Product Description
Background
Grade **4 is the standard "*8/8" stainless; it is the most
versatile and most widely used stainless steel, available in a
wider range of products, forms and finishes than any other. It has
excellent forming and welding characteristics. The balanced
austenitic structure of Grade **4 enables it to be severely deep
drawn without intermediate annealing, which has made this grade
dominant in the manufacture of drawn stainless parts such as sinks,
hollow-ware and saucepans. For these applications it is common to
use special "**4DDQ" (Deep Drawing Quality) variants. Grade **4 is
readily brake or roll formed into a variety of components for
applications in the industrial, architectural, and transportation
fields. Grade **4 also has outstanding welding characteristics.
Post-weld annealing is not required when welding thin
sections.
Grade **4L, the low carbon version of **4, does not require
post-weld annealing and so is extensively used in heavy gauge
components (over about 6mm). Grade **4H with its higher carbon
content finds application at elevated temperatures. The austenitic
structure also gives these grades excellent toughness, even down to
cryogenic temperatures.
Key Properties
These properties are specified for flat rolled product (plate,
sheet and coil) in ASTM A**0/A**0M. Similar but not necessarily
identical properties are specified for other products such as pipe
and bar in their respective specifications.
Composition
Typical compositional ranges for grade **4 stainless steels are
given in table 1.
Table 1. Composition ranges for **4 grade stainless steel
Grade
C
Mn
Si
P
S
Cr
Mo
Ni
N
**4
min.
max.
-
0.*8
-
2.0
-
0.*5
-
0.**5
-
0.**0
*8.0
*0.0
-
8.0
*0.5
-
0.*0
**4L
min.
max.
-
0.**0
-
2.0
-
0.*5
-
0.**5
-
0.**0
*8.0
*0.0
-
8.0
*2.0
-
0.*0
**4H
min.
max.
0.*4
0.*0
-
2.0
-
0.*5
*0.**5
-
0.**0
*8.0
*0.0
-
8.0
*0.5
-
Mechanical Properties
Typical mechanical properties for grade **4 stainless steels are
given in table 2.
Table 2. Mechanical properties of **4 grade stainless steel
Grade
Tensile Strength (MPa) min
Yield Strength 0.2% Proof (MPa) min
Elongation (% in *0mm) min
Hardness
Rockwell B (HR B) max
Brinell (HB) max
**4
**5
**5
*0
*2
**1
**4L
**5
**0
*0
*2
**1
**4H
**5
**5
*0
*2
**1
**4H also has a requirement for a grain size of ASTM No 7 or
coarser.
Physical Properties
Typical physical properties for annealed grade **4 stainless steels
are given in table 3.
Table 3. Physical properties of **4 grade stainless steel in the
annealed condition
Grade
Density (kg/m3)
Elastic Modulus (GPa)
Mean Coefficient of Thermal Expansion (mm/m/°C)
Thermal Conductivity (W/m.K)
Specific Heat ****0°C (J/kg.K)
Electrical Resistivity (nW.m)
****0°C
****5°C
****8°C
at **0°C
at **0°C
**4/L/H
***0
**3
*7.2
*7.8
*8.4
*6.2
*1.5
**0
**0
Grade Specification Comparison
Approximate grade comparisons for **4 stainless steels are given in
table 4.
Table 4. Grade specifications for **4 grade stainless steel
Grade
UNS No
Old British
Euronorm
Swedish SS
Japanese JIS
BS
En
No
Name
**4
S****0
**4S*1
*8E
1.***1
X5CrNi****0
***2
SUS **4
**4L
S****3
**4S*1
-
1.***6
X2CrNi****1
***2
SUS **4L
**4H
S****9
**4S*1
-
1.***8
X6CrNi****1
-
-
These comparisons are approximate only. The list is intended as a
comparison of functionally similar materials not as a schedule of
contractual equivalents. If exact equivalents are needed original
specifications must be consulted.
Possible Alternative Grades
Possible alternative grades to grade **4 stainless steels are given
in table 5.
Table 5. Possible alternative grades to **4 grade stainless
steel
Grade
| Country: |
China |
| Model No: |
HKA20908500B10
|
| FOB Price: |
2700 ~ 3165 / Metric Ton ( Negotiable ) (Negotiable)
Get Latest Price
|
| Place of Origin: |
CHINA |
| Price for Minimum Order: |
2700 per Metric Ton |
| Minimum Order Quantity: |
25 Metric Ton |
| Packaging Detail: |
export standard |
| Delivery Time: |
PROMPT |
| Supplying Ability: |
6000 Metric Ton per Month |
| Payment Type: |
T/T, L/C |
| Product Group : |
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