AISI304 Stainless Steel Silver Mirror Ball/Glass Lawn Ornament
Q: Do you have a half stainless steel sphere of 400mm?
A: As for those standard sizes, we always have stock.
Q: Do you have a 1000mm half stainless steel sphere ? How long can I get it?
A: This ball falls into a category of big size sphere, so it takes some time in manufacturing and delivery.But rest assured you could get it as soon as possible.
Q: Can I have a stainless sphere not of regular sizes?
A: Sizes not of standard are available bur it costs a fortune. Hence, it is not recommended by us. With modest money, we could always provide you with sizes sim lar without too many differences and the quality remains unchanged.
Composition ranges for 304 grade stainless steel
Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
304 | min. max. | - 0.08 | - 2.0 | - 0.75 | - 0.045 | - 0.030 | 18.0 20.0 | - | 8.0 10.5 | - 0.10 |
Mechanical properties of 304 grade stainless steel
Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
Rockwell B (HR B) max | Brinell (HB) max | ||||
304 | 515 | 205 | 40 | 92 | 201 |
Physical properties of 304 grade stainless steel in the annealed condition
Grade |
| Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat 0-100°C (J/kg.K) | Electrical Resistivity (nΩ.m) | |||
0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
304/L/H | 8000 | 193 | 17.2 | 17.8 | 18.4 | 16.2 | 21.5 | 500 | 720 |
Grade specifications for 304 grade stainless steel
Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
BS | En | No | Name | ||||
304 | S30400 | 304S31 | 58E | 1.4301 | X5CrNi18-10 | 2332 | SUS 304 |
TABLE1- TYPICAL ROOM TEMPERATURE MECHANICAL PROPERTIES | ||||||||
UTS kSI.(MPa) | 0.2%YS ksi.(MPa) | Elongation% in 2"(50.8mm) | Rockwell Hardness | |||||
Type 304 | 95(566) | 42(290) | 55 | B84 | ||||
Type 304L | 95(566) | 42(275) | 55 | B82 |
TABLE1- TYPICAL ROOM TEMPERATURE MECHANICAL PROPERTIES | ||||||||
UTS kSI.(MPa) | 0.2%YS ksi.(MPa) | Elongation% in 2"(50.8mm) | Rockwell Hardness | |||||
Type 304 | 95(566) | 42(290) | 55 | B84 | ||||
Type 304L | 95(566) | 42(275) | 55 | B82 |
TABLE3-LOW TEMPERATURE MECHANICAL PROPERTIES | ||||||||
Condition | Temperature ℉(℃) | UTS kSI.(MPa) | 0.2%YS ksi.(MPa) | Elongation% in 2"(50.8mm) | ||||
Annealed | _320(_196)) | 235(1620) | 56(386) | 40 | ||||
_80(_62) | 161(1110) | 50(345) | 57 | |||||
_40(_40) | 145(1000) | 48(331) | 60 | |||||
32(0) | 122(841) | 40(296) | 65 | |||||
70(21) | 85(586) | 35(241) | 55 |
Dual Certification
It is common for 304 and 304L to be stocked in "Dual Certified" form, particularly in plate and pipe. These items have chemical and mechanical properties complying with both 304 and 304L specifications. Such dual certified product does not meet 304H specifications and may be unacceptable for high temperature applications.
Applications
Typical applications include:
Food processing equipment, particularly in beer brewing, milk processing & wine making.
Kitchen benches, sinks, troughs, equipment and appliances
Architectural panelling, railings & trim
Chemical containers, including for transport
Heat Exchangers
Woven or welded screens for mining, quarrying & water filtration
Threaded fasteners
Springs
Types 304 and 304L exhibit excellent resistance to corrosiveenvironments such as the chemical, textile and petroleum industries.Type 304 and 304L are found suitable in the food and dairy industries as well as excelling in rural and industrial atmospheric exposure.By reducing the carbon content in Type 304L, welding operations willnot cause carbide precipitation that can lead to intergranular corrosion. Themaximum temperature to which Type 304 can be exposed continuously without appreciable scaling is about 1650 °F (899 °C).For intermittent cyclic exposure, the maximum exposure temperature
is about 1500 °F (816 °C).Type 304 is non-hardenable by heat treatment.Annealing: Heat to 1900 – 2050 °F (1038 – 1121 °C), then cool rapidly.Thin strip sections may be air cooled, but heavy sections should be waterquenched to minimize exposure in the carbide precipitation region.Stress Relief Annealing: Cold worked parts should be stress relieved at750 °F (399 °C) for 1/2 to 2 hours.High hardness and strength are achieved through cold working. In the annealed condition, Types 304 and 304L are very ductile and can be cold worked easily by roll forming, deep drawing, bending, and other common fabricating methods. Since the material work hardens rapidly, in-process annealing may be necessary to restore ductility and to lower hardness.Types 304 and 304L can be readily formed and drawn. The higher nickel versions of Type 304 are well suited to severe forming applications involving multi-draw operations and forming of complex shapes. This is largely due to its combination of lower strength and lower work hardening rate. As with all austenitic stainless steels,annealing or stress-relieving can be performed following fabrication.The austenitic class of stainless steels is generally considered to be weldable by the common fusion and resistance techniques. Special consideration is required to avoid weld “hot cracking” by assuring formation of ferrite in the weld deposit. Type 304 and 304L are generally considered to be the most common alloys of this stainless class. When a weld filler is needed, AWS E/ER 308, 308L or 347 are most often specified. Types 304 and 304L Stainless Steels are well known in reference literature and more information can be obtained in the following ways:
1. ANSI/AWS A5.9, A5.22 and A5.4 (Stainless Steel Welding Electrode
Specifications).
2. “Welding of Stainless Steels and Other Joining Methods,” SSINA,
(www.ssina.com).
3. ANSI/AWS B2.1.009:2002 (GTAW 300’s @ 0.50 – 0.14 in.).
4. ANSI/AWS B2.1-8-024:2001 (GTAW 300’s @ 0.125 – 1.5 in.).
5. ANSI/AWS B2.1-8-013:2002 (SMAW 300’s @ 0.050 – 0.14 in.).
6. ANSI/AWS B2.1-8-023:94 (SMAW 300’s @ 0.125 – 1.5 in.).
7. ANSI/AWS B2.1.005:2002 (GMAW 300’s @ 0.050 – 0.14 in.).
8. "High Frequency Welding of Stainless Steel Tubes" by H.N. Udall and
R.K. Nichols.
9. ANSI/AWS D1.6/D1.6M:2007 (Structural Welding Code – Stainless
Steel).
Certificate
Production Procedures