8/7/2019 AISI Type 430

1/3

AISI Type 430

Grade 430 is a ferritic, straight chromium, non-hardenable grade, combinininggood corrosion resistance and formability characteristic with useful mechanical

properties. It is easily formed and resists nitric acid. It is also used for appliancecomponents and motor vehicle trim, which are by far the most used applicationsfor this alloy.

Grade 430F is the free-machining version of this grade, available in bar form foruse in automatic screw machines. There is a grade that contains molybdenum,stainless steel alloy 434, known for having the same quality as grade 430, butalso having a greater resistance to corrosion.

430 have a great resistance to organic acids such as nitric acid. It is even moreresistant to corrosion when it is has been buffed or highly polished. Stresscorrosion cracking resistance of Grade 430 is very high, as it is for all ferriticgrades.

Solution Annealing heat to 815-845C, hold for hour per 25mm of thickness,slow furnace cool to 600C and then quickly air cool. Slow cooling from 540-400C will cause embitterment.

The best grade of alloy 430 for machining is grade 430F. While grade 430 ismore easily machined that 304 and other standard austenitic grades, it may stillgall, however.

Application :

Lining for dish washers

Refrigerator cabinet panels Automotive Trim Lashing Wire

Element supports Stove trim rings Fasteners

Chimney Liners

8/7/2019 AISI Type 430

2/3

Category Steel

Class Stainless steelType Ferritic standard

Common

NamesChromium steel

Designations France: AFNOR Z 8 C 17

Germany: DIN 1.4016

Italy: UNI X 8 Cr17

Japan: JIS SUS 430

Sweden: SS 2320

United Kingdom: B.S. 430 S 15

United States: AMS 5503 , AMS 5627 , ASME SA182 ,ASME SA240 , ASME SA268 , ASME SA479 , ASTM A176 ,

ASTM A182 , ASTM A240 , ASTM A268 , ASTM A276 , ASTM A314

, ASTM A473 , ASTM A479 , ASTM A493 , ASTM A511 ,

ASTM A554 , ASTM A580 , ASTM A651 , FED QQ-S-763 , FED QQ-S-766 , FED QQ-W-423 , FED STD-66 , MIL SPEC MIL-S-862 ,

SAE 51430 , SAE J405 (51430) , UNS S43000

Composition

Element Weight %

C 0.12

Mn 1.00

Si 1.00

Cr 16.0-18.0

P 0.04

S 0.03

Mechanical Properties

Properties Conditions

http://www.efunda.com/materials/elements/element_info.cfm?Element_ID=Chttp://www.efunda.com/materials/elements/element_info.cfm?Element_ID=Mnhttp://www.efunda.com/materials/elements/element_info.cfm?Element_ID=Sihttp://www.efunda.com/materials/elements/element_info.cfm?Element_ID=Crhttp://www.efunda.com/materials/elements/element_info.cfm?Element_ID=Phttp://www.efunda.com/materials/elements/element_info.cfm?Element_ID=Shttp://www.efunda.com/materials/elements/element_info.cfm?Element_ID=Chttp://www.efunda.com/materials/elements/element_info.cfm?Element_ID=Mnhttp://www.efunda.com/materials/elements/element_info.cfm?Element_ID=Sihttp://www.efunda.com/materials/elements/element_info.cfm?Element_ID=Crhttp://www.efunda.com/materials/elements/element_info.cfm?Element_ID=Phttp://www.efunda.com/materials/elements/element_info.cfm?Element_ID=S

8/7/2019 AISI Type 430

3/3

T (C) Treatment

Density (1000 kg/m3) 7.8 25

Poisson's Ratio 0.27-0.30 25

Elastic Modulus (GPa) 200 25 Tensile Strength (Mpa) 480

25annealed, hot finished (plate, sheet,

strip)more

Yield Strength (Mpa) 275

Elongation (%) 20

Reduction in Area (%) 45

Hardness (HRB) 88 (max) 25 annealed (plate, sheet, strip)

Thermal Properties

Properties Conditions

T (C) Treatment

Thermal Expansion (10-6/C) 10.4 0-100more

Thermal Conductivity (W/m-K) 26.1 100more

Specific Heat (J/kg-K) 460 0-100

Electric Properties

PropertiesConditions

T (C) Treatment

Electric Resistivity (10-9 -m) 600 25

http://www.efunda.com/units/convert_units.cfm?From=190&mrn=7800#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=25#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=25#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=319&mrn=200#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=25#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=339&mrn=480#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=339&mrn=480#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=25#ConvIntohttp://www.efunda.com/Materials/alloys/alloy_steels/show_alloy.cfm?ID=AISI_Type_430&show_prop=uts&Page_Title=Alloy%20Steel%20AISI%20Type%20430http://www.efunda.com/Materials/alloys/alloy_steels/show_alloy.cfm?ID=AISI_Type_430&show_prop=uts&Page_Title=Alloy%20Steel%20AISI%20Type%20430http://www.efunda.com/units/convert_units.cfm?From=339&mrn=275#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=339&mrn=275#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=25#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=876&mrn=1.04#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=0#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=100#ConvIntohttp://www.efunda.com/Materials/alloys/alloy_steels/show_alloy.cfm?ID=AISI_Type_430&show_prop=cte&Page_Title=Alloy%20Steel%20AISI%20Type%20430http://www.efunda.com/Materials/alloys/alloy_steels/show_alloy.cfm?ID=AISI_Type_430&show_prop=cte&Page_Title=Alloy%20Steel%20AISI%20Type%20430http://www.efunda.com/units/convert_units.cfm?From=245&mrn=26.1#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=100#ConvIntohttp://www.efunda.com/Materials/alloys/alloy_steels/show_alloy.cfm?ID=AISI_Type_430&show_prop=tc&Page_Title=Alloy%20Steel%20AISI%20Type%20430http://www.efunda.com/Materials/alloys/alloy_steels/show_alloy.cfm?ID=AISI_Type_430&show_prop=tc&Page_Title=Alloy%20Steel%20AISI%20Type%20430http://www.efunda.com/units/convert_units.cfm?From=886&mrn=460#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=0#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=100#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=392&mrn=6#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=25#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=190&mrn=7800#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=25#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=25#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=319&mrn=200#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=25#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=339&mrn=480#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=25#ConvIntohttp://www.efunda.com/Materials/alloys/alloy_steels/show_alloy.cfm?ID=AISI_Type_430&show_prop=uts&Page_Title=Alloy%20Steel%20AISI%20Type%20430http://www.efunda.com/units/convert_units.cfm?From=339&mrn=275#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=25#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=876&mrn=1.04#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=0#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=100#ConvIntohttp://www.efunda.com/Materials/alloys/alloy_steels/show_alloy.cfm?ID=AISI_Type_430&show_prop=cte&Page_Title=Alloy%20Steel%20AISI%20Type%20430http://www.efunda.com/units/convert_units.cfm?From=245&mrn=26.1#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=100#ConvIntohttp://www.efunda.com/Materials/alloys/alloy_steels/show_alloy.cfm?ID=AISI_Type_430&show_prop=tc&Page_Title=Alloy%20Steel%20AISI%20Type%20430http://www.efunda.com/units/convert_units.cfm?From=886&mrn=460#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=0#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=100#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=392&mrn=6#ConvIntohttp://www.efunda.com/units/convert_units.cfm?From=55&mrn=25#ConvInto