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Stainless steel grade 430 is a non-hardenable steel containing straight chromium, belonging to the ferritic group of steels. Known for its good corrosion resistance and formability, coupled with practical mechanical properties, it can be used in various chemical applications.
Grade 430F stainless steel is typically provided in bar form for use in automatic screw machines. Grade 434 offers similar properties to grade 430 but includes molybdenum content that enhances corrosion resistance.
Chemical Composition
Chemical compositions of grade 430 stainless steels:
Grade
C
Mn
Si
P
S
Cr
Mo
Ni
N
430
- / 0.12
- / 1
- / 1
- / 0.04
- / 0.030
16 / 18
-
- / 0.50
-
430F
- / 0.12
- / 1.25
- / 1
- / 0.06
0.15 / -
16 / 18
-
-
-
Mechanical Properties
Grade
Tensile Strength (MPa) min
Yield Strength 0.2% Proof (MPa) min
Elongation (% in 50mm) min
Rockwell B (HR B) max
Brinell (HB) max
430
483
310
22
85
183
430F
552 typical
379 typical
25 typical
-
262
Physical Properties
Grade
Density (kg/m³)
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)
430
7750
200
10.4
26.1
460
600
430F
7750
200
10.4
26.1
460
600
Grade Specification Comparison
Grade
UNS No
Old British BS
Euronorm No
Swedish SS
Japanese JIS
430
S43000
430S17
1.4016
2320
SUS 430
430F
S43020
-
1.4104
2383
SUS 430F
Possible Alternative Grades
Grade
Reasons for Choosing Alternative
430F
Higher machinability than 430 is needed in bar product, and reduced corrosion resistance is acceptable
434
Better pitting resistance is required
304
Slightly higher corrosion resistance is needed, together with greatly improved ability to be welded and cold formed
316
Much better corrosion resistance is needed, coupled with greatly improved ability to be welded and cold formed
3CR12
Lower corrosion resistance is acceptable in a cost-critical application
Corrosion Resistance
All ferritic grades, including stainless steel grade 430, offer excellent stress corrosion cracking resistance. Grade 430 provides good corrosion resistance to numerous substances, with maximum corrosion resistance achieved in well-polished or buffed condition. Its pitting and crevice corrosion resistance is comparable to grade 304. Grade 430F, being a high-sulfur free machining grade, offers comparatively lower resistance to pitting and crevice corrosion than non-free machining grades.
Heat Resistance
Stainless steel grade 430 can resist oxidation up to 870°C (1598°F) in intermittent usage and up to 815°C (1499°F) in continuous usage. The material may become brittle at room temperature, particularly after prolonged heating in the 400-600°C (752-1112°F) range, which can be mitigated through annealing.
Heat Treatment
Solution annealing involves heating grade 430 to 815-845°C (1499-1553°F), followed by slow furnace cooling to 600°C (1112°F) and rapid air-cooling. Slow cooling between 540-400°C (1004-752°F) may cause embrittlement. For sub-critical annealing, heating to 760-815°C (1400-1499°F) followed by air-cooling or water quenching is recommended. This stainless steel cannot be hardened by thermal treatment.
Welding
Welding grade 430 requires pre-heating at 150-200°C (302-392°F). If embrittlement occurs in welded metal, post-weld annealing at 790-815°C (1454-1499°F) can be performed, though grain refinement will not occur. Recommended filler rods include grade 430, 308L, 309, or 310 based on application requirements.
Machining
Grade 430 offers better machinability than standard austenitic steels like grade 304, though galling may occur. Lightly drawn bars are easier to machine than annealed bars. Grade 430F provides excellent machinability.
Fabrication
Grade 430's low work hardening rate facilitates easy bending and forming. However, its low ductility rate limits rigorous operations. Grade 430 wire can handle rigorous cold heading, with sub-critical intermediate annealing potentially required for extreme cold working.
Applications
Dish washer linings
Refrigerator cabinet panels
Element supports and fasteners
Stove trim rings and chimney liners
Automotive trim and lashing wires
Product Photos
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative... Our company is located in Wuxi City, China, we are a stainless steel plate, seamless steel pipe, round steel, steel belt, decorative pipe and other products distribution wholesale private enterprise. Our company operates stainless steel plate, seamless steel pipe, round steel, steel belt, decorative...
