SUS316(L) – 00Cr17Ni14Mo2
With the addition of Mo (2-3%), it achieves excellent corrosion and corrosion resistance and excellent creep resistance at high temperatures.
Features and practical applications:
| Difference | SUS316(L) |
| Characteristics | Excellent resistance to intergranular corrosion |
| Use | Boiler tubes, marine structures |
Chemical composition: (Unit:% by weight)
| Specification | W | Yes | Mn | P | s | Cr | No | Others |
| SUS316 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 16.0~18.0 | 10.0~14.0 | Mon: 2~3 |
| SUS316L | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 16.0~18.0 | 12.0~15.0 | Mon: 2~3 |
Mechanical properties:
| Specification | YS（Mpa） | TS（Mpa） | EL（%） | Hv |
| TYPE SUS316 |
≥205 | ≥520 | ≥40 | ≤200 |
| TYPE SUS316L |
≥175 | ≥480 | ≥40 | ≤200 |
SUS304 – 0Cr18Ni9
As a fundamental type of the austenite series, it has excellent corrosion resistance, heat resistance, low temperature resistance and mechanical properties. It does not harden after heat treatment and exhibits almost no magnetism.
Practical uses and characteristics:
| Difference | SUS304 | SUS304L |
| Characteristics | Austenitic steel is the most commonly used steel variety;
It has excellent resistance to corrosion and heat; Its resistance to low temperatures and mechanical properties are superior; As it is a single-phase austenitic structure, it does not harden with heat treatment. |
Compared to 304, it has superior corrosion resistance. |
| Use | 1. Tableware, outdoor materials, building materials, auto parts
2. Medical devices, chemicals, food processing, fiber industry 3. Marine components. |
For chemical, coal and petroleum industries that require high resistance to intergranular corrosion in their equipment, |
Chemical composition: (Unit:% by weight)
| Specification | W | Yes | Mn | P | s | Cr | No | Others |
| SUS316 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 16.0~18.0 | 10.0~14.0 | Mon: 2~3 |
| SUS316L | ≤0.03 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 16.0~18.0 | 12.0~15.0 | Mon: 2~3 |
Mechanical properties:
| Specification | YS（Mpa） | TS（Mpa） | EL（%） | Hv |
| TYPE SUS316 |
≥205 | ≥520 | ≥40 | ≤200 |
| TYPE SUS316L |
≥175 | ≥480 | ≥40 | ≤200 |
SUS317L – 00Cr19Ni13Mo3
| Steel type | SUS317L-00Cr19Ni13Mo3 |
| Characteristics | Type 317L steel demonstrates superior resistance to seawater and stress corrosion cracking (SCC) compared to type 316L. |
| Forms | It is used in chemical vessels, chemical reactors and other equipment that requires high corrosion resistance. |
Chemical composition: (Unit:% by weight)
| Specification | W | Yes | Mn | P | s | No | Cr | Mo | OTHERS |
| TYPE 317L |
≤0.030 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 11.0-15.0 | 6pm-8pm | 3.0-4.0 | – |
Mechanical properties:
| Specification | YS（Mpa） | TS（Mpa） | EL（%） | Hv |
| TYPE 317L |
≥176 | ≥480 | ≥40 | ≤200 |
SUS 430
1. Overview
This widely used ferritic stainless steel contains 17% Cr and presents a mixed phase (α+γ) at high temperatures. Below 1000°C, it has a single-phase CCC structure.
2. Features:
1) It has excellent deep drawability, similar to that of 304 steel.
2) It has strong resistance to corrosion by oxidative acids and has a certain level of resistance to alkalis, most organic acids and inorganic acids. Its resistance to stress corrosion cracking is superior to that of 304 steel.
3) It has a lower coefficient of thermal expansion than 304 steel and high resistance to oxidation, making it suitable for heat-resistant equipment.
4) Cold rolled products have good surface gloss and aesthetic appeal.
5) It is more affordable than 304 steel, which is often used as a substitute.
3. Applications
It is mainly used for high-polish decorative purposes in mild atmospheres, such as gas stove surfaces, household appliance components, tableware, building interior decoration, wash basins, washing machine drums, etc.
4. Chemical Composition (JIS G 4305-2005)
| Chemical composition | W | Yes | Mn | P | s | Cr |
| Standard | £0.12 | £0.75 | £1.00 | £0.040 | £0.030 | 4pm-6pm |
| In general | 0.040 | 0:30 | 0.45 | 0.020 | 0.004 | 4:30 p.m. |
5. Performance (JIS G 4305-2005)
| Differentiation | Mechanical properties | Machinability | |||||
| Yes (Mpa) |
Ts (Mpa) |
El (%) |
Hv | CCV | LDR | Er (mm) |
|
| Standard | ≥ 205 | ≥ 450 | ≥ 22 | ≤ 200 | – | – | – |
| In general | 330 | 505 | 27 | 155 | 28.0 | 1.98 | 8.7 |
6. Physical Properties
| Density (g/ cm3 ) |
Magnetism | Resistance (10 -6 .W.cm) |
Specific Heat250C (J/kg.0C) |
Thermal conductivity 1000°C (L/m. 0C) |
Thermal expansion coefficient 20~1000C (10 -6 /0C) |
Young's Modulus 200°C (GPa) |
| 7.70 | To have | 53.6 | 460 | 26.0 | 10.4 | 219 |
7. Heat treatment
Melting point: 1425-15100C;
Annealing: 780-8500C.
8. Condition of Use
1) Annealed state:
NO.1, 2D, 2B, N0.4, HL, BA, Mirror and various other surface treatment states.
9. Precautions for use
- Compared to 304, it has lower extensibility and weldability;
- As it is ferritic stainless steel, it has lower resistance and its work hardening capacity is also low, which must be considered when choosing its use;
- After stretch forming, surface groove defects may appear in the rolling direction, posing significant challenges to polishing operations.
