Unlike 304L, Type 304H has a higher carbon content making the steel more suitable for use in applications where elevated temperatures are present. It is an austenitic chromium-nickel steel alloy and the greater carbon content delivers an increased tensile and yield strength.
304H Alloy is commonly found in the oil refining, gas and chemical industry and is used in industrial boilers, pressure vessels, heat exchangers, Pipelines and condensers. The material is also used throughout the power generation industry. Stainless Steel DIN 1.4301 Seamless TubesStockist, SS UNS S30409 Seamless Tubing, Stainless Steel 304H Cold Drawn Tubes, JIS SUS 304H Seamless Tubes, Stainless Steel 304H Seamless Tubing In India.
The material is recommended for use in ASME pressure vessels in working service above 525 0C due to the grade's heat resistant properties.
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Specification:
Sizes (Seamless): 1/2" NB - 16" NB
Sizes (ERW): 1/2" NB - 24" NB
Sizes (SAW/EFW): 6" NB - 100" NB
Wall Thickness: Schedule 5S - Schedule XXS
Length: Single Random, Double Random, Cut Length
Chemical Composition of 304H Stainless Steel Pipes and Tubes
| Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Chromium (Cr) | Nickel (Ni) |
| Composition (%) | 0.04-0.10 | ≤0.75 | ≤2.00 | ≤0.045 | ≤0.030 | 18.0-20.0 | 8.0-11.0 |
Mechanical Properties of 304H Stainless Steel Pipe and Tubes
| Property | Tensile Strength | Yield Strength | Elongation | Hardness (Brinell) |
| Value | ≥515 MPa | ≥205 MPa | ≥35% | ≤192 HB |
Advantages of 304H Stainless Steel Pipes:
- Good general corrosion resistance and high strength
- Good sulfide stress corrosion resistance
- Resistance to chloride pitting and crevice corrosion
- Higher resistance to chloride stress corrosion cracking
- Easy to weld and conform
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Applications Industry
| Pharmaceutical Equipment | Chemical Equipment |
| Sea Water Equipment | Heat Exchangers |
| Heat Exchangers | Gas Processing |
| Condensers | Specialty Chemicals |
| Pulp and Paper Industry | Pharmaceuticals |
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Exporting Steel Pipes & Tubes to over 60 countries including Afghanistan, Albania, Andorra, Angloa, Austria, Australia, Bahrain, Bangladesh, Bhutan, Brazil, Brunei, Belarus, Belgium, Bulgaria, Cambodia, China, Cyprus, Croatia, Czech Republic, Canada, Denmark, Estonia, Egypt, Finland, France, Germany, Greece, Georgia, Hungary, Iceland, Ireland, Italy, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Lebanon, Latvia, Latin America, Liechtenstein, Lithuania, Luxembourg, Malta, Madagascar, Mexico, Moldova, Monaco, Malaysia, Maldives, Mongolia, Myanmar (Burma), Nepal, New Zealand, North Korea, Netherlands, Norway, Nigeria, Oman, Poland, Portugal, Pakistan, Palestine, Philippines, Qatar, Russia, Romania, Russia, San Marino, Serbia and Montenegro, Slovakia, Slovenia, Spain, Sweden, Switzerland, Saudi Arabia, Singapore, South Korea, South Africa, Sri Lanka, Sudan, Syria, Taiwan, Tanzania, Tajikistan, Thailand, Turkey, Turkmenistan, Ukraine, United Kingdom, United Arab Emirates (UAE), Uzbekistan, Venezuela, Vietnam, Yemen, etc.