K M D Steel And Tube is primary manufacturers, suppliers, stockists& exporter for SS 304/304L/304H Buttweld Fittings. Stainless Steel 304L is the low carbon version of 304. It doesn't require post-weld toughening as is generally used as a piece of significant gage fragments (over around 6mm). Hardened Steel Grade 304H with its higher carbon content finds application at raised temperatures.The 304/304L is an austenitic Stainless Steel designed for moderate to high corrosion resistance. Its low carbon content improves cleanliness and weld strength. It is used in acid & fertilizer production equipment and pharmaceutical and are used to construct heat exchangers, valves & manifolds. It has stronger corrosion properties and moreover, has great formability and weldability. The Buttweld Fittings are made of Best quality raw material and do match national & international quality standard and this helps us to have high demand in the market from our customer. The Fittings are made in different shapes, size & dimensions and are sold to customers as per their need & requirement. The prices for these Fittings are customer oriented & market friendly.
| Grade | SS 304(UNS S30400), SS 304L (UNS S30403), SS 304H (UNS S30409) ). |
|---|---|
| Dimension Std. | ASME/ANSI B16.9, ASME B16.28, MSS-SP-43 |
| Specification | ASTM A403 / ASME SA403 |
| Size | ½” NB – 48” NB |
| Thickness | SCH 10 – SCH XXS |
| Type | Seamless / ERW / Welded / Fabricated |
| C | Mn | Si | P | S | Cr | Ni | N | |
|---|---|---|---|---|---|---|---|---|
| 304 | 0.07max | 2.0max | 0.75max | 0.045max | 0.03max | min: 18.0 max: 20.0 | min: 8.0 max: 10.5 | — |
| 304L | 0.03max | 2.0max | 0.75max | 0.045max | 0.03max | min: 18.0 max: 20.0 | min: 8.0 max: 12.0 | 0.10 max |
| 304H | min: 18.0 max:20.0 |
min: 8.0 max: 10.5 |
min: 0.04 max:0.10 |
0.75 max |
2.0 max |
0.045 max |
0.03 max |
0.10 max |
| Grade | Tensile Strength ksi (min) | Yield Strength 0.2% ksi (min) | Elongation % | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
|---|---|---|---|---|---|
| 304 | 75 | 30 | 40 | 201 | 92 |
| 304L | 70 | 25 | 40 | 201 | 92 |
| 304H | 75 | 30 | 40 | 201 | 92 |
| SS 304/304L | ||||||
|---|---|---|---|---|---|---|
| Density lbm/in3 |
Thermal Conductivity (BTU/h ft. °F) |
Electrical Resistivity (in x 10-6) |
Modulus of Elasticity (psi x 106 |
Coefficient of Thermal Expansion (in/in)/ °F x 10-6 |
Specific Heat (BTU/lb/ °F) |
Melting Range (°F) |
| at 68°F: 0.285 | 9.4 at 212°F | 28.3 at 68°F | 28 | 9.4 at 32 – 212°F | 0.1200 at 68°F to 212°F | 2500 to 2590 |
| 12.4 at 932 °F | 39.4 at 752°F | 10.2 at 32 – 1000°F | ||||
| 49.6 at 1652 °F | 10.4 at 32 – 1500°F | |||||
| SS 304H | ||||||
| Denstiy lbm/in3 |
Coefficient of Thermal Expansion (min/in)-°F |
Thermal Conductivity BTU/hr-ft-°F | Specific Heat BTU/lbm -°F | Modules of Elasticity (annealed)2-psi | ||
| at 68 °F | at 68 – 212°F | at 68 – 1600°F | at 212°F | at 932°F | at 32 – 212°F | in tension (E) |
| 0.285 | 9.2 | 11.0 | 9.4 | 12.4 | 0.12 | 29 x 106 |