What is astm a240 tp 304 equivalent steel plate grade?

What is Astm a240 tp 304 equivalent steel plate grade in China, JIS, EN, DIN, ISO?

In stainless steel specifications, ASTM A240 TP 304 (UNS S30400) is a widely used austenitic grade for tubing plates, sheets, and strips in pressure vessels and general applications, known for its excellent corrosion resistance, formability, and weldability in mild environments. "TP" often denotes "Type" or "Tubing Plate," but it refers to the same material as Grade 304 under ASTM A240/A240M. Finding equivalent steel grades is essential for international sourcing, cost optimization, or compliance with regional standards like EN, DIN, JIS, or BS. These equivalents, such as EN 1.4301 (X5CrNi18-10), DIN 1.4301, JIS SUS304, and BS 304S31, offer similar 18-8 Cr-Ni chemistry, mechanical properties (tensile ≥515 MPa, yield ≥205 MPa), and corrosion resistance (PREN 18-20) for ambient duties. As a leading manufacturer and exporter in China, Gangsteel produces ASTM A240 TP 304 and its equivalents with dual certifications, ensuring performance in food, chemical, and architectural sectors.

This article details TP 304 equivalents, their specs, and usage tips. For our austenitic lineup, browse the ASTM A 240/A 240M stainless steel plate portfolio, including ASTM A 240 Gr 304 and low-carbon ASTM A 240 Gr 304L.

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1. Understanding ASTM A240 TP 304: The Reference for Equivalents

ASTM A240 TP 304 is an austenitic stainless steel (18-8 Cr-Ni) for tubing plates in pressure vessels, with carbon ≤0.08% for balanced weldability and corrosion resistance in mild atmospheres and acids. It's non-magnetic annealed, ductile for forming, and resists IGC per A262 after anneal.

Attributes:

• Chemistry: Cr 18.0-20.0%, Ni 8.0-10.5%, Mn ≤2.0%, Si ≤0.75%, P ≤0.045%, S ≤0.030%, N ≤0.10%.
• Mechanics: Tensile ≥515 MPa, Yield ≥205 MPa, Elongation ≥40%, Hardness ≤201 HB.
• Corrosion: PREN 18-20; good in dilute acids.
• Fabricability: Welds with 308 filler; forms well.

Equivalents must match for general use. Gangsteel ensures via dual-certs.

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2. Why Equivalents Matter: Benefits and Key Considerations

Equivalents offer:

• Availability: JIS SUS304 in Asia when ASTM delayed.
• Cost: GB 06Cr19Ni10 20% cheaper.
• Compliance: EN 1.4301 for PED.
• Performance: Similar IGC/welds per ISO 15510.

Consider:

• Variations: EN Ni 8.0-10.5%—check stability.
• Testing: A262 IGC required.
• Limits: Equivalents for mild; chlorides need Mo.

Gangsteel’s equivalents save 15-25% in projects.

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3. Key Criteria for Determining Equivalents

Equivalents align on:

• Chemistry: Low C ≤0.08%, Cr 18-20%, Ni 8-11%.
• Mechanics: Yield 205-220 MPa, elongation >40%.
• Corrosion: PREN 18-20, A262 pass.
• Standards: EN 10088, JIS G4305 references.
• Fabricability: Weld/form similar.

Gangsteel lab-verifies.

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4. Comprehensive List of ASTM A240 TP 304 Equivalents

From standards:

These are functional per ISO 15510; minor Ni in EN ok for most.

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5. Detailed Comparison: ASTM TP 304 vs Key Equivalents

ASTM TP 304 vs EN 1.4301

• Chemistry: Identical C/Cr; EN Ni narrower (8.0-10.5%).
• Mechanics: Tensile 515-620 MPa match.
• Corrosion: Equivalent PREN/A262.
• Use: Interchangeable; EN for CE.

ASTM TP 304 vs JIS SUS304

• Chemistry: Matching; JIS Si ≤1.00% minor.
• Mechanics: Yield 205-230 MPa aligned.
• Corrosion: Same; JIS for Japanese codes.
• Use: Seamless in Asia.

ASTM TP 304 vs BS 304S31

• Chemistry: Per EN.
• Mechanics: BS EN 10088 matches.
• Corrosion: Identical.
• Use: For UK vessels.

Differences negligible; Gangsteel verifies.

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6. Applications Where Equivalents Shine

Equivalents extend TP 304 use:

• Food: JIS SUS304 for Asian tanks; EN for EU dairy.
• Chemical: BS 304S31 for UK piping; GB for Chinese.
• Architecture: DIN 1.4301 for European facades.
• General: ISO for global fab.

Gangsteel’s equivalents in 300+ projects.

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7. How to Source and Verify Equivalents

• Sourcing: Mill like Gangsteel for dual-certs.
• Verification: MTCs with PMI/A262.
• Testing: In-house IGC, E8 mechanics.
• Customization: Low C cuts.

Contact for samples.

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8. Price Comparison of Equivalents

November 2025 (USD/kg FOB):

• ASTM TP 304: 3-5
• EN 1.4301: 3.2-5.2
• JIS SUS304: 2.8-4.8
• BS 304S31: 3-5
• GB 06Cr19Ni10: 2.5-4.5

Ni ~$17k/ton affects; discounts bulk.

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9. FAQ on ASTM A240 TP 304 Equivalents

Q: Is EN 1.4301 a direct equivalent to ASTM TP 304?

A: Yes, EN 1.4301 (X5CrNi18-10) is a close match with similar low carbon (≤0.07%) and Cr-Ni balance for equivalent corrosion resistance (PREN 18-20) and weldability; it's fully interchangeable for general applications per ISO 15510, with tensile strength ≥515 MPa aligning, though EN has slightly narrower Ni (8.0-10.5%) which may affect stability in some reducing environments—common in EU for PED compliance.

Q: Can JIS SUS304 replace ASTM TP 304?

A: Absolutely, JIS SUS304 offers matching chemistry (C ≤0.08%, Cr 18.0-20.0%, Ni 8.0-10.5%) and properties per JIS G4305, providing the same ambient corrosion resistance and formability; it's widely used in Asian manufacturing for seamless substitution in pressure vessels or tubing, with yield ≥205 MPa equivalent, but confirm for specific JIS vs ASTM code requirements in international projects.

Q: What’s the difference between ASTM TP 304 equivalents and 304L?

A: ASTM TP 304 equivalents like EN 1.4301 have carbon ≤0.08% for balanced strength and weldability, while 304L equivalents (e.g., EN 1.4307) cap carbon at ≤0.03% for superior IGC resistance in as-welded state; choose TP 304 types for applications needing slightly higher yield (≥205 MPa vs ≥170 MPa) without extreme weld concerns, and 304L for heavy welding to avoid sensitization.

Q: Are there Chinese equivalents to ASTM TP 304?

A: Yes, GB 06Cr19Ni10 is a close match with similar carbon (≤0.08%) and Cr-Ni balance per GB/T 20878, offering equivalent corrosion resistance in mild acids and atmospheres; it's cost-effective for Asian markets and fully interchangeable in general fabrication, but for ASME-coded vessels, dual-certification to ASTM is recommended to ensure compliance with pressure standards.

Q: How to test if an equivalent matches ASTM TP 304?

A: Test chemistry via PMI for carbon ≤0.08% and Cr/Ni levels; mechanicals per ASTM E8 for tensile/yield; corrosion via ASTM A262 for IGC; third-party labs like SGS can verify, ensuring the equivalent performs in mild corrosives without failure.

Q: Is BS 304S31 equivalent to ASTM TP 304?

A: Yes, BS 304S31 aligns with EN 1.4301 and offers matching carbon and properties per BS EN 10088, providing the same corrosion resistance for UK-based projects; it's interchangeable for pressure vessels under BS standards, with elongation ≥40% and hardness ≤201 HB mirroring ASTM requirements.

Q: What about AFNOR equivalents for ASTM TP 304?

A: AFNOR Z7CN18-09 is a French equivalent with similar composition (C ≤0.07%, Cr 17.0-19.0%, Ni 8.5-10.5%) per NF EN 10088-3, delivering equivalent corrosion and mechanical performance; it's suitable for nuclear or chemical apps in France, fully matching ASTM TP 304 in formability and often used in European projects.

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11. Why Choose Gangsteel for TP 304 and Equivalents?

Gangsteel’s 25+ years, 500+ experts deliver E-E-A-T. 120k tons/year, ABS/TUV certified. Custom low C, global delivery. Explore ASTM A 240 Gr 316L.

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12. Conclusion

ASTM A240 TP 304 equivalents like EN 1.4301, JIS SUS304, and BS 304S31 offer versatile 18-8 alternatives for weldable, mild corrosion duties in food and chemical. For compliance or savings, these grades maintain reliability. Gangsteel bridges with certified materials—contact for quotes on TP 304 equivalents or ASTM A 240 Gr 321. Select strategically.