Grade 440C is classified as a martensitic class of stainless steel. This steel grade contains a high content of carbon in its chemistry. This is why the 440C stainless steel round bar is referred to as a high carbon stainless steel alloy. Because of the higher content of carbon in its chemical composition, the martensitic 440Cc stainless steel welding rod exhibits properties such as high strength, and good hardness and wear resistance.
Unlike conventional stainless steels in the austenitic class, the corrosion resistance properties of 440C stainless steel rods are considered to be in the moderate range. However, for the properties, the most vital characteristic of the Stainless Steel 440C Round Bar is its yield and tensile strength. Compared to several austenitic stainless steels, which are ductile, the tensile strength of ASTM A479 UNS S44004 hex bar ranges between 760 MPa - 1970 MPa. And the yield strength at an offset of 0.200% is somewhere between 450 MPa - 1900 MPa. It is very difficult to weld this particular alloy since the JIS SUS 440C black bar is easily air hardened.
And so the material requires a pre-weld and a post-weld heat treatment for a duration of 6 hours to prevent the astm a276 type 440C flat bar from cracking. Because of its superior hardness and good mechanical strength, the applications of the AISI 440C threaded bar are suited to instrumentations as well as molds and dies. In order to improve the properties of the alloy, the ss 440C bright bar is given heat treatment. The practice of heat treatment improves properties such as the strength, hardness, and wear resistance of the DIN 1.4125 square bar.
| Dimensions | DIN, EN, ASTM, JIS, ASME, BS, AISI |
|---|---|
| Round bar size | Diameter: 3-~800mm |
| Flat bar size | Thickness: 2 -100mm |
| Width: 10 to 500mm | |
| Angle bar size | 3mm*20mm*20mm~12mm*100mm*100mm |
| Channel Bar | 80 x 40mm to 150 x 75mm section; 5.0 to 6.0mm thickness |
| Rectangular Bars Section | 3.0 to 12.0mm thickness |
| Billet Size | 1/2 to 495mm Diameter |
| Rectangles Size | 33 x 30mm to 295 x 1066mm |
| Hollow Bar | 32mm OD x 16mm ID to 250mm OD x 200mm ID) |
| Dimensions | Diameter / Height: |
| Tolerance | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements |
| Finish | Cold (bright) drawn, centreless ground, hot rolled, smooth turned, peeled, slit rolled edge, hot rolled annealed, Rough Turned, Bright, Polish, Grinding, Centreless Ground & Black |
| Surface | Hot Rolled Pickled, Bright, Sand Blasting Finished, Cold Drawn, Hairline,Polished |
| Condition | Hardened & tempered, annealed |
| Technique | Stainless Steel Cold Drawn, Hot Rolled, Forged Round Bar,Cold Rolled, Rod |
| Processing | Bar cutting to 650mm |
| Form | Rod, Round, Channel Bar, T-Bar, Flat Bar, Precision Ground Bar, Blocks, Square, Rings, Round Rod, Triangle, Hollow, Rectangle, Threaded, Hex (A/F), Profiles, Half Round Bar, Ingot, Billet, I/H Bar, Forging etc. |
Size |
Chucked true to OD |
Chucked true to ID |
|||||||
|---|---|---|---|---|---|---|---|---|---|
OD, mm |
ID, mm |
Max. OD, mm |
Min. ID, mm |
Max. OD, in. |
Min. ID, in. |
Max. OD, mm |
Min. ID, mm |
Max. OD, in. |
Min. ID, in. |
32 |
20 |
31 |
21.9 |
1.220 |
0.862 |
30 |
21 |
1.185 |
0.827 |
32 |
16 |
31 |
18 |
1.220 |
0.709 |
30 |
17 |
1.181 |
0.669 |
36 |
25 |
35 |
26.9 |
1.378 |
1.059 |
34.1 |
26 |
1.343 |
1.024 |
36 |
20 |
35 |
22 |
1.378 |
0.866 |
34 |
21 |
1.339 |
0.827 |
36 |
16 |
35 |
18.1 |
1.378 |
0.713 |
33.9 |
17 |
1.335 |
0.669 |
40 |
28 |
39 |
29.9 |
1.535 |
1.177 |
38.1 |
29 |
1.500 |
1.142 |
40 |
25 |
39 |
27 |
1.535 |
1.063 |
38 |
26 |
1.496 |
1.024 |
40 |
20 |
39 |
22.1 |
1.535 |
0.870 |
37.9 |
21 |
1.492 |
0.827 |
45 |
32 |
44 |
33.9 |
1.732 |
1.335 |
43.1 |
33 |
1.697 |
1.299 |
45 |
28 |
44 |
30 |
1.732 |
1.181 |
43 |
29 |
1.693 |
1.142 |
45 |
20 |
44 |
22.2 |
1.732 |
0.874 |
42.8 |
21 |
1.685 |
0.827 |
50 |
36 |
49 |
38 |
1.929 |
1.496 |
48 |
37 |
1.890 |
1.457 |
50 |
32 |
49 |
34.1 |
1.929 |
1.343 |
47.9 |
33 |
1.886 |
1.299 |
50 |
25 |
49 |
27.2 |
1.929 |
1.071 |
47.8 |
26 |
1.882 |
1.024 |
56 |
40 |
55 |
42 |
2.165 |
1.654 |
54 |
41 |
2.126 |
1.614 |
56 |
36 |
55 |
38.1 |
2.165 |
1.500 |
53.9 |
37 |
2.122 |
1.457 |
56 |
28 |
55 |
30.3 |
2.165 |
1.193 |
53.7 |
29 |
2.114 |
1.142 |
63 |
50 |
62 |
51.9 |
2.441 |
2.043 |
61.1 |
51 |
2.406 |
2.008 |
63 |
45 |
62 |
47 |
2.441 |
1.850 |
61 |
46 |
2.402 |
1.811 |
63 |
40 |
62 |
42.2 |
2.441 |
1.661 |
60.8 |
41 |
2.394 |
1.614 |
63 |
36 |
62 |
38.3 |
2.441 |
1.508 |
60.7 |
37 |
2.390 |
1.457 |
63 |
32 |
62 |
34.4 |
2.441 |
1.354 |
60.6 |
33 |
2.386 |
1.299 |
71 |
56 |
69.9 |
58 |
2.752 |
2.283 |
68.9 |
57 |
2.713 |
2.244 |
71 |
45 |
69.9 |
47.3 |
2.752 |
1.862 |
68.6 |
46 |
2.701 |
1.811 |
71 |
40 |
69.9 |
42.4 |
2.752 |
1.669 |
68.5 |
41 |
2.697 |
1.614 |
71 |
36 |
69.9 |
38.5 |
2.752 |
1.516 |
68.4 |
37 |
2.693 |
1.457 |
75 |
60 |
73.8 |
62 |
2.906 |
2.441 |
72.8 |
61 |
2.866 |
2.402 |
75 |
50 |
73.8 |
52.2 |
2.906 |
2.055 |
72.6 |
51 |
2.858 |
2.008 |
75 |
40 |
73.8 |
42.5 |
2.906 |
1.673 |
72.3 |
41 |
2.846 |
1.614 |
80 |
63 |
78.8 |
65 |
3.102 |
2.559 |
77.8 |
64 |
3.063 |
2.520 |
80 |
50 |
78.8 |
52.4 |
3.102 |
2.053 |
77.4 |
51 |
3.047 |
2.008 |
80 |
45 |
78.8 |
47.5 |
3.102 |
1.870 |
77.3 |
46 |
3.043 |
1.811 |
80 |
40 |
78.8 |
42.6 |
3.102 |
1.677 |
77.2 |
41 |
3.039 |
1.614 |
85 |
67 |
83.7 |
69.1 |
3.295 |
2.720 |
82.6 |
68 |
3.252 |
2.677 |
85 |
55 |
83.7 |
57.4 |
3.295 |
2.260 |
82.3 |
56.0 |
3.240 |
2.205 |
85 |
45 |
83.7 |
47.6 |
3.295 |
1.874 |
82.1 |
46.0 |
3.232 |
1.811 |
90 |
71 |
88.6 |
73.1 |
3.488 |
2.878 |
87.6 |
72.1 |
3.449 |
2.839 |
90 |
63 |
88.6 |
65.3 |
3.488 |
2.571 |
87.3 |
64.0 |
3.437 |
2.520 |
90 |
56 |
88.6 |
58.5 |
3.488 |
2.303 |
87.1 |
57.0 |
3.429 |
2.244 |
90 |
50 |
88.6 |
52.6 |
3.488 |
2.071 |
87.0 |
51.0 |
3.425 |
2.008 |
95 |
75 |
93.5 |
77.3 |
3.681 |
3.041 |
92.4 |
76.2 |
3.641 |
2.997 |
95 |
67 |
93.5 |
69.3 |
3.681 |
2.728 |
92.2 |
68.0 |
3.630 |
2.677 |
95 |
50 |
93.5 |
52.7 |
3.681 |
2.075 |
91.8 |
51.0 |
3.614 |
2.008 |
100 |
80 |
98.5 |
82.3 |
3.878 |
3.240 |
97.4 |
81.2 |
3.835 |
3.197 |
100 |
71 |
98.5 |
73.4 |
3.878 |
2.890 |
97.2 |
72.1 |
3.827 |
2.839 |
100 |
63 |
98.5 |
65.5 |
3.878 |
2.579 |
97.0 |
64.0 |
3.819 |
2.520 |
100 |
56 |
98.5 |
58.7 |
3.878 |
2.311 |
96.8 |
57.0 |
3.811 |
2.244 |
106 |
80 |
104.4 |
82.5 |
4.110 |
3.248 |
103.1 |
81.2 |
4.059 |
3.197 |
106 |
71 |
104.4 |
73.5 |
4.110 |
2.894 |
103.0 |
72.1 |
4.055 |
2.839 |
106 |
63 |
104.4 |
65.7 |
4.110 |
2.587 |
102.7 |
64.0 |
4.043 |
2.520 |
106 |
56 |
104.4 |
58.9 |
4.110 |
2.319 |
102.5 |
57.0 |
4.035 |
2.244 |
112 |
90 |
110.3 |
92.5 |
4.343 |
3.642 |
109.2 |
91.4 |
4.299 |
3.598 |
112 |
80 |
110.3 |
82.6 |
4.343 |
3.252 |
108.9 |
81.2 |
4.287 |
3.197 |
112 |
71 |
110.3 |
73.7 |
4.343 |
2.902 |
108.7 |
72.1 |
4.280 |
2.839 |
112 |
63 |
110.3 |
65.8 |
4.343 |
2.591 |
108.5 |
64.0 |
4.272 |
2.520 |
118 |
90 |
116.2 |
92.7 |
4.575 |
3.650 |
114.9 |
91.4 |
4.524 |
3.598 |
118 |
80 |
116.2 |
82.8 |
4.575 |
3.260 |
114.6 |
81.2 |
4.512 |
3.197 |
118 |
71 |
116.2 |
73.8 |
4.575 |
2.906 |
114.5 |
72.1 |
4.508 |
2.839 |
118 |
63 |
116.2 |
66.0 |
4.575 |
2.598 |
114.2 |
64.0 |
4.496 |
2.520 |
125 |
100 |
123.1 |
102.7 |
4.846 |
4.043 |
121.9 |
101.5 |
4.799 |
3.996 |
125 |
90 |
123.1 |
92.8 |
4.846 |
3.654 |
121.7 |
91.4 |
4.791 |
3.598 |
125 |
80 |
123.1 |
82.9 |
4.846 |
3.264 |
121.4 |
81.2 |
4.780 |
3.197 |
125 |
71 |
123.1 |
74.0 |
4.846 |
2.913 |
121.3 |
72.1 |
4.772 |
2.839 |
132 |
106 |
130.0 |
108.8 |
5.118 |
4.283 |
128.8 |
107.6 |
5.071 |
4.236 |
132 |
90 |
130.0 |
93.0 |
5.118 |
3.661 |
128.4 |
91.4 |
5.055 |
3.598 |
132 |
80 |
130.0 |
83.1 |
5.118 |
3.272 |
128.1 |
81.2 |
5.043 |
3.197 |
132 |
71 |
130.0 |
74.2 |
5.118 |
2.921 |
121.2 |
72.1 |
5.035 |
2.839 |
140 |
112 |
137.9 |
115 |
5.429 |
4.528 |
136.6 |
113.7 |
5.378 |
4.476 |
140 |
100 |
137.9 |
103.1 |
5.429 |
4.059 |
136.3 |
101.5 |
5.366 |
3.996 |
140 |
90 |
137.9 |
93.2 |
5.429 |
3.669 |
136.1 |
91.4 |
5.358 |
3.598 |
140 |
80 |
137.9 |
83.3 |
5.429 |
3.280 |
135.8 |
81.2 |
5.346 |
3.197 |
150 |
125 |
147.7 |
128.1 |
5.815 |
5.043 |
146.5 |
126.9 |
5.768 |
4.996 |
150 |
106 |
147.7 |
109.3 |
5.815 |
4.303 |
146 |
107.6 |
5.748 |
4.236 |
150 |
95 |
147.7 |
98.4 |
5.815 |
3.874 |
145.7 |
96.4 |
5.736 |
3.795 |
150 |
80 |
147.7 |
83.6 |
5.815 |
3.291 |
145.3 |
81.2 |
5.720 |
3.197 |
160 |
132 |
157.6 |
135.3 |
6.205 |
5.327 |
156.3 |
134 |
6.154 |
5.276 |
160 |
122 |
157.6 |
125.4 |
6.205 |
4.937 |
156 |
123.8 |
6.142 |
4.874 |
160 |
112 |
157.6 |
115.5 |
6.205 |
4.547 |
155.8 |
113.7 |
6.134 |
4.476 |
160 |
90 |
157.6 |
94.0 |
6.205 |
3.701 |
155.2 |
91.4 |
6.110 |
3.598 |
170 |
140 |
167.4 |
143.5 |
6.591 |
5.650 |
166 |
142.1 |
6.535 |
5.594 |
170 |
130 |
167.4 |
133.6 |
6.591 |
5.260 |
165.8 |
132 |
6.528 |
5.197 |
170 |
128 |
167.4 |
131.6 |
6.591 |
5.181 |
165.7 |
130 |
6.524 |
5.118 |
170 |
118 |
167.4 |
121.7 |
6.591 |
4.791 |
165.5 |
119.8 |
6.516 |
4.717 |
170 |
106 |
167.4 |
109.8 |
6.591 |
4.323 |
165.2 |
107.6 |
6.504 |
4.236 |
170 |
100 |
167.4 |
103.9 |
6.591 |
4.091 |
165 |
101.5 |
6.496 |
3.996 |
180 |
150 |
177.3 |
153.6 |
6.980 |
6.047 |
176 |
152.3 |
6.929 |
5.996 |
180 |
140 |
177.3 |
143.7 |
6.980 |
5.657 |
175.7 |
142.1 |
6.917 |
5.594 |
180 |
125 |
177.3 |
128.9 |
6.980 |
5.075 |
175.3 |
126.9 |
6.902 |
4.996 |
180 |
100 |
177.3 |
104.1 |
6.980 |
4.098 |
174.7 |
101.5 |
6.878 |
3.996 |
190 |
160 |
187.1 |
163.8 |
7.366 |
6.449 |
185.7 |
162.4 |
7.311 |
6.394 |
190 |
150 |
187.1 |
153.9 |
7.366 |
6.059 |
185.5 |
152.3 |
7.303 |
5.996 |
190 |
132 |
187.1 |
136 |
7.366 |
5.354 |
185.1 |
134 |
7.287 |
5.276 |
200 |
170 |
197.0 |
173.9 |
7.756 |
6.846 |
195.6 |
172.6 |
7.701 |
6.795 |
200 |
160 |
197.0 |
164 |
7.756 |
6.457 |
195.4 |
162.4 |
7.693 |
6.394 |
200 |
150 |
197.0 |
154.1 |
7.756 |
6.067 |
195.2 |
152.3 |
7.685 |
5.996 |
200 |
140 |
197.0 |
144.2 |
7.756 |
5.677 |
194.9 |
142.1 |
7.673 |
5.594 |
212 |
170 |
208.8 |
174.2 |
8.220 |
6.858 |
207.2 |
172.6 |
8.157 |
6.795 |
212 |
150 |
208.8 |
154.4 |
8.220 |
6.079 |
206.6 |
152.3 |
8.133 |
5.997 |
212 |
130 |
208.8 |
134.6 |
8.220 |
5.299 |
206.2 |
132 |
8.118 |
5.197 |
224 |
180 |
220.6 |
184.4 |
8.685 |
7.260 |
218.9 |
182.7 |
8.618 |
7.193 |
224 |
140 |
220.6 |
144.8 |
8.685 |
5.701 |
217.9 |
142.1 |
8.579 |
5.594 |
236 |
190 |
232.4 |
194.6 |
9.150 |
7.661 |
230.7 |
192.9 |
9.083 |
7.594 |
236 |
150 |
232.4 |
155.0 |
9.150 |
6.102 |
229.7 |
152.3 |
9.043 |
5.996 |
250 |
200 |
246.2 |
204.9 |
9.693 |
8.067 |
244.3 |
203.0 |
9.618 |
7.992 |
275 |
200 |
268.9 |
205.4 |
10.587 |
8.087 |
266.5 |
203.0 |
10.492 |
7.992 |
| Metric | US Bar | ASTM/ Canadian | Japanese | ||||
|---|---|---|---|---|---|---|---|
| Bar Size | Diam. (mm) | Bar Size | Diam. (Inch) | Bar Size | Diam. (mm2) | Bar Size | Diam. (mm) |
| 5 | 5 | #2 | 0.250 | 10M | 100 | 6 | 6 |
| 5.5 | 5.5 | #3 | 0.375 | 15M | 200 | 10 | 10 |
| 6 | 6 | #4 | 0.500 | 20M | 300 | 13 | 13 |
| 7 | 7 | #5 | 0.625 | 25M | 500 | 16 | 16 |
| 8 | 8 | #6 | 0.750 | 30M | 700 | 19 | 19 |
| 9 | 9 | #7 | 0.875 | 35M | 1000 | 22 | 22 |
| 10 | 10 | #8 | 1.000 | 45M | 1500 | 25 | 25 |
| 11 | 11 | #9 | 1.125 | 55M | 2500 | 29 | 29 |
| 12 | 12 | #10 | 1.250 | 32 | 32 | ||
| 14 | 14 | #11 | 1.375 | 35 | 35 | ||
| 16 | 16 | #12 | 1.500 | 38 | 38 | ||
| 18 | 18 | #13 | 1.625 | 41 | 41 | ||
| 20 | 20 | #14 | 1.750 | 44 | 44 | ||
| 22 | 22 | #15 | 1.875 | 48 | 48 | ||
| 25 | 25 | #16 | 2.000 | 51 | 51 | ||
| 28 | 28 | #18 | 2.250 | 57 | 57 | ||
| 32 | 32 | ||||||
| 36 | 36 | ||||||
| 40 | 40 | ||||||
| 44 | 44 | ||||||
| 50 | 50 | ||||||
SS 440C flat bar sizes in mm |
SS 440C Flat Bar Size (inch) |
SS 440C Flat Bar Thickness (mm) |
SS 440C Flat Bar Thickness (in Inches) |
|---|---|---|---|
22 |
7/8 |
17 & 18 |
2/3 - 5/7 |
25 |
1 |
5 to 20 |
3/16 - 4/5 |
30 |
1-3/16 |
5 to 20 |
3/16 - 4/5 |
32 |
1-1/4 |
6 to 20 |
1/4 - 4/5 |
35 |
1-3/8 |
5 to 20 |
3/16 - 3/16 |
40 |
1-4/7 |
5 to 25 |
3/16 - 1 |
45 |
1-7/9 |
5 to 25 |
3/16 - 1 |
47 |
1-6/7 |
17,25 & 32 |
2/3, 1 & 1-1/4 |
50 |
2 |
5 to 32 |
3/16 - 1-1/4 |
55 |
2-1/16 |
5 to 25 |
3/16 - 1 |
57 |
2-1/4 |
32 |
1-1/4 |
60 |
2-3/8 |
5 to 35 |
3/16 - 1-3/8 |
63 |
2-1/2 |
10 to 30 |
3/8 - 1-3/16 |
65 |
2-5/9 |
10 to 30 & 35 |
3/8 - 1-3/16, & 1-3/8 |
70 |
2-3/4 |
6 to 25 & 40 |
1/4 - 1, & 1-4/7 |
75 |
3 |
8 to 25 |
5/16 - 1 |
80 |
3-1/8 |
8 to 20 |
5/16 - 4/5 |
90 |
3-1/2 |
8 to 20 |
5/16- 4/5 |
100 |
4 |
8, 10, 12 |
5/16, 3/8, 1/2 |
Size (mm) |
Weight per metre (Kg) |
Size (mm) |
Weight per metre (Kg) |
|---|---|---|---|
12 x 12 |
1.14 |
30x30 |
7.11 |
16 x 16 |
2.02 |
40 x 40 |
12.60 |
20 x 20 |
3.16 |
50 x 50 |
19.80 |
25 x 25 |
4.94 |
Size (mm) |
Weight (kg/m) |
Size (mm) |
Weight (kg/m) |
Size (mm) |
Weight (kg/m) |
|---|---|---|---|---|---|
7 x 7 |
0.337 |
19 x 19 |
2.479 |
38 x 38 |
9.916 |
8 x 8 |
0.44 |
20 x 20 |
2.747 |
40 x 40 |
10.988 |
9 x 9 |
0.556 |
21 x 21 |
3.029 |
42 x 42 |
12.114 |
10 x 10 |
0.687 |
22 x 22 |
3.324 |
45 x 45 |
13.906 |
11 x 11 |
0.831 |
24 x 24 |
3.956 |
48 x 48 |
15.822 |
12 x 12 |
0.989 |
25 x 25 |
4.292 |
50 x 50 |
17.168 |
13 x 13 |
1.161 |
26 x 26 |
4.642 |
53 x 53 |
19.29 |
14 x 14 |
1.346 |
28 x 28 |
5.384 |
55 x 55 |
20.774 |
15 x 15 |
1.545 |
30 x 30 |
6.181 |
60 x 60 |
24.723 |
16 x 16 |
1.758 |
32 x 32 |
7.032 |
65 x 65 |
29.015 |
17 x 17 |
1.985 |
34 x 34 |
7.939 |
70 x 70 |
33.65 |
18 x 18 |
2.225 |
36 x 36 |
8.9 |
75 x 75 |
38.629 |
Element |
SS 440C |
|---|---|
Temp°C |
20 |
Tensile (UTS)N/mm² |
1965 |
0.2% YieldN/mm² |
1896 |
Elongation(50.8mm) %) |
2 |
HardnessHRc |
57 |
Reductionof Area |
10 |
STANDARD |
WERKSTOFF NR. |
UNS |
JIS |
|---|---|---|---|
| SS 440C |
1.4125 |
S44004 |
SUS 440C |
SS 440C |
Max |
Min |
|---|---|---|
C |
1.20 |
0.95 |
Si |
1.00 |
- |
Mn |
1.00 |
- |
Ni |
1.00 |
- |
Cr |
18.00 |
16.00 |
Mo |
0.75 |
0.00 |
P |
0.04 |
- |
S |
0.03 |
0.15 |
440C Stainless Steel Bright Bar |
SS 440C Flat Bars |
Stainless Steel 440C Hexagonal Bar |
SUS440C T-Bar |
440C Stainless Steel Square Bar |
SUS440C Square Bars |
Stainless Steel 440C Bright Bar |
Stainless Steel 440C Square Bar |
Rolled Stainless Steel 440C Square Bar |
ASTM A276 Type 440C Square Bars |
440C Stainless Steel Rectangular Bar |
SUS440C Rectangular Bars |
SS 440C Rectangular Bar |
ASTM A276 Type 440C Hex Bar |
ASTM A276 Type 440C Bright Bar |
ASTM A276 Type 440C Rectangular Bar |
440C Stainless Steel Flat Bar |
SS 440C Hex Bar |
440C Stainless Steel Shaft |
Rolled Stainless Steel 440C Bright Bar |
SS 440C Square Bar |
ASTM A276 Type 440C Flat Bars |
440C Stainless Steel Polished Bar |
440C Stainless Steel Hex Bar |
SS 440C Polished Bar |
ASTM A276 AISI 440C Bright Bar |
