sa240 tp 304H Filler Wire ER308H and Alternatives

SA240 TP 304H Filler Wire: ER308H and Alternatives

At Gangsteel, a leading manufacturer and exporter of stainless steel products, we supply premium SA240 TP 304H filler wire compatible with SA 240 TP 304H plates compliant with ASME SA 240 and ASTM A240 standards. SA240 TP 304H filler wire, used for welding this high-carbon austenitic grade (UNS S30409, AISI 304H, EN 1.4948), must match its composition to maintain high-temperature strength up to 1500°F (815°C). This guide details ER308H and alternatives for SA240 TP 304H filler wire, including specifications, welding methods, and precautions for applications like boilers and heat exchangers. For inquiries, contact us at admin@gangsteel.com or explore our ASME SA240 Stainless sheet.

What is ER308H Filler Wire for SA240 TP 304H?

ER308H filler wireis the primary recommendation for welding SA240 TP 304H stainless steel, classified under AWS A5.9 for TIG (GTAW) and MIG (GMAW) processes. It matches the high-carbon content (0.04-0.10%) of SA240 TP 304H, preserving creep resistance and high-temperature performance.

Key Specifications of ER308H Filler Wire

ER308H is preferred for its compatibility with high-temperature service, minimizing carbide precipitation. For low-carbon alternatives, see sa240 gr 304l.

Alternative Filler Wires for SA240 TP 304H

While ER308H is standard, alternatives are used based on application requirements:

• ER308: Suitable for low-heat input welds; less ideal for high-temperature service.
• ER321/ER347: Stabilized with Ti or Nb to prevent carbide formation, better for welds in the 797°F-1580°F (425°C-860°C) range. See sa240 gr 321.
• E308H-16: For stick welding; perfect for on-site work.

For chloride-heavy environments, see sa240 gr 316l.

Best Practices for Using SA240 TP 304H Filler Wire

To achieve high-quality welds with SA240 TP 304H filler wire:

• Heat Input: Limit to <2.0 kJ/mm to minimize carbide precipitation and sensitization.
• Interpass Temperature: Keep ≤300°F (149°C) to prevent overheating and maintain properties.
• Shielding Gas: Use pure argon or argon-helium mixes (10-20 L/min) to protect against oxidation.
• Post-Weld Treatment: Anneal at 1870-2050°F (1020-1120°C) with rapid cooling to restore corrosion resistance.
• Pre-Weld Preparation: Clean surfaces to remove contaminants; preheat to 200°F (93°C) for thick plates to avoid cracking.

These practices ensure welds match the base metal’s high-temperature performance. For low-carbon alternatives, see sa240 gr 304l.

Applications of SA 240 TP 304H Welding

Welded SA 240 TP 304H stainless steel is used in:

• Boilers and pressure vessels (steam drums, headers).
• Heat exchangers (tubes, shells).
• Power generation (superheaters, reheaters).
• High-temperature piping and fittings (SA 240 GR 304 pipe).

For stabilized grades, see sa240 gr 321.

Pricing and Availability

As of October 19, 2025, SA240 TP 304H stainless steel plate prices (2B finish, 3-10mm) range from $1.60-$3.50/kg. Gangsteel offers $1.60/kg FOB (MOQ 1 ton) for sa240 gr 304h. Contact admin@gangsteel.com or visit astm a 240 stainless plate.

FAQ on SA 240 GR 304H Welding Rod

What is the recommended welding rod for SA 240 GR 304H?

ER308H is the top choice for TIG/MIG, matching the high-carbon content for creep resistance and high-temperature strength.

What are the specifications of SA 240 GR 304H welding rod?

AWS A5.9 ER308H with 0.04-0.08% C, 19.5-21.5% Cr, 9.0-11.0% Ni; diameters 0.8-4.0 mm; use with argon shielding.

Why is ER308H the best for SA 240 GR 304H welding?

It matches the 0.04-0.10% carbon to maintain high-temperature strength and prevent dilution during welding.

What alternatives to ER308H are available for SA 240 GR 304H welding?

ER308 for general use, ER321 for stabilization, or E308H-16 for stick welding; choose based on application.

What precautions are needed when using SA 240 GR 304H welding rod?

Limit heat input to <2.0 kJ/mm, interpass ≤300°F, and anneal post-weld to avoid sensitization and ensure durability.