1. ASTM A671 CB60 Class 31 steel yeeb nkab yog dab tsi?
A premium-qib carbon-manganese EFW yeeb nkabtsim rauultra-siab-siab (UHP) thiab kev pabcuam cryogenic, ua raws liASTM A671-25 Cov khoom siv raw khoom.
CB 60: Carbon -manganese steel (0.25% max C, 1.20% Mn) nrogTxhim khu kev cuam tshuam toughness(Charpy kuaj ntawm-30 ° F / -34 ° C).
Chav Kawm 31: Yam tsawg kawg nkaus yield zog ntawm31 ksi (214 MPa), qib siab tshaj plaws hauv CB60 qib, optimized rau huab cua txias.
2. Cov ntawv thov tseem ceeb hauv Q4 2025?
Kev hloov hluav taws xob: UHP hydrogen thauj pipelines (blends<40% H₂).
Roj & Roj: Dej tob ntws thiab risers (tsis yog- qaub, perAPI 5L-2025 Cov Lus Qhia).
Fais fab nroj tsuag: Supercritical steam lines (>2,000 psi).
3. Technical Advancements vs. Class 30?
Lub zog: 3.3% siab dua yield zog (31 vs . 30 ksi), ua kom muaj zog7-10% phab ntsa thickness txo.
Fracture Control: Yuav tsum tauCTOD xeem (Crack Tip Opening Displacement) for thicknesses >1 nyob rau hauv (25.4 mm).
Nqi: 12–15% premium tshaj Class 30 (2025 avg:3,000-3,000-3,500/ton).
4. 2025 Kev Ntsuam Xyuas & Ua Raws Li Kev Hloov Kho Tshiab
NDT: Phaseed -array UT + digital radiography(AI- pab tshawb nrhiav qhov tsis zoo).
Traceability: Quantum{0}}encrypted MTRsnrog IoT-enabled tiag - lub sijhawm saib xyuas.
Sustainability: Sib ntsibTS EN ISO 14044-2025Kev ntsuam xyuas lifecycle rau qis -carbon infrastructure.
5. Kev Muag Khoom & Cov Qauv
Thawj Standard: ASTM A671-25 Cov khoom siv raw khoom(Nqe 16 rau Chav Kawm 31).
Lwm txoj kev:
TS EN 10217-6 P500NH(EU, -60℃cuam tshuam kuaj).
JIS G3460 STPA27(Nyiv, xav kom H₂ validation).
