Cov tshuaj muaj pes tsawg leeg ntawm ASTM A992 (ASTM A992 / A992M) thiab Q355B (GB / T 1591) yog nruj tswj hwm thiab zoo sib xws, ua kom cov khoom sib npaug thiab ua haujlwm zoo ib yam:
| Chemical Element | ASTM A992 (ASTM A992 / A992M) | Q355B (GB/T 1591) | Lub luag haujlwm hauv Kev Ua Haujlwm |
|---|---|---|---|
| Cov pa roj carbon (C) | Max 0.23% | Max 0.24% | Muab lub hauv paus muaj zog; capped kom tsis txhob brittleness thiab xyuas kom meej weldability. Qhov sib txawv ntawm 0.01% tsis muaj kev cuam tshuam rau kev tsim khoom. |
| Manganese (Mn) | 1.00–1.65% | 1.00–1.60% | Lub zog tseem ceeb; tsim cov kev daws teeb meem nrog hlau los txhawb cov txiaj ntsig / tensile lub zog. A992 qhov siab dua me ntsis (1.65% vs. 1.60%) txhim kho hardenability yam tsis txo cov ductility. |
| Silicon (Si) | 0.15–0.40% | 0.15–0.40% | Deoxidizes molten hlau kom txo cov voids; zoo tib yam ntau yam kom zoo ib yam soundness thiab corrosion kuj. |
| Phosphorus (P) | Max 0.035% | Max 0.035% | Tswj kom tsis txhob qis -kub brittleness (segregates ntawm cov ciam teb yog tias ntau dhau). |
| Sulfur (S) | Max 0.035% | Max 0.035% | Txwv kom tsis txhob "kub shortness" (nkig hlau sulfide tsim thaum dov / vuam). |
| Vanadium (V) | 0.01-0.08% (yeem) | 0.02-0.15% (yeem) | Microalloy ntxiv rau refine grain qauv; ob qho tib si kev txhawb nqa lub zog tsis muaj kev cuam tshuam weldability. |
Cov kev txwv zoo ib yam rau cov pa roj carbon, silicon, phosphorus, thiab sulfur - cov ntsiab lus cuam tshuam rau lub zog thiab kev ua haujlwm tau zoo - xyuas kom ASTM A992 thiab Q355B coj zoo ib yam hauv kev tsim khoom thiab kev pabcuam. Manganese thiab vanadium variances yog qhov tsawg heev thiab nyob rau hauv qhov kev pom zoo rau kev siv cov qauv, tsis muaj kev cuam tshuam tsis zoo rau kev ua haujlwm.