Grade & Chemical Composition (A554)

Grade
Composition
 
Carbon
max
Manga-nese
max
Phos-phorus
Max
Sulphur
Max
Silicon
Max
Nickel
Chro-mium
Molyb-denum
Titanium
Columbium
+Tantalum
MT-301
0.15
2.00
0.045
0.030
1.00
6.0-8.0
16.0-18.0
---
---
---
MT-302
0.15
2.00
0.045
0.030
1.00
8.0-10.0
17.0-19.0
---
---
---
MT-304
0.08
2.00
0.045
0.030
1.00
8.0-11.0
18.0-20.0
---
---
---
MT-304L
0.035
2.00
0.045
0.030
1.00
8.0-13.0
18.0-20.0
---
---
---
MT-305
0.12
2.00
0.045
0.030
1.00
10.0-13.0
17.0-19.0
---
---
---
MT-309S
0.08
2.00
0.045
0.030
1.00
12.0-15.0
22.0-24.0
---
---
---
MT-309S-Cb
0.08
2.00
0.045
0.030
1.00
12.0-15.0
24.0-26.0
---
---
b
MT-310S
0.08
2.00
0.045
0.030
1.00
19.0-22.0
16.0-18.0
---
---
---
MT-316
0.08
2.00
0.045
0.030
1.00
10.0-14.0
16.0-18.0
2.0-3.0
---
---
MT-316L
0.035
2.00
0.045
0.030
1.00
10.0-15.0
18.0-20.0
2.0-3.0
---
---
MT-317
0.08
2.00
0.045
0.030
1.00
11.0-14.0
17.0-20.0
3.0-4.0
---
---
MT-321
0.08
2.00
0.045
0.030
1.00
9.0-13.0
14.0-16.0
---
a
---
MT-330
0.15
2.00
0.040
0.030
1.00
33.0-36.0
17.0-20.0
---
---
---
MT-347
0.08
2.00
0.045
0.030
1.00
9.0-13.0
14.0-16.0
---
---
b
MT-429
0.12
1.00
0.040
0.030
1.00
0.50 max
16.0-18.0
---
---
---
MT-430
0.12
1.00
0.040
0.030
1.00
0.50 max
16.0-19.5
---
---
---
MT-430Ti
0.10
1.00
0.040
0.030
1.00
0.075 max
 
---
5 x C min
0.75 max
---

a : The Columbium plus tantalum content shall be not less than ten times the carbon content and not more than 1.00%.
b : The titanium content shall be not less than five times the carbon content and not more than 0.60%

We Manufacture following grades :
301 Square Hollow Section, 302 Square Hollow Section, 304 Square Hollow Section, 304L Square Hollow Section, 305Square Hollow Section, 309S Square Hollow Section, 309S-Cb Square Hollow Section, 310S Square Hollow Section, 316 Square Hollow Section, 316L Square Hollow Section, 317 Square Hollow Section, 321 Square Hollow Section, 330 Square Hollow Section, 347 Square Hollow Section, 429 Square Hollow Section, 430 Square Hollow Section, 430-Ti Square Hollow Section.

301 Rectangular Hollow Section, 302 Rectangular Hollow Section, 304 Rectangular Hollow Section, 304L Rectangular Hollow Section, 305 Rectangular Hollow Section, 309S Rectangular Hollow Section, 309S-Cb Rectangular Hollow Section, 310S Rectangular Hollow Section, 316 Rectangular Hollow Section, 316L Rectangular Hollow Section, 317 Rectangular Hollow Section, 321 Rectangular Hollow Section, 330 Rectangular Hollow Section, 347 Rectangular Hollow Section, 429 Rectangular Hollow Section, 430 Rectangular Hollow Section, 430-Ti Rectangular Hollow Section.

301 Flat Tubes, 302 Flat Tubes, 304 Flat Tubes, 304L Flat Tubes, 305 Flat Tubes, 309S Flat Tubes, 309S-Cb Flat Tubes, 310S Flat Tubes, 316 Flat Tubes, 316L Flat Tubes, 317 Flat Tubes, 321 Flat Tubes, 330 Flat Tubes, 347 Flat Tubes, 429 Flat Tubes, 430 Flat Tubes, 430-Ti Flat Tubes.