ASTM A312 304 316 cold-drawing stainless steel pipe

Name

Stainless Steel Seamless & Welded Tube &Pipe

Items

Square tubes, round tubes, oval pipes, special shaped pipes,

empaistic pipes, fittings

Standard

ASTM A312,

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

10.29mm--812.80mm

Thickness

1.0mm - 60.00mm

Length

6m or as customers' request

Tolerance

a) Outer Diameter: +/- 0.2mm

b) Thickness: +/- 10%

c) Length: +/- 5mm

Surface

180G, 240G, 320G Satin / Hairline

400G, 600G Mirror finish

Application

handrail,railing, staircase, weldmesh 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

316L

430

C

≤0.15

≤0.15

≤0.08

≤0.035

≤0.12

Si

≤1.00

≤1.00

≤1.00

≤1.00

≤1.00

Mn

5.5-7.5

7.5-10

≤2.00

≤2.00

≤1.00

P

≤0.06

≤0.06

≤0.045

≤0.045

≤0.040

S

≤0.03

≤0.03

≤0.030

≤0.030

≤0.030

Cr

13-15

14-17

18-20

16-18

16-18

Ni

0.7-1.1

3.5-4.5

8-10.5

10-14

Mo

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

Surface finish

Characteristics and application

No.2B

The surface brightness and flatness of no2B is better than no2D. then through a special surface treatment to improve its mechanical properties,No2B could nearly satisfy comprehensive uses.

No.3

Polished with abrasive belt of git#100-#200, have better brightness with discontinuous coarse stria, used as inner and external ornaments for building, electrical appliances and kitchen utensils etc.

No.4

Polished with abrasive belt of grit #150-#180,have better brightness with discontinuous coarse stria, but thinner than No3, are used as bathtub buildings inner and external ornaments electrical appliances kitchen utensils and food processing equipment etc.

HL

Polished with abrasive belt of grit #150-#320 on the NO.4 finish and has continuous streaks, mainly used as buildings ornaments elevators, door of building, frontal plate etc.

BA

Cold rolled, bright annealed and skin-passed, the product have excellent brightness and good reflexivity like mirror, kitchen apparatus, ornament etc.

8K

The product have excellent brightness and prefer reflexivity can to be the mirror.