high carbon variant of Tp304, boasts superior strength and corrosion resistance, thanks to titanium stabilization. This material also contains trace amounts of molybdenum, nitrogen, niobium, and other elements enhancing its properties. Mcneil Instrument’s A312 304h products are available in diverse types, shapes, and sizes, tailored for high temperature applications with exceptional toughness. With its elevated carbon content, the SA312 Tp304h material ensures high wear and tear resistance, meeting stringent quality standards.

Mcneil Instrument is a manufacturer and supplier of 304h Stainless Steel Pipe types. We offer Stainless Steel 304h Pipe variations including welded, seamless, electric resistant welded, electric fusion welded pipes, and various pipe shapes. Our Stainless Steel 304h Pipe finds applications in oil refineries, gas industries, pressure vessels, heat exchangers, boilers, and components in thermal power plants, among others. The Stainless Steel 304h Erw Pipe can be welded with filler material to minimize intergranular corrosion during welding. Additionally, the Stainless Steel 304h Welded Pipe exhibits greater strength compared to ordinary tp304 pipes, making it suitable for condensers and other applications requiring strength. While our 304h Stainless Steel Pipe and SS 304h Round Pipe is the most commonly used shape, we also manufacture square pipes and hexagonal pipes to cater to the diverse needs of our customers. For a comprehensive product list and pricing details, please reach out to us.

ASTM A312 TP304H Seamless Pipes

Size: 6NB – 1200NB
OD: 1/8″ – 12″ NPS
Thickness : 0.6 – 12.7 mm
Length: Single, Double Random & Cut Length

ASTM A312 TP304H Erw / Welded Pipes

Size: 1/8” – 36” NB, 1/4” – 36” OD
OD: 6.35 – 114.3 mm
Thickness : 0.8 – 12.7 mm
Length: up to 26 Meters

Specification Schedule of ASTM A312 TP304H

ASTM SpecificationsASTM A312 / ASTM SA312
Dimensional ASME SpecificationsANSI/ASME B36.19M, ANSI/ASME B36.10M
Different Types and FormsRound, Honed, Rectangle, Hydraulic, Hex, Square
Common typesWelded, CDW, Fabricated, 100% X Ray Welded, ERW, Seamless
Pipe End AbbreviationsBeveled end, Treaded Both Ends, Treaded On End, Bevel large end, Plain Both Ends, Beveled One End, Plain One End, Bevel small end, Bevel one end, Bevel both ends
Grade and Delivery ConditionBright Annealed, Polished, Cold Drawn, Annealed and Pickled
Surface Finish Types2B, No.4, No.1, No.8 Mirror Finish or custom Finish as per customer Requirements
Thickness RangeSCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Full Range of Value-Added ServicesUltrasonic Testing, Machining, Threading, Non Destructive, Beveling, Customer Tagging/ Marking, Destructive, MTR’s Available, Grooving, Export Documentation, Cutting, Polishing, Export Packaging, Material testing, Color Coding, Threading
  • Specification
  • Grade
  • Nominal Pipe Sizes
  • Pipe Schedule or Wall Thickness
  • Manufacturing Method (Seamless / Welded)
  • Heat Number
  • Manufacturer’s Name or Custom Logo – on request

Marked Pipe Sample: ANSI B36.19 ASTM A312 TP304H 12″ NB SCH 40S SEAMLESS HEAT NO. XXXX

What Does the H Mean in 304h Pipes?

Mcneil Instrument utilizes stainless steel extensively across various applications worldwide, with grade 304 being the most prevalent. Known for its mild corrosion resistance, good strength, and wear properties, grade 304 in Stainless Steel 304h Welded Pipe is a chromium-nickel austenitic stainless steel. However, there are occasions where enhanced properties are required without transitioning to a different steel grade.

To achieve this, Mcneil Instrument modifies the material by adjusting its chemical composition. For instance, in the case of grade 304, carbon content manipulation can reduce chromium carbide precipitation during welding or increase toughness and wear resistance. The variant with higher carbon content is denoted as 304H, while the one with lower carbon content is termed 304L.

In Mcneil Instrument’s context, the “H” in Stainless Steel 304h Pipe signifies its high carbon content, a common nomenclature across various stainless steel grades. Furthermore, high carbon versions typically lack a 0.1% nitrogen limit in their composition compared to their low carbon counterparts. Additionally, to meet standards, high carbon versions must maintain an ASTM No. 7 grain size.

Stainless Steel 304h Pipe for sale

SS UNS S30409 Seamless PipeSA 312 TP 304H Round Pipe
ASTM A 312 TP 304H Stainless Steel Exhaust PipeA312 TP 304H Electropolished Pipe
ASTM A312 GR TP304H Schedule 40 PipeTP 304H Stainless Steel Threaded Pipe
A312 Stainless Steel 304H 3 Inch PipeASTM A312 TP304H Water Pipe
Austenitic Stainless Steel 304H Square Pipe PriceA312 TP304H Rectangular Pipe
Werkstoff nr. 1.4301 Stainless Steel 304H Hollow PipeTP 304H Stainless Steel DIN 1.4301 Box Pipe
Stainless Steel UNS S30409 Schedule 80 PipeASTM A312 SS 304H C Class Pipe
A312 GR TP304H Schedule 10 PipeSA312 304H Stainless Steel Dairy Pipe
ASTM A312 TP304H Polished PipeTP 304H Stainless Steel Erw Pipe

Mechanical Properties Table of ASTM A312 TP304h Pipe

SUSTensile Strength minimum (MPa) Yield Strength 0.2% Proof minimum (MPa) Elongation minimum (% in 50mm)Hardness
Rockwell B (HR B) maximumBrinell (HB) maximum

A312 TP304h Chemical Compatibility Chart


Equivalent grades of AISI 304h Pipe

ASTM A312 304HS304091.4948SUS 304H304S11X5CrNi18-102332