Centerway Steel Co., Ltd
Centerway Steel Co., Ltd
Centerway Steel Co., Ltd
carbon steel plate,steel coil,stainless steel plate,china export service provider.
carbon steel plate,steel coil,stainless steel plate,china export service provider.
About ASTM240
The ASTM A240 Plate corresponds to a specification that caters to chromium and chromium alloy steel grades such as 304 or 316. While the grade of steel utilized for alloy strictly depends on the application, namely the kind of chemical exposure, and primary characteristics of the application i.e. - tensile strength and resistance to corrosion. Suppose if the price is the key factor in the application, most suppliers prefer using grade 304 as the material grade for ASTM A240 Foils. Grade 304 offers moderate to good resistance to corrosion with good tensile properties. However, if the application is one that requires to withstand much stronger conditions, say like seawater, then grade 316 ASTM A240 Clad Sheet would be the preferred choice for marine engineering purposes. This being said, the weldability properties of both grade 304 and 316 are good. But the higher content of carbon in the alloy of Stainless Steel ASTM A-240 Sheet prevents the alloys from reaching their whole potential with regards to their welding characteristics.
ASTM A240 specification covers stainless steel plates, sheets and strips for pressure vessels and general applications. This specification covers chemical composition and mechanical properties for various grades of ferritic, austenitic, martensitic, duplex, super duplex and high moly stainless steel alloys. Boltport frequently uses sheets and plates of 304, 304l, 316, 316l, 321, 347, 309, 310, 316Ti, 317L, Xm-19, 904L, 409, 410, 430, Duplex S31803, S32205, Super Duplex S32750, S32760, S32550, High moly UNS S31254, Alloy 20, etc., conforming to ASTM A240 specification for manufacturing sheet metal washers for bolting assemblies.
Materials
|
A240 TYPE |
RAW MATERIAL |
|
304 |
18-8 Chromium Nickel Austenitic Stainless Steel |
|
UNS S31803 |
Ferritic / Austenitic Duplex Stainless Steel |
|
316L |
Low Carbon, Chromium Nickel Molybdenum Austenitic Stainless Steel |
|
UNS S32750 |
Ferritic / Austenitic Super Duplex Stainless Steel |
|
321 |
Titanium Stabalized 18-8 Chromium Nickel Austenitic Stainless Steel |
|
410 |
12% Straight Chromium Martensitic Stainless Steel |
|
UNS S31254 |
High Moly Austenitic Stainless Steel |
|
904L |
High Nickel Molybdenum Super Austenitic Stainless Steel |
Grades
|
Grade |
Raw Material |
|
304 |
18-8 Chromium Nickel Austenitic Stainless Steel |
|
304L |
Low Carbon, 18-8 Chromium Nickel Austenitic Stainless Steel |
|
316 |
Chromium Nickel Molybdenum Austenitic Stainless Steel |
|
316L |
Low Carbon, Chromium Nickel Molybdenum Austenitic Stainless Steel |
|
321 |
Titanium Stabalized 18-8 Chromium Nickel Austenitic Stainless Steel |
|
410 |
12% Straight Chromium Martensitic Stainless Steel |
|
904L |
High Nickel Molybdenum Super Austenitic Stainless Steel |
|
S31803 |
Ferritic / Austenitic Duplex Stainless Steel |
|
S32205 |
Ferritic / Austenitic Duplex Stainless Steel |
|
S32750 |
Ferritic / Austenitic Super Duplex Stainless Steel |
|
S32760 |
Ferritic / Austenitic Super Duplex Stainless Steel |
|
S31254 |
High Moly Austenitic Stainless Steel |
|
N08020 |
Nickel Iron Chromium Austenitic Stainless Steel |
Chemical Composition
|
Element |
Grade B5 |
Grade B6 |
Grade B7, 7M |
Grade B16 |
Grade B8 |
Grade B8M |
Grade B8T |
|
Carbon |
0.10 min |
0.08-0.15 |
0.37-0.49 |
0.36-0.47 |
0.08 |
0.08 |
0.10 min |
|
Manganese, max |
1.00 |
1.00 |
0.65-1.10 |
0.45-0.70 |
2.00 |
2.00 |
1.00 |
|
Phosphorus, max |
0.040 |
0.040 |
0.035 |
0.035 |
0.045 |
0.045 |
0.040 |
|
Sulfur, max |
0.003 |
0.030 |
0.040 |
0.040 |
0.030 |
0.030 |
0.030 |
|
Silicon |
1.00 |
1.00 max |
0.15-0.35 |
0.15-0.35 |
1.00 |
1.00 |
1.00 max |
|
Chromium |
4.0-6.0 |
11.5-13.5 |
0.75-1.20 |
0.80-1.15 |
18.0-20.0 |
16.0-18.0 |
4.00-6.00 |
|
Molybdenum |
0.40-0.65 |
-- |
0.15-0.25 |
0.50-0.65 |
-- |
2.00-3.00 |
0.40-0.65 |
|
Vanadium |
-- |
-- |
-- |
0.25-0.35 |
-- |
-- |
-- |
|
Aluminium, max |
-- |
-- |
-- |
0.015 |
-- |
-- |
-- |
Mechanical Properties
|
Bolt Grade |
Diameter, in. |
Tensile Strength, ksi |
Yield Strength ksi |
Elongation, % |
Reduction, % |
Hardness |
|
B5 |
Up to 4, inclusive |
100 |
80 |
16 |
50 |
-- |
|
B6 |
Up to 4, inclusive |
110 |
85 |
15 |
50 |
-- |
|
B7 |
2.5 and under |
125 |
105 |
16 |
50 |
321 HBW or 35 HRC |
|
Over 2.5 to 4 |
115 |
95 |
16 |
50 |
321 HBW or 35 HRC |
|
|
Over 4 to 7 |
100 |
75 |
18 |
50 |
321 HBW or 35 HRC |
|
|
B7M |
4 and under |
100 |
80 |
18 |
50 |
235 HBW or 99 HRB |
|
over 4 to 7 |
100 |
75 |
18 |
50 |
235 HBW or 99 HRB |
|
|
B16 |
2.5 and under |
125 |
105 |
18 |
50 |
321 HBW or 35 HRC |
|
Over 2.5 to 4 |
110 |
95 |
17 |
45 |
321 HBW or 35 HRC |
|
|
Over 4 to 8 |
100 |
85 |
16 |
45 |
321 HBW or 35 HRC |
|
|
B8, B8M, Class 1 |
All Diameters |
75 |
30 |
30 |
50 |
223 HBW or 96 HRB |
|
B8, B8T, Class 2 |
3/4 and under |
125 |
100 |
12 |
35 |
321 HBW or 35 HRC |
|
Over 3/4 to 1, inclusive |
115 |
80 |
20 |
45 |
321 HBW or 35 HRC |
|
|
Over 1 to 1 1/4, inclusive |
105 |
65 |
25 |
45 |
321 HBW or 35 HRC |
|
|
Over 1 1/4 to 1 1/2, inclusive |
100 |
50 |
30 |
45 |
321 HBW or 35 HRC |
|
|
B8M, Class 2 |
3/4 and under |
110 |
95 |
15 |
45 |
321 HBW or 35 HRC |
|
over 3/4 to 1, inclusive |
100 |
80 |
20 |
45 |
321 HBW or 35 HRC |
|
|
over 1 to 1 1/4, inclusive |
95 |
65 |
25 |
45 |
321 HBW or 35 HRC |
|
|
M30 to M36, inclusive |
620 |
345 |
30 |
45 |
321 HBW or 35 HRC |
For more detail:pls feel free contact sales@ctwsteel.com
