P355NH equivalent grades: ASTM, EN, JIS, GB, DIN
P355NH is weldable fine-grain normalized steel for pressure purposes, elevated temperature specified in EN 10028-3. Below, the grades that can replace it — 6 standard systems in all — with the deciding limit named for each one rather than left to be looked up. The full P355NH data sheet carries the composition and mechanical tables.
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P355NH is cross-certified with IS 2041 R355, SPV355: the composition windows overlap closely enough that one certificate satisfies the other. A516 Grade 70, A537 Cl. 1, A737 Gr. B and 4 more differ by one requirement, which is a line on the order rather than a redesign. P355QH serves in the same applications, but the composition differs enough that the engineer signs it off, not the buyer. The table holds 1 in IS (India), 1 in JIS (Japan), 3 in ASTM / ASME, 3 in EN (European), 1 in GB/T (China), 1 in GOST (Russia/CIS).
Cross-reference table
| Grade | System | Match | Why / differences |
|---|---|---|---|
| IS 2041 R355 | IS (India) | Identical | IS 2041 (pressure-vessel plate) grade R355. |
| SPV355 | JIS (Japan) | Identical | JIS G3115 SPV355: yield 355 MPa, Rm 520–640 MPa; SPV355N (normalized). |
| A516 Grade 70 | ASTM / ASME | Near | ASTM/ASME A516-70: yield 260 MPa, Rm 485–620 MPa, C ≤ 0.27–0.31 — the common US vessel plate, but lower yield and no micro-alloy fine-grain guarantee. Order normalized with Charpy (S5) for a closer match. |
| A537 Cl. 1 | ASTM / ASME | Near | Normalized C-Mn-Si vessel plate: yield 345 MPa (≤ 65 mm), Rm 485–620 MPa — the nearest US equivalent by yield and condition. |
| A737 Gr. B | ASTM / ASME | Near | Nb micro-alloyed vessel plate, yield 345 MPa, Rm 485–620 MPa. |
| P355GH | EN (European) | Near | 1.0473 (ex 19Mn6): EN 10028-2 non-fine-grain grade with the same strength; higher C (0.22), CEV 0.45. |
| S355N | EN (European) | Near | EN 10025-3 structural fine-grain twin without pressure-equipment certification. |
| Q345R / 16MnDR | GB/T (China) | Near | GB/T 713 Q345R: yield 345 MPa, Rm 510–640 MPa, impact 0 °C; 16MnDR (GB/T 3531) for −40 °C ≈ P355NL1. |
| 09G2S | GOST (Russia/CIS) | Near | GOST 5520 09G2S vessel plate: yield 305–345 MPa, Rm 460–490 MPa. |
| P355QH | EN (European) | Functional | EN 10028-6 quenched & tempered version for thick sections. |
Identical, near and functional are defined once on the grade index; the reason column below says which limit differs in each case.
P355NH in IS (India)
- IS 2041 R355 — Identical IS 2041 (pressure-vessel plate) grade R355.
P355NH in JIS (Japan)
- SPV355 — Identical JIS G3115 SPV355: yield 355 MPa, Rm 520–640 MPa; SPV355N (normalized).
P355NH in ASTM / ASME
- A516 Grade 70 — Near ASTM/ASME A516-70: yield 260 MPa, Rm 485–620 MPa, C ≤ 0.27–0.31 — the common US vessel plate, but lower yield and no micro-alloy fine-grain guarantee. Order normalized with Charpy (S5) for a closer match.
- A537 Cl. 1 — Near Normalized C-Mn-Si vessel plate: yield 345 MPa (≤ 65 mm), Rm 485–620 MPa — the nearest US equivalent by yield and condition.
- A737 Gr. B — Near Nb micro-alloyed vessel plate, yield 345 MPa, Rm 485–620 MPa.
P355NH in EN (European)
- P355GH — Near 1.0473 (ex 19Mn6): EN 10028-2 non-fine-grain grade with the same strength; higher C (0.22), CEV 0.45.
- S355N — Near EN 10025-3 structural fine-grain twin without pressure-equipment certification.
- P355QH — Functional EN 10028-6 quenched & tempered version for thick sections.
P355NH in GB/T (China)
- Q345R / 16MnDR — Near GB/T 713 Q345R: yield 345 MPa, Rm 510–640 MPa, impact 0 °C; 16MnDR (GB/T 3531) for −40 °C ≈ P355NL1.
P355NH in GOST (Russia/CIS)
- 09G2S — Near GOST 5520 09G2S vessel plate: yield 305–345 MPa, Rm 460–490 MPa.
Superseded names for P355NH
- WStE355 — DIN 17102 (withdrawn 1996): W = warmfest (elevated temperature) → P355NH.
- StE355 — DIN 17102: → P355N (1.0562).
- TStE355 — DIN 17102: T = tieftemperatur → P355NL1 (−40 °C).
- EStE355 — DIN 17102: → P355NL2 (−50 °C).
- Fe E 355 KG / KW / KT — EN 10028-3:1992 (ISO 9328)
- BS 1501-225-490B / LT — BS 1501 (withdrawn)
Key data for P355NH
Full composition, mechanical properties by thickness, heat treatment and applications for P355NH →
Verified against EN 10028-3:2017. Last checked: September 2026.