Our Forms

Stainless Steel Sheets and Plates


Riddhi Metal Corporation metals offer 300 Series stainless steels sheets and plates(309,310,321,317L) which are austenitic, and are hardenable just by cold working techniques in the form of 2B/2D Finish , Polished Sheet, Perforated Sheet, Flat & Expanded Plate Mill Plate, Diamond Plate . These evaluations of stainless have chromium (approx. 18 to 30%) and nickel (approx. 6 to 20%) as their major alloying increases. 300 Series Stainless steel alloys resist corrosion, keep up their quality at high temperatures and are anything but difficult to keep up.

It has various advantages such as:
  • Heat exchangers
  • Shipbuilding
  • Pulp and paper
  • Marine construction
  • Pipe systems in chemical tankers
  • Blast walls on the offshore platforms
  • better corrosion resistant properties
  • developed for applications requiring extensive machining operations
  • non-magnetic properties
  • scratch resistant
  • many Finishing options: polishing, beveling, etc

We also have 400 series group of stainless steels sheets and plates (410,420)which has 11 percent chromium and 1-percent manganese increment, over the 300 arrangement aggregatein forms of Plate Mill Plate, Coil Plate,2B/2D Finish, Polished Sheet, Perforated Sheet, Flat & Expanded. The 400 arrangement is helpless to rust and corrosion under a few conditions. Heat treating will solidify the 400 series. The 400 arrangement of stainless steels have higher carbon content, giving it a martensitic crystalline structure. This gives high quality and high wear resistance. Martensitic stainless steels aren't as erosion safe as the austenitic sorts.Ferritic or nonhardenable stainless steels, Martensitic or hardenable stainless steelsare classified in the 400 series.

309 Stainless Steel Sheets and Plates (309S,309H,309L)

Elements 309 S 309 H 309 L
Chromium 22.0 min.-24.0 max. 22.0 min.-24.0 max. 2.0 min.-15.0 max.
Nickel 12.0 min.-15.0 max 12.0 min.-15.0 max 12.0 min.-15.0 max
Carbon 0.25 0.08 0.40 min. - 0.10 max.
Manganese 2.00 2.00 2.00
Phosphorus 0.045 0.045 0.045
Sulphur 0.030 0.030 0.030
Silicon 0.75 0.75 0.75
Iron balance balance balance
Density 0.285 lbs/in3
37.89 g/cm3
Specific Heat 0.12 BTU/lb-°F (32 – 212°F)
502 J/kg-°K (0 – 100°C)
Modulus of Elasticity 28.5 x 106 psi
193 GPa
Thermal Conductivity 212°F (100°C) 9.0 BTU/hr/ft2/ft/°F
15.6 W/m-°K
Melting Range 2500 – 2590°F
1480 – 1530°C
Electrical Resistivity 30.7 Microhm-in at 68°C
78 Microhm-cm at 20°C
Yield Strength (0.2% Offset) Ultimate Tensile Strength Elongation in 2 in. Hardness
psi (min.) (MPa) psi (min.) (MPa) % (min.) %(max.)
45,000 310 85,000 586 50 202 (HBN)

310 Stainless Steel Sheets and Plates (310S,310H,310L)

Elements 310 S 310 H 310 L
Chromium 24.0 min.-26.0 max. 24.0 min.-26.0 max. 24.0 min.-26.0 max.
Nickel 19.0 min.-22.0 19.0 min.-22.0 19.0 min.-22.0
Carbon 0.25 0.08 0.40 min. - 0.10 max.
Manganese 2.00 2.00 2.00
Phosphorus 0.045 0.045 0.045
Sulphur 0.030 0.030 0.030
Silicon 0.75 0.75 0.75
Iron balance balance balance
Density 0.285 lbs/in
7.89 g/cm3
Specific Heat 0.12 BTU/lb-°F (32 – 212°F)
502 J/kg-°K (0 – 100°C)
Modulus of Elasticity 28.5 x 106 psi
196 GPa
Thermal Conductivity 212°F (100°C) 8.0 BTU/hr/ft2/ft/°F
10.8 W/m-°K
Melting Range 2470 – 2555°F
1354 – 1402°C
Electrical Resistivity 30.7 Microhm-in at 68°C
78.0 Microhm-cm at 20°C
Yield Strength (0.2% Offset) Ultimate Tensile Strength Elongation in 2 in. Hardness
psi (min.) (MPa) psi (min.) (MPa) % (min.) %(max.)
35,000 245 80,000 550 45 217 Brinell

321 Stainless Steel Sheets and Plates (321H,321L)

Elements 321 321 H
Chromium 17.00 min -19.00 max. 17.00 min -19.00 max.
Nickel 9.00 min.-12.00 max. 9.00 min.-12.00 max.
Carbon 0.04 min.-0.14 max. 0.04 min.-0.14 max.
Manganese 2.00 2.00
Phosphorus 0.045 0.045
Sulphur 0.030 0.030
Silicon 0.75 0.75
Titanium 5 x (C + N) min.-0.70 max. 4 x (C + N) min.-0.70 max.
Iron balance balance
Density 0.285 lbs/in3
7.89 g/cm3
Specific Heat 0.12 BTU/lb-°F (32 – 212°F)
444 J/kg-°K (0 – 100°C)
Modulus of Elasticity 28 x 106 psi
193 GPa
Thermal Conductivity 212°F (100°C) 9.3 BTU/hr/ft2/ft/°F
16.0 W/m-°K
Melting Range 2550 – 2635°F
1398 – 1446°C
Electrical Resistivity 72 Microhm-cm at 20°F
.) 45,000 310 85,000 586 50 202 (HBN)
Yield Strength (0.2% Offset) Ultimate Tensile Strength Elongation in 2 in. Hardness
psi (min.) (MPa) psi (min.) (MPa) % (min.) %(max.)
30,000 05 75,000 515 40 217 Brinel

317 L Stainless Steel Sheets and Plates

Elements 317 L
Chromium 18.0 min.-20.0 max.
Nickel 11.0 min.-15.0 max
Carbon 0.030
Manganese 2.00
Phosphorus 0.045
Sulphur 0.030
Silicon 0.75
Nitrogen 0.10
Molybdenum 3.0min-4.0max
Iron balance
Density 0.285 lbs/in3
7.89 g/cm3
Specific Heat 0.12 BTU/lb-°F (32 – 212°F)
502 J/kg-°K (0 – 100°C)
Modulus of Elasticity 29 x 106 psi
200 GPa
Thermal Conductivity 212°F (100°C) 8.7 BTU/hr/ft2/ft/°F
1.26 W/m-°K
Melting Range 2540 – 2630°F
1390 – 1440°C
Electrical Resistivity 33.5 Microhm-in at 68°C
85.1 Microhm-cm at 20°C
Yield Strength (0.2% Offset) Ultimate Tensile Strength Elongation in 2 in. Hardness
psi (min.) (MPa) psi (min.) (MPa) % (min.) %(max.)
30,000 205 75,000 515 40 95 Rockwell B

410 Stainless Steel Sheets and Plates

Elements 410
Chromium 11.5 min -135 max
Nickel 0.75
Carbon 0.08 min-0.15 max
Manganese 1.0
Phosphorus 0.04
Sulphur 0.03
Silicon 1.0
Iron balance
Density 0.28 lbs/in3
7.74 g/cm3
Specific Heat 0.11 BTU/lb-°F (32 – 212°F)
0.46 J/kg-°K (0 – 100°C)
Modulus of Elasticity 29.0 x 106 psi
200 GPa
Thermal Conductivity 212°F (100°C) 14.4 BTU/hr/ft2/ft/°F
24.9 W/m-°K
Melting Range 2700 – 2790°F
1480 – 1530°C
Electrical Resistivity 22.50 Microhm-cm at 68°C
57 Microhm-cm at 20°C
Yield Strength (0.2% Offset) Ultimate Tensile Strength Elongation in 2 in. Hardness
psi (min.) (MPa) psi (min.) (MPa) % (min.) %(max.)
30,000 205 65,000 450 20 96 Rb

420 Stainless Steel Sheets and Plates

Elements 420
Chromium 11.5 min.-14.5 max.
Nickel 0.60
Carbon 0.08
Manganese 1.0
Phosphorus 0.04
Sulphur 0.03
Silicon 1.0
Iron balance
Density 0.28 lbs/in3
7.73 g/cm3
Specific Heat 0.11 BTU/lb-°F (32 – 212°F)
0.46 J/kg-°K (0 – 100°C)
Modulus of Elasticity 29 x 106 psi
200 GPa
Thermal Conductivity 212°F (100°C) 187 BTU/hr/ft2/ft/°F
26.9 W/m-°K
Melting Range 2700 – 2790°F
1480 – 1530°C
Electrical Resistivity 23.7 Microhm-in at 68°C
60 Microhm-cm at 20°C
Yield Strength (0.2% Offset) Ultimate Tensile Strength Elongation in 2 in. Hardness Reduction % of area
psi (min.) (MPa) psi (min.) (MPa) % (min.) %(max.)
42,000 290 64,400 444 33 75 Rockwell B 65

Our Exports:

Riddhi Metal Corporation exports Duplex and Super Duplex Fittings in Gulf Countries of Kuwait, Bahrain, Iraq, Oman, Qatar, Saudi Arabia and the United Arab Emirates (UAE) and also in Eupropean countries of Netherland,Italy, Norway, Slovenia, Spain, Sweden, Switzerland.Also in counties such as United States Of America, United Kingdom, Australia, South Africa, Mexico, Turkey, France, New Zealand, Angola, Congo, Kenya, Lebanon, etc