Name

Welded stainless steel pipes

Standard

GB/T 12770,GB/T 12771,GB/T 21832,ASTM   A554, A249, A269 and A270

Material   Grade

201:   Ni 0.8%~1%

202:   Ni 3.5%~4.5%

304:   Ni 8%, Cr 18%

316:   Ni 10%, Cr 18%

316L:   Ni10%~14%

430:   Cr16%~18%

Outer   Diameter

10-1800mm

Thickness

0.3-100mm

Length

6m   or as customers' request

Tolerance

a)   Outer Diameter: +/- 0.2mm

b)   Thickness: +/- 0.02mm

c)   Length: +/- 5mm

Surface

180G,   240G, 320G Satin / Hairline 400G, 600G Mirror finish

Application

handrail,   railing, staircase, weld mesh screen, door, window, balcony, fence, bench, furniture,   etc

Test

Squash   test, extended test, water pressure test, crystal rot test, heat treatment,   NDT

Chemical   Composition of Material

Material   Composition

201

202

304

316

316L

430

C

≤0.15

≤0.15

≤0.08

≤0.08

≤0.035

≤0.12

Si

≤1.00

≤1.00

≤1.00

≤1.00

≤1.00

≤1.00

Mn

5.5-7.5

7.5-10

≤2.00

≤2.00

≤2.00

≤1.00

P

≤0.06

≤0.06

≤0.045

≤0.045

≤0.045

≤0.040

S

≤0.03

≤0.03

≤0.030

≤0.030

≤0.030

≤0.030

Cr

13-15

14-17

18-20

16-18

16-18

16-18

Ni

0.7-1.1

3.5-4.5

8-10.5

10.0-14.0

10.0-14.0

**

Mo

**

**

**

2.0-3.0

2.0-3.0

**

Mechanical   Property

Material   Item  

201

202

304

316

Tensile   Strength

≥535

≥520

≥520

≥520

Yield   Strength

≥245

≥205

≥205

≥205

Extension

≥30%

≥30%

≥35%

≥35%

Hardness   (HV)

<105

<100

<90

<90