| 2 | Iron, steel and alloy | 11 | C,S | ISO 15350:2000 |
| 12 | C | Steel and iron - Determination of total carbon content - Infrared absorption method after combustion in an induction furnace GB/T 223.86-2009, |
| ISO 9556:1989 |
| Unalloyed Steel-Determination of low carbon content-Part 2:Infrared absorption method after combustion in an induction furnace (With preheating) GB/T 20126-2006, |
| ISO 15349-2:1999 |
| 13 | S | Steel and iron - Determination of high sulfur content - Infrared absorption method after combustion in an induction furnace GB/T 223.83-2009 |
| ISO 13902:1997 |
| Steel and iron - Determination of sulfur content - Infrared absorption method after combustion in an induction furnace GB/T 223.85-2009 |
| ISO 4935:1989 |
| 14 | Si,Mn,P,Ni,Cr,Mo,Cu,V,Co,Ti,Al | Low-alloy steel-Determination of multi-element contents-Inductively coupled plasma atomic emission spectrometric method GB/T 20125-2006 |
| 15 | C,S,Mn,Si,P,Cr,Ni,W,Mo,V,Al,Ti,Cu,Nb,Co,B,Zr,As,Sn | carbon and low-alloy steel-determination of multi-element contents- spark discharge atomic emission spectrometric method(routine method) GB/T 4336-2016 |
| 16 | C,S,Mn,Si,P,Cr,Ni,W,Mo,Al,Ti,Cu,Nb,V,Co,B,As,Sn,Pb | Stainless steel - Determination of multi-element contents - Spark discharge atomic emission spectrometric method (Routine method) GB/T 11170-2008 |
| 17 | O | Steel and Iron-Determination of oxygen content-The pulse heating inert gas fusion-infra-red absorption method GB/T 11261-2006 |
| Chemical analysis of ferrous materials — Determination of oxygen content in steel and iron — Part 2: Infrared method after fusion under inert gas EN 10276-2:2003 |
| 18 | N | Steel and iron-Determination of nitrogen content –Thermal conductimetric method after fusion in a current of inert gas (Routine method) GB/T 20124-2006 |
| ISO 15351:1999 |
| 19 | H | Steel and iron-Determination of hydrogen content-Inert gas impulse fusion heat conductivity method GB/T 223.82-2007 |
| 20 | Si,Mn,P,S,Cu,Al,Cr,Mo,V,Ti,W,Nb | Iron and steel-Determination of multi-element contents-X-ray fluorescence spectrometry (Routine method) GB/T223.79-2007 |
| 21 | Al,B | Iron,steel and alloy. Determination of total aluminum and total boron contents. Microwave digestion-inductively coupled plasma mass spectrometric method GB/T 223.81-2007 |
| 22 | Fe | Iron powder-Determination of iron content-Potassium dichromate titration method GB/T 223.7-2002 |
