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Description
Chemical Composition
Mechanical Properties
More
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►GENERAL CHARACTERISTICS OF STAINLESS STEEL Stainless Steel 403
Type 403 stainless is a martensitic alloy, very similar to stainless type 410, with the exception of a slightly lower maximum silicon content and a slightly lower maximum chromium content. Good levels of strength, toughness and ductility may be obtained with this alloy.
►Stainless Steel 403 Inventory Size Ranges
Plates / Sheets
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Steel Bar
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Coil / Stri
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0.08-200mm(T)*W*L
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Φ8-1200mm*L
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0.03-16.0xLmm
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APPLICATIONS
This alloy may be used for steam turbine buckets, blades, bucket covers, gas turbine compressor blades, nuclear reactor control rod mechanisms, forged valves, fasteners, shafting, pump parts and machine parts
FORGING
This alloy may be readily forged, headed or upset. It requires more blows or a heavier hammer than does mild steel. It should be heated uniformly to 2000/2200ºF (1095/1205ºC), depending upon the degree of deformation, then forged and air cooled. Large forgings should be furnace cooled or cooled in dry lime. This grade should not be forged below 1650ºF (900ºC).
HEAT TREATMENT
ANNEALING
Parts should be heated uniformly to 1200/1400ºF (650/760ºC) and air cooled. Optimum machinability is obtained by a lowering of the annealing temperature to give a slightly higher hardness. For maximum softness heat to 1500/1650ºF (815/900ºC) and slow furnace cool to give approximately 155 BHN. Maximum softness may be required for subsequent cold forming, for cold heading for instance.
HARDENING
Heat to 1750/1850ºF (955/1010ºC), soak and quench in oil or air cool.
TEMPERING
Temper at temperatures appropriate to produce desired mechanical properties. Soak for at least one hour, longer for larger sections, and air cool.
If this alloy is tempered in the range 750/1050ºF (400/565ºC) there will be a decrease in impact strength and in corrosion resistance – depending upon the media. If tempering in this range is necessary to obtain the desired strength and ductility values, it may be that in many cases the reduced impact strength is not a problem and that the corrosion resistance is only slightly reduced.
MACHINABILITY
In its softest condition, type 403 stainless is tough and chips build up on tools. Better finishes are obtained in the cold drawn or heat-treated condition. If higher mechanical properties are required, the material can be machined up to Rc 35.
WELDABILITY
Type 403 may be satisfactorily welded. Parts should be preheated at 350/400ºF (180/205ºC) to prevent cracking, particularly in heavy sections. Since the alloy is air hardening, parts should be annealed immediately after welding.
Not finding what you are looking for? Connect with our sourcing group at pb@longhaisteel.com
►Stainless Steel 403 Chemical Composition
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Composition
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(wt %)
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C
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Carbon
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0.15 max.
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Mn
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Manganese
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1.00 max.
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P
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Phosphorus
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0.040 max.
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S
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Sulfur
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0.030 max.
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Si
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Silicon
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0.50 max.
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Cr
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Chromium
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11.00 -13.00
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Please contact us for more details. The technical data provided is for information only and not for design purposes.
►Stainless Steel 403 Mechanical Properties
TYPICAL MECHANICAL PROPERTIES
| Condition |
Condition |
| Brinell Hardness |
Elastic (Young's, Tensile) Modulus |
Elongation at Break |
Fatigue Strength |
Poisson's Ratio |
Reduction in Area |
Rockwell B Hardness |
Shear Modulus |
Shear Strength |
Tensile Strength: Ultimate (UTS) |
Tensile Strength: Yield (Proof) |
| Annealed |
190 |
190GPa |
25% |
200MPa |
0.28 |
50% |
83 |
76GPa |
340MPa |
530MPa |
280MPa |
| Hardened |
240 |
190GPa |
16% |
340MPa |
0.28 |
47% |
83 |
76GPa |
480MPa |
780MPa |
570MPa |
Please contact us for more details. The technical data provided is for information only and not for design purposes.
►Stainless Steel 403 Physical Properties
The values reported below are typical for Stainless Steel 403 in the annealed condition.
Thermal Properties
•Latent Heat of Fusion:270 J/g
•Maximum Temperature: 390 °C730 °F
•Maximum Temperature: Mechanical:740 °C1360 °F
•Melting Completion (Liquidus):1450 °C2640 °F
•Melting Onset (Solidus):1400 °C2560 °F
•Specific Heat Capacity:480 J/kg-K0.11 BTU/lb-°F
•Thermal Conductivity:28 W/m-K16 BTU/h-ft-°F
•Thermal Expansion:9.9 µm/m-K
Electrical Properties
•Electrical Conductivity: Equal Volume 2.9 % IACS
•Electrical Conductivity: Equal Weight (Specific) 3.3 % IACS
Otherwise Unclassified Properties
•Base Metal Price:6.5 % relative
•Density:7.8 g/cm3480 lb/ft3
•Embodied Carbon:1.9 kg CO2/kg material
•Embodied Energy:27 MJ/kg11 x 103 BTU/lb
•Embodied Water:99 L/kg12 gal/lb
Common Calculations
•PREN (Pitting Resistance) 12
•Resilience: Ultimate (Unit Rupture Work) 110 MJ/m3
•Resilience: Unit (Modulus of Resilience) 210 kJ/m3
•Stiffness to Weight: Axial 14 points
•Stiffness to Weight: Bending 25 points
•Strength to Weight: Axial 19 points
•Strength to Weight: Bending 19 points
•Thermal Diffusivity 7.6 mm2/s
•Thermal Shock Resistance 20 points
The values reported below are typical for Stainless Steel 403 in the hardened condition.
Thermal Properties
•Latent Heat of Fusion:270 J/g
•Maximum Temperature: 390 °C730 °F
•Maximum Temperature: Mechanical:740 °C1360 °F
•Melting Completion (Liquidus):1450 °C2640 °F
•Melting Onset (Solidus):1400 °C2560 °F
•Specific Heat Capacity:480 J/kg-K0.11 BTU/lb-°F
•Thermal Conductivity:28 W/m-K16 BTU/h-ft-°F
•Thermal Expansion:9.9 µm/m-K
Electrical Properties
•Electrical Conductivity: Equal Volume 2.9 % IACS
•Electrical Conductivity: Equal Weight (Specific) 3.3 % IACS
Otherwise Unclassified Properties
•Base Metal Price:6.5 % relative
•Density:7.8 g/cm3480 lb/ft3
•Embodied Carbon:1.9 kg CO2/kg material
•Embodied Energy:27 MJ/kg11 x 103 BTU/lb
•Embodied Water:99 L/kg12 gal/lb
Common Calculations
•PREN (Pitting Resistance) 12
•Resilience: Ultimate (Unit Rupture Work) 120 MJ/m3
•Resilience: Unit (Modulus of Resilience) 840 kJ/m3
•Stiffness to Weight: Axial 14 points
•Stiffness to Weight: Bending 25 points
•Strength to Weight: Axial 28 points
•Strength to Weight: Bending 24 points
•Thermal Diffusivity 7.6 mm2/s
•Thermal Shock Resistance 29 points
Please contact us for more details. The technical data provided is for information only and not for design purposes.
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