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Elmet Technologies

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Schmolz + Bickenbach UGIMA® 303 Stainless Steel Bar
Categories: Metal; Ferrous Metal; Stainless Steel; T 300 Series Stainless Steel

Material Notes: 303 UGIMA® is Ugitech’s improved machining grade produced only by Ugitech. It is identical in every way to regular 303, except with respect to machinability. 303 UGIMA® represents Ugitech's popular UGIMA® family of high machinability grades. Through the use of new and beneficial modifications to the steel-making process, 303 UGIMA® builds upon the proprietary UGIMA® manufacturing process to allow for excellent machinability across a wider range of operations and cutting conditions. When compared with older versions, 303 UGIMA® is a technologically advanced product that will allow for superior machinability at both low and high speeds, in cam-driven and CNC machines, and with high-speed steel or carbide tooling. Machine shops using 303 UGIMA® have experienced consistent success regardless of machine, operation, tooling, or cutting conditions. From lot to lot, 303 UGIMA® is engineered to give the same high performance every time without surprises.

Applications: Fasteners, Shafts, Valve Bodies, Valves, Valve Trim, Fittings, Machined parts, and Not recommended for vessels containing liquid or gasses at high pressures

Information provided by Schmolz + Bickenbach

Key Words: AISI 303; UNS S30300; EN 10088-3 1.4305; X8CrNiS 18-8; SAE J405; ASTM A314; ASTM A320 Class 1; A484; A581; A582; F899; AMS 5640 Type 1; QQ-S-763C; QQ-S_764B, Amend 2; MIL-S-862; MIL-W-52263C
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Physical PropertiesOriginal ValueComments
Density 0.285 lb/in³
 
Mechanical PropertiesOriginal ValueComments
Hardness, Brinell 220 - 240Escomatic Coils
 170 - 190
@Thickness >=25.4 mm
Turned Bars
 220 - 240
@Thickness <=25.4 mm
Cold Drawn Bars
Tensile Strength 95.0 - 120 ksiEscomatic Coils
 85.0 - 100 ksi
@Thickness >=25.4 mm
Turned Bars
 95.0 - 120 ksi
@Thickness <=25.4 mm
Cold Drawn Bars
Tensile Strength, Yield 70.0 - 100 ksi
@Strain 0.2 %
Escomatic Coils
 35.0 - 55.0 ksi
@Strain 0.2 %,
Thickness >=25.4 mm
Turned Bars
 70.0 - 100 ksi
@Strain 0.2 %,
Thickness <=25.4 mm
Cold Drawn Bars
Elongation at Yield >= 30 %Escomatic Coils
 >= 30 %
@Thickness <=25.4 mm
Cold Drawn Bars
 >= 50 %
@Thickness >=25.4 mm
Turned Bars
Reduction of Area >= 45 %Escomatic Coils
 >= 45 %
@Thickness <=25.4 mm
Cold Drawn Bars
 >= 60 %
@Thickness >=25.4 mm
Turned Bars
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 0.0000730 ohm-cm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 9.30 µin/in-°F
@Temperature 20.0 - 200 °C
Thermal Conductivity 106 BTU-in/hr-ft²-°F
@Temperature 20.0 °C
 
Processing PropertiesOriginal ValueComments
Annealing Temperature 1850 - 2000 °FFollowed by rapid cooling with forced air or water quenching
Hot-Working Temperature 1750 - 2200 °FForging range
 2150 - 2200 °FHeat in range
 
Component Elements PropertiesOriginal ValueComments
Carbon, C <= 0.15 %
Chromium, Cr 17 - 19 %
Copper, Cu <= 1.0 %
Iron, Fe 65.9 - 69.9 %
Manganese, Mn <= 2.0 %
Molybdenum, Mo <= 0.60 %
Nickel, Ni 8.0 - 10 %
Phosphorus, P <= 0.20 %
Silicon, Si <= 1.0 %
Sulfur, S >= 0.15 %
 
Descriptive Properties
Corrosion ResistanceAcetic Acid2/4
 Humidity3/4
 NaCl (Saline Mist)2/4
 Nitric Acid3/4
 Phosphoric Acid2/4
 Sodium Carbonate2/4
 Sulfuric Acid2/4

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Users viewing this material also viewed the following:
303 Stainless Steel, annealed
AISI 303 Cast Stainless Steel, ASTM A582
AISI 303 Cast Stainless Steel, EN 10088
AISI 303 Cast Stainless Steel, UNS J92511
Schmolz + Bickenbach UGIMA® 303 HD Stainless Steel Bar

NSCHMO031 / 125904

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