Stainless Steel 904L Technical details By wilsonpipeline.com

Stainless Steel 904L is a low carbon high alloy austenitic stainless steel, with an chromium, nickel, molybdenum and copper content,  which is widely used in applications where the corrosion properties of  Stainless Steel 316L & Stainless Steel 317L are not adequate. although originally develop for greatly improved resistance to strong reducing acids, particularly sulphuric acid. It also has an very high resistance to a wide range of  environments. This feature has been verified that it is very successful after many years of practical applications, which has results that Stainless Steel 904L has been standardized in many countries.

Characteristics:

1. The high Mo and the addition of copper to this grade gives it greatly improved resistance to strong reducing acids, particularly aspheric acid

2. It is highly resistant to chloride attack, both pitting crevice corrosion and stress corrosion crashing

3. Good machine ability and weld ability

4. The austenitic structure also gives this grade excellent  toughness, even down to cryogenic temperatures 

Market applications:

1. Offshore, Oil and gas equipment

2. Stainless Steel Pipe Fittings

3. Chemical industry

4. Seawater cooling equipment

5. Stainless Steel Flanges

6. Aircraft piston engine manifolds and exhaust stacks

7. Stainless Steel Pipes
   

8. Control and instrumentation

9. Pharmaceutical

10. Pulp and paper industry

Technical detailsTechnical composition (%)

Fe

Cr

Ni

Mo

Mn

Cu

Si

P

N

C

S904Lmin

Bal.

19.0

23.0

4.0

–

1.0

0.045

–

–

–

– max

–

23.0

28.0

5.0

2.0

2.0

1.00

0.045

0.10

0.020

0.015Mechanical properties

904LTensile strenght (mpa, min)

490 – 700Yield strength (0.2% offset mpa, min)

220Elongation (%, min)

35Density / weight (g / cm3 / kg)

8.05

TENSILE REQUIREMENTS Tensile Strength (KSI) 70  Yield Strength (KSI) 25 KSI can be converted to MPA (Megapascals) by multiplying by 6.895.

AVAILABILITY

904L Stainless Steel Elbows 904L Stainless Steel Angle Bars 904L Stainless Steel Bars 904L Stainless Steel Pipe Fittings 904L Stainless Steel Tubes 904L Stainless Steel Flanges 904L Stainless Steel U Tubes 904L Stainless Steel Concentric Reducer 904L Stainless Steel Pipes 904L Stainless Steel Seamless Pipe

Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)