Stainless steel 1Cr18Ni9Ti is an ordinary stainless steel (SUS321), and its tissue type is austenitic. 1, 18 and 9 in 1Cr18Ni9Ti represent the contents of carbon (‰), chromium (%) and nickel (%). It is a brand of stainless steel in China.

Worldwide equivalents of grade: 1Cr18Ni9Ti

country / regionChinaGermanyJapanFranceEnglandUSAISO
Grade1Cr18Ni9TiX6CrNiTi18 -10SUS 321Z10CNT18-11321S20AISI321X7CrNiTi18-10
Chemical Composition of 1Cr18Ni9Ti Steel Material
%0.12MAX1.00MAX2.00MAX0.030 MAX0.035 MAX17.00-19.008.00-11.005*(C%-0.02)~0.80%

Mechanical properties of 1Cr18Ni9Ti

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated ConditionBrinell hardness (HBW)
496 (≥)144 (≥)134143Solution and Aging, Annealing, Ausaging, Q+T,etc112

Mechanical properties of 1Cr18Ni9Ti:

Tensile strength σ b(MN/m2) ≥550

Yield strength σ s(MN/m2) ≥200

Elongation δ 5(%)〉=40

Heat treatment:

  1. 固溶920~1150℃快冷

2)根据需方要求可进行稳定化处理, 热处理温度为850~930℃

1) Solid solution, 920 ~ 1150 ℃ quick cooling

2) Stabilization treatment can be carried out according to the requirements of the demander, and the heat treatment temperature is 850 ~ 930 ℃

1Cr18Ni9Ti Steel Application


1Cr18Ni9Ti is applied to outdoor machines in chemical, coal and petroleum industries with high grain boundary corrosion resistance, heat-resistant parts of building materials and parts with difficulty in heat treatment, such as oil waste gas combustion pipeline, engine exhaust pipe, boiler shell, heat exchanger, heating furnace parts, silencing parts for diesel engine, boiler pressure vessel, chemical transport vehicle, expansion joint Spiral welded pipe for gas furnace pipe and dryer

1Cr18Ni9Ti products
Product typeProductsDimensionProcessesDeliver Status
Plates / SheetsPlates / Sheets0.08-200mm(T)*W*LForging, hot rolling and cold rollingAnnealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel BarRound Bar, Flat Bar, Square BarΦ8-1200mm*LForging, hot rolling and cold rolling, CastBlack, Rough Turning, Shot Blasting,
Coil / StripSteel Coil /Steel Strip0.03-16.0x1200mmCold-Rolled & Hot-RolledAnnealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / TubesSeamless Pipes/Tubes, Welded Pipes/TubesOD:6-219mm x WT:0.5-20.0mmHot extrusion, Cold Drawn, WeldedAnnealed, Solution and Aging, Q+T, ACID-WASHED


Equivalent Grade

Chemical Composition

Mechanical Properties

Physical Properties

Heat Treatment Specification

Shapes and dimensions

Delivery Condition