INTRODUCTION
Grade 430 is a ferritic, straight chromium, non-hardenable grade,
combining good corrosion resistance and formability characteristics
with useful mechanical properties. Its ability to resist nitric
acid attack permits its use in specific chemical applications but
automotive trim and appliance components represents its largest
fields of application.
Grade 430F is the free-machining version of this grade, available
in bar form for use in automatic screw machines. Grade 434 is the
molybdenum bearing version of Grade 430 and has the same useful
combination of properties. Its molybdenum addition improves
corrosion resistance.
APPLICATIONS
Typical applications for 430 grade include:
- Linings for dish washers
- Refrigerator cabinet panels
- Automotive trim
- Lashing Wire
- Element Supports
- Stove trim rings
- Fasteners
- Chimney Liners
Typical applications for 430F grade include:
- Repetition machined components
| Steel Grade | 430 / 430F | Application | Mentioned above |
| Shape | Round Bar | Standard | GB, ASTM, DIN,JIS |
| Dimension | Φ4-800 mm; length below 10m | Surface | Black, Bright, Polished, Peeled |
| Technique | Cold drawn; Hot rolled; Forged | Ultrasonic Test | 100% UT Passed |
DELIVERY CONDITIONS
| Diameter (mm) |
| Cold drawn | 4-60 |
| Peeled | 30-100 |
| Grinded | 4-600 |
| Turned | 130-800 |
| Hot Rolled | 20-280 |
| Hot Forged | 130-800 |
EQUIVALENT GRADES OF ASTM 430 / 430F
- JIS G4303: SUS430
- ASTM/ASME: UNS S43000
- EURONORM: X12Cr13
- DIN: 1.4016
CHEMICAL COMPOSITION (%)
| C | Si | Mn | P | S | Cr |
| 430 | ≤ 0.12 | ≤ 1.00 | ≤ 1.00 | ≤ 0.040 | ≤ 0.030 | 16.00 1800 |
| 430F | ≤ 0.12 | ≤ 1.00 | ≤ 1.25 | ≤ 0.060 | ≥ 0.150 | 16.00 18.00 |
MECHANICAL PROPERTIES
| Grade | Tensile Strength ksi (min) | Yield Strength 0.2% ksi (min) | Elongation % | Hardness (Brinell) MAX | Hardness (Rockwell B) MAX |
| 430 | 450 | 205 | 22 | 89 | 183 |
| 430F | 552 | 379 | 25 | / | 262 |
POSSIBLE ALTERNATIVE GRADES TO 430
| Grade | Reason it may be chosen instead of 430 |
| 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, together with greatly
ability to be welded and cold formed |
| 3CR12 | A lower corrosion resistance is acceptable in a cost-critical
application |
RESISTANCE
Corrosion Resistance
Grade 430 has good resistance to a wide variety of corrosive
enviornments, including nitric acid and some organic acids. It
attains its maximum corrosion resistance when in the highly
polished or buffed condition. In general its resistance to pitting
and crevice corrosion resistance is close to that of grade 304.
Stress corrosion cracking resistance of Grade 430 is very high, as
it is for all ferritic grades.
Like other high-sulphur free machining grades 430F has much reduced
resistance to pitting and crevice corrosion compared to its
non-free machining equivalent.
Heat Resistance
Grade 430 resists oxidation in intermittent service up to 870°C and
to 815°C in continuous service. This grade may become brittle at
room temperature after prolonged heating in the 400-600°C range.
This effect can be eliminated by annealing.
PROCESSING
- Solution Annealing – Heat to 815-845°C, hold for ½ hour per 25mm of
thickness, slow furnace cool to 600°C and then quickly air cool.
Slow cooling from 540-400°C will cause embrittlement.
- Sub-Critical anneal – Heat to 760-815°C and then air cool or water
quench.
- This grade is not hardenable by thermal treatment.
Welding
- Pre-heat at 150-200°C if welding is necessary.
- Embrittlement in the weld metal and heat affected zone can be
relieved by a post-weld anneal at 790-815°C
- Grain refinement will not occur.
Machining
- Easier to machine than the standard austenitic grades such as 304.
- Still a tendency for galling and pick-up on the cutting tool.
- Bars that have been lightly drawn are easier to machine than those
in the annealed condition.
- Grade 430F, the free machining version of 430, is very much easier
to machine.
Fabrication
- Lower work hardening rate makes bending and forming somewhat easier
than for grade 304
- Lower ductility restricts very severe operations.
- Severe bends should be made with the bend axis at right angles to
the rolling direction.
- Severe cold heading of 430 wire is possible.
What we can offer?
-We offer a wide range of steel products in a wide variety of
dimensions and executions, according to the common international
specifications or customize.
-Machining and heat treatment are available.
-Also, we advise you in choosing the right materials.
Shape Available
- Solid round bar
- Flat bar
- Square bar
- Hexagon bar
- Block
- Plate
- Sheet
- Wire rod
- Strip
Our Advantages
- High mechanical property and quenching, enable the surface share
equal hardness after deal with it
- Good polishing and low roughness
- Making the heat-treatment to harden condition before using it
- Competitive price
- Fast production lead-time
- All the material are inspected with 3 times to meet the highly
standards
- Pure steel quality & stable quality to be guarantee
OUR AVAILABLE STAINLESS STEEL PRODUCTS ARE AS BELOW
PAYMENT AND SHIPPING
1. Both T/T and L/C will be acceptable
2. Trade Terms: FOB, CIF, CFR
3. The delivery will be in 10-15 days if have stock; For customized
items, the delivery will be negotiated by both parties
4. Shipping by sea freight from Shanghai Port (PRC) for Bulk
orders, by airfreight or express for samples
COMPANY INFORMATION
Shanghai Unite Steel Trading Co., Ltd
We are committed to integrate engineering steel resources in china
and serve the global engineering steel market. Our company has more
than 15 years of experience in steel researching, production,
managing and sales. And our team mostly are based on and worked in
national famous steel enterprise.
In the aspect of resources and information, we have established
cooperative and stronger relationship with nearly hundred
enterprises, either state-owned or private owned in china.
What’s more, we have built long, deep and close business
relationship with dozens of steel company, Sharing and holding
equities with several steel enterprises. Because of the close
cooperation with steel companies and our pioneering spirit, which
can ensure us stay at the top competition, and ensure our customers
get what they really want!
FAQ
Q: Are you a manufacturer or merely a trader?
A: We are group of companies and owned manufacturer bases and
trading company. We specialized in special steel which include
alloy structural steel and carbon steel and stainless steel, etc.
All material are with high quality and competitive price.
Q: How do you guarantee the quality of your product?
A: Firstly, we can provide the certificates from the third party,
such as TUV, CE, if you need. Secondly, we have a complete set of
inspection system and every process is checked by QC. Quality is
the lifeline of enterprise survival.
Q: Delivery time?
A: We have ready stock for most of material grades in our
warehouse. If the material doesn't have stock, the delivery lead
time is about 5-30 days after receiving your prepayment or firm
order.
Q: What is the payment term?
A: T/T or L/C.
Q: Can we visit your company and factory?
A: Yes, warmly welcome! We can book the hotel for you before you
come to China and arrange our driver to our airport to pick you up
when you come.
CONTACT US
We are happy to answer your questions and make you an offer for
these and other materials. Contact us now for more information.
Your Contact Person
Ms Chilli Ho
Phone/Wechat/Whatsapp +86-181-0187-5575
Skype: chilli.ho@outlook.com
Email: chilli.ho@shunitesteel.com
