Stainless Steel JIS G4304

Standard Designation 钢号

Density

 密度 (kg/mm·m2)

JIS G4304 / 4305

 304 / 304L / 304N1 / 304N2 / 304LN / 304J1 / 304J2

7.93
316 / 316L / 316N / 316LN / 316J1 / 316J1L / 316Ti

7.98

ASTM / ASME / DIN All Grades

8.07

Surface Finished to JIS G4305 : 1991
Cold rolled Stainless Steel plates, sheets and Strips
日本标准

Symbol of Finish

 表面处理钢号

Finishing Method 

表面处理方法
No. 1 Hot Rolled, annealed, descaled
No. 2D Cold Rolled, annealed, descaled, pickling, or finally dull rolled
No. 2B Cold Rolled, annealed, descaled, pickling, lastly slightly brightened by cold rolling
BA Highly reflective finish produced by bright heat treatment after cold rolling
No. 3 Immediate polished finish with No. 100 to No. 120 coarse abrasives specified in JIS R6001
No. 4 Standard polished finish with No. 150 to No. 180 finer abrasives specified in JIS R6001
No. 240 Polished finish with No. 240 abrasives specified in JIS R6001
No. 320 Polished finish with No. 320 abrasives specified in JIS R6001
No. 400 High lust polished finish with No. 400 buffing sisal cloth specified in JIS 6001
HL Polished to give continuous polishing streaks by using abrasive of suitable grain size
Silver Soft Surface roughness increased by rolling. Rougher than No. 2D to minimize gloss
No. 7 Semi-mirror polished
No. 8 Mirror polished
Embossing Embossed with roll
Etching Patterned by chemical treatment
Hard Adequately strengthened by cold rolling
Color Colored by chemical treatment / coated with acrylic resin or fluoro resin

CORROSION RESISTANCE DATA - stainless Steel

Solution

Concentration 

Temperature

Type of Stainless Steel

410

430

304

316

  Acetic Acid CH3COOH
0 ~ 100%
20°C
U.A.
U.A.

  Acetone (CH3)2CO
20°C
S.A.
U.A.
U.A.

  Ammonium Sulfate (NH4)2SO4
5%
20°C
U.A.
U.A.
U.A.

  Benzol C6H6
20°C
S.A.
U.A.
S.A.

  Boric Acid B(OH)3
SATURATED
Boiling Point
U.A.1)
U.A.1)
U.A.1)

  Butter & Milk
HOT
  
U.A.
U.A.

  Butyric Acid MeCH2.CH2.COOH
5%
20°C
U.A.
U.A.
U.A.
U.A.

  Carbon Tetrachloride CCI4
PURE
U.A.
U.A.
U.A.

  Carbonic Acid Gas CO2
20°C
U.A.
U.A.
U.A.
U.A.

  Chlorine CI2
20°C
S.A.
S.A.
U.A.
100°C
A
A
A

  Chromic Acid H2CrO4
10%
20°C
S.A.
S.A.
Boiling Point
A
S.A.
S.A.

  Citric Acid HO.C(COOH)(CH2COOH)
15%
Boiling Point
S.A.
U.A.
U.A.

  Crude Oil (Petroleum)
20°C
U.A.6)
U.A.6)
U.A.6)
U.A.6)

  Ether (C2H5)2O
20°C
U.A.
U.A.
U.A.

  Ethyl Alcohol C2H5OH
20°C
U.A.
U.A.
U.A.
  Ferric Chloride FeCI3
1%
20°C
U.A.1)
U.A.1)
U.A.1)
  Fluoric Acid HF
  
20°C
A
A
A
A
  Fruit & Vegetable juice
  
HOT
  
U.A.
U.A.
  Gasoline (Petrol)
  
20°C
U.A.
U.A.
U.A.
U.A.
  Hydrochloric Acid HCI
£ 0.2%
  
  
S.A.1)
S.A.1)
> 0.2%
20°C
  
A1)
A1)
  Hydrogen Peroxide H2O2
30%
20°C
U.A.~S.A.4)
U.A.~S.A.4)
U.A.4)
U.A.
  Lactic Acid C3H6O3
5%
20°C
S.A.
S.A.
U.A.
U.A.
  Methyl Alcohol CH3OH
  
20°C
  
U.A.5)
U.A.5)
U.A.5)
  Milk
  
60°C
  
U.A.
U.A.
  Mineral Oil
20°C
U.A.
U.A.
U.A.
  Nitric Acid HNO3
1 ~ 20%
20°C
U.A.
U.A.
U.A.
U.A.
Boiling Point
S.A.
U.A.
U.A.
U.A.
40 ~ 60%
20°C
S.A.
S.A.
U.A.
U.A.
Boiling Point
A
S.A.
U.A.2)
U.A.2)
  Oxalic Acid HOOC-COOH
10%
20°C
U.A.
U.A.
  Phosphoric Acid H3PO4
80%
20°C
S.A.
U.A.
Boiling Point
A
S.A.
  Potassium Bichromate K2Cr2O7
25%
Boiling Point
U.A.
U.A.
  Potassium Permanganate KMnO4
10%
Boiling Point
U.A.
U.A.
  Sliver Nitrate AgNo3
5%
20°C
U.A.
U.A.
U.A.
  Sodium Carbonate Na2CO3
50%
Boiling Point
U.A.
U.A.
  Sodium Chloride NaCI
10%
Boiling Point
U.A.1)
U.A.1)
U.A.1)
  Sodium Sulfate Na2SO4
5%
20°C
U.A.
U.A.
U.A.
  Stearic Acid CH3(CH2)16COOH
SATURATED
100°C
S.A.
U.A.
U.A.
  Sugar Syrup
CONCENTRATED
100°C
U.A.
U.A.
U.A.
  Sulphuric Acid H2SO4
£ 0.25%
20°C
U.A.
U.A.
Boiling Point
A
S.A.
30 ~ 60%
20°C
S.A.
S.A.
Boiling Point
A
A
95 ~ 100%
20°C
U.A.
U.A.
100°C
A
A
  Sulfurous Acid SO(OH)2
10%
20°C
A
A
S.A.
U.A.
Boiling Point
S.A.
S.A.
  Sulfurous Acid Gas SO(OH)2
WET
20°C
A
A
U.A.~S.A.4)
U.A.3)
  Tartaric Acid C4H6O6
50%
20°C
S.A.
S.A.
U.A.
U.A.

  Vegetable Oil
20°C
S.A.
S.A.
S.A.

U.A. = 0.1mm/year, unaffected ; S.A. = 0.1 to 1mm/year, slightly affected ; A = 1mm/year, affected

Notes :

1) Susceptible to pitting corrosion.
2) Affected under high pressure.
3) Take care when H2SO4 coexists.
4) Affected when involving H2SO4.
5) Pitting at high temperature.
6) Affected by impurities during refining.