ASTM SA-36 is the most commonly used mild and hot-rolled steel. It has excellent welding properties and is suitable for grinding, punching, tapping, drilling, and machining processes. The yield strength of ASTM SA36 is less than that of cold roll C1018, thus enabling ASTM SA36 to bend more readily than C1018. Normally, larger diameters in ASTM SA36 are not produced since C1018 hot roll rounds are used.
ASTM SA36 steel has the following applications:
It is used in bolted, riveted or welded construction of bridges, buildings and oil rigs.
It is used in forming tanks, bins, bearing plates, fixtures, rings, templates, jigs, sprockets, cams, gears, base plates, forgings, ornamental works, stakes, brackets, automotive and agricultural equipment, frames, machinery parts.
It is used for various parts obtained by flame cutting such as in parking garages, walkways, boat landing ramps and trenches.
Standard – IS 2062 GR E250 , E350 , E410 AND E450 A / B / BO / BR, A36, etc
Addition to other grades:
MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, M2, M35, M42, 2714, SKD-11, P20, P20+S, P20+Ni, SCM 420, ASTM SA-36, ASTM SA-105, SAE 1018, SAE 1020, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE 52100, S40C, S355J2G3.
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The following table shows the chemical composition of ASTM SA-36 steel:
|Tensile Strength, Ultimate||400 – 550 MPa||58000 – 79800 psi|
|Tensile Strength, Yield||250 MPa||36300 psi|
|Elongation at Break (in 200 mm)||20.0 %||20.0 %|
|Elongation at Break (in 50 mm)||23.0 %||23.0 %|
|Modulus of Elasticity||200 GPa||29000 ksi|
|Bulk Modulus (typical for steel)||140 GPa||20300 ksi|
|Shear Modulus||79.3 GPa||11500 ksi|
119 – 159
1614°C – 1599°C
Hardening at 788°C – 816°C(1450°F-1500°F)
A36 is low carbon steel, it is not suited for heat treatment. So can’t harden. If need hardening, heat to 880-910°C, then quenching in water and temper.
|Density||7.85 g/cm3||0.284 lb/in3|
Thermal Conductivity, W/m-K – 50 – 42
Thermal Expansion, µm/m-K – 11 to 13
Preheat slowly, then increase the temperature more rapidly to forging temperature. Then cool slowly
Stress relieving at 677°C – 927°C(1250°F-1700°F)
Normalizing at 899°C – 954°C (1650°F-1750°F)
Annealing at 843°C – 871°C(1550°F-1600°F)
|Density||7.85 g/cm3||0.284 lb/in3|
The machinability rate of ASTM SA36 is estimated to be 72%, and the average surface cutting feed of ASTM SA36 is 120 ft/min. Machining of ASTM SA36 steel is not as easy as that of AISI 1018 steel.
ASTM SA36 steel is easy to weld using any type of welding method, and the welds and joints so formed are of excellent quality.
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