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Stainless Steel specifications held in the austenitic, martensitic and precipitation hardening varieties. Stocks are held in British Standard and International standards. Below is listed our most commonly supplied grades; please contact our sales office. Also stock is 301 stainless spring temper rolled strip.
Hi-Steel HSLA-80
Hi - Speed, high Speed Steel Tool Steel (made) : highly processed into the Tool Steel, carbon content high, while containing cr quantity is low (about 4%), reason burnish of Steel surface gloss darker, after heat can reach by HRc62 high hardness, resistance to rust performance not on a roll.
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Heat resistant steel. AS Orlov Izobret. Mashinostr. 3, 48-49, 7/2000. The purpose of this work was to increase plasticity of heat resistant steel after aging at the 500-1300 deg C temperature and to improve its operational reliability.
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Comprehensive stocks held of tool steel, including hot work, cold work and plastic mould tool steel specifications. Below we detail our most common grades. Other British Standard and international special steels and tool steels are also available, please contact our sales office.
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Carbon spring steel is held in a wide range of sizes. Detailed below are our most common specifications. Carbon steel strip and spring steel sheet is available most commonly in the hardened and tempered condition, though certain sizes are available in the annealed condition. Round and flat bar is stocked in the as rolled condition. Most spring steel specifications are held to British Standard steel specifications including BS1449 & BS970.
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Alloy steel is steel alloyed with a variety of elements in total amounts of between 1.0% and 50% by weight to improve its mechanical properties. Alloy steels are broken down into two groups: low alloy steels and high alloy steels. The difference between the two is somewhat arbitrary: Smith and Hashemi define the difference at 4.0%, while Degarmo, et al., define it at 8.0 %.[1][2] Most commonly, the phrase "alloy steel" refers to "low alloy" steels.
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Home » Stainless Steel » Product introduction
304 Stainless Steel
- Numbers: 2011030519
- Model: 304 Stainless Steel
- Producers: China
- Update time: 2011.03.05
- Browse:
Product Description:
Grades of Stainless steel - Grade 304
SX 304 / 304L Technical Data
Summary
Grades of Stainless steel - Grade 304
SX 304 / 304L Technical Data
Summary
SX 304 is the most versatile and the most widely used of all stainless steels. Its chemical composition, mechanical properties, weldability and corrosion/oxidation resistance provide the best all-round performance Stainless steel at relatively low cost. It also has excellent low temperature properties and responds well to hardening by cold working. If intergranular corrosion in the heat affected zone may occur, it is suggested that SX 304L be used.
Typical Applications
SX 304 is used in all industrial, commercial and domestic fields because of its good corrosion and heat resisting properties. Some applications include:
Tanks and containers for a large variety of liquids and solids.
Process equipment in the mining, chemical, cryogenic, food, dairy and pharmaceutical industries.
Chemical Composition (ASTM A240)
| SX | oC | Mn | P | S | Si | Cr | Ni |
| 304 304L |
0.08 max 0.03 max |
2.0 max |
0.045 max |
0.030 max |
1.0 max |
18.0 to 20.0 |
8.0 to 10.50 8.0 - 12.0 |
Typical Properties in the Annealed Condition
The properties quoted in this publication are typical of mill Production and unless indicated should not be regarded as guaranteed minimum values for specification purposes.
1. Mechanical Properties at Room Temperature
| 304 | 304L | |||
| Typical | Minimum | Typical | Minimum | |
| Tensile Strength, MPa | 600 | 515 | 590 | 485 |
| Proof Strength, (Offset 0.2 %), MPa | 310 | 205 | 310 | 170 |
| Elongation (Percent in 50mm) | 60 | 40 | 60 | 40 |
| Hardness (Brinell) | 170 | - | 170 | - |
| Endurance (fatigue) limit, MPa | 240 | - | 240 | - |
2. Properties at elevated temperatures
All these values refer to 304 only.
304L values are not given because its strength decreases markedly above 425oC.
Time Elevated Temperature Tensile Strength
| Temperature, oC | 600 | 700 | 800 | 900 | 1000 |
| Tensile Strength, MPa | 380 | 270 | 170 | 90 | 50 |
Creep data Stress for a creep rate of 1% in 10 000 h.
| Temperature, oC | 550 | 600 | 650 | 700 | 800 |
| Stress, MPa | 120 | 80 | 50 | 30 | 10 |
Maximum Recommended service Temperature
(Oxidising Conditions)
Continuous Service 925oC
Intermittent Service 850oC
3. Properties at Sub-Zero Temperatures
( SX 304 / 304L )
| Temperature | oC | -78 | -161 | -196 |
| Tensile Strength | MPa | 1100/950 | 1450/1200 | 1600/1350 |
| Proof Stress (Offset 0.2%) | MPa | 300/180 | 380/220 | 400/220 |
| Impact Strength (Charpy V-Notch) | J | 180/175 | 160/160 | 155/150 |
4. Corrosion Resistance
Aqueous
As a rough guide the following examples are given for certain pure acid-water mixtures-
| Temperature oC | 20 | 80 |
| Concentration, % by mass | 10 20 40 60 80 100 | 10 20 40 60 80 100 |
| Sulphuric Acid | 2 2 2 2 1 0 | 2 2 2 2 2 2 |
| Nitric Acid | 0 0 0 0 2 0 | 0 0 0 0 1 2 |
| Phosphoric Acid | 0 0 0 0 0 2 | 0 0 0 0 1 2 |
| Formic Acid | 0 0 0 0 0 0 | 0 1 2 2 1 0 |
Key: 0 = resistant - corrosion rate less than 100 mm/year
1 = partly resistant - corrosion rate 100m to 1000 mm/year
2 = non resistant - corrosion rate more than 1000 mm/year
4.2 Atmospheric
The performance of SX 304 compared with other metals in various environments is shown in the following table. The corrosion rates are based on a 10 year exposure.
| Environment | Corrosion Rate (mm/year) | ||
| SX 304 | Aluminium-3S | Mild Steel | |
| Rural | 0.0025 | 0.025 | 5.8 |
| Marine | 0.0076 | 0.432 | 34.0 |
| Marine Industrial | 0.0076 | 0.686 | 46.2 |
Thermal Processing
1. Annealing. Heat from 1010oC to 1120oC and cool rapidly in air or water. The best corrosion resistance is obtained when the final annealing is above 1070oC and cooling is rapid.
2. Stress relieving. SX 304L can be stress relieved at 450-600oC for one hour with little danger of sensitisation. A lower stress relieving temperature of 400oC maximum must be used.
3. Hot working
Initial forging and pressing: 1150 to 1260oC
Finishing temperature: 900 to 925oC
All hotworking operations should be followed by annealing.
Note: Soaking times to ensure uniformity of temperature are longer for Stainless steels than for carbon steels - approximately 12 times.
Cold Working
SX 304 / 304L being extremely tough and ductile, are readily fabricated by old working. Typical operations include bending, forming, deep drawing and upsetting
Steel classification：
Stainless steel，Hi-Steel HSLA-80，Steel mould,Heat resistant steel,Tool steel,Ball bearing steel,Spring steel,Alloy steel,Construction steel，Die steel，Mould steel.
Product description：
Step Shaft 304 Tube 304 Pie-shaped 304 Ring 304 Module 304 Large valves of the main 304 Other Profiled forgings 304
Products Introduction :
Specialized and high quality steel.
We have the advantages of equipment, technologies and price.
Specifications:
Round bar ：
Diameter : 1mm-2000mm
Square bar:
Size： 50mm * 50mm-600mm *600mm
Plate steel/flat bar:
Size：Thickness:0.1mm-800mm Width:10mm to 1500mm
Tube/pipe:
Size：OD:6-219mm WT：1-35 mm.
Cold-rolled sheet:Thickness:2-5mm Width:1000mm Length:2000mm
Hot-rolled sheet:Thickness:6-80mm Width:210-610mm
Length: We can supply any length based on the customer's requirement.
Forging/hot rolling/ extrusion of steel.
Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes
Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement
Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement
Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.
Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirement
Excellent service for all kinds of industries,with advantages of technologies, equipment and price.
We serve you with our honesty, integrity, and professionality.
