Grade 3
Datasheet
ASTM Grade (UNS No.) | GRADE 3 (R50550) | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Chemical Composition (Max. values unless range is shown) | (wt. %) | 0.08C 0.05N 0.35O 0.30Fe 0.015H | ||||||||
TENSILE PROPERTIES | Guar.R.T. Min. | Typical Elevated Temperature Properties | ||||||||
93˚C (200˚F) | 204˚C (400˚F) | 315˚C (600˚F) | 426˚C (800˚F) | |||||||
Ultimate Strength | MPa (ksi) | 448 (65) | 469 (68) | 310 (45) | 262 (38) | 207 (30) | ||||
Yield Strength, 0.2% offset | MPa (ksi) | 379 (55) | 338 (49) | 207 (30) | 138 (20) | 117 (17) | ||||
Elongation in 51 mm (2") gage length | (%) | 18 | 24 | 35 | 33 | 22 | ||||
Reduction in Area - Bar, Billet & Forging only | (%) | 30 | ||||||||
OTHER MECHANICAL PROPERTIES | ||||||||||
Stress to Rupture in Time Shown | Stress | MPa (ksi) | 400 (58) | 300 (43) | 228 (33) | 138 (20) | ||||
Time-Hrs. at Temp. (˚C) | 1,000 (25) | 10,000 (100) | 10,000 (200) | 1,000 (250) | ||||||
Stress &Time to Produce Elongation Shown (creep) | Stress | MPa (ksi) | 283 (41) | 241 (35) | 83 (12) | 131 (19) | ||||
Time-Hrs. at Temp. (˚C) | 100 (25) | 1,000 (25) | 1,000 (315) | 1,000 (250) | ||||||
Creep | (%) | 1 | 1 | 1 | 1 | |||||
Charpy V-Notch Impact @ R.T. | Joules (ft-lbs) | 24 - 48 (18 - 35) | ||||||||
Bend Radius | Under 1.78 mm (0.070") thick | 2.0 - 2.5 x Thickness | ||||||||
1.78 mm (0.070") and over | 2.5 x Thickness | |||||||||
Welded Bend Radius | 2.5 - 3.0 x Thickness | |||||||||
Nominal Hardness | 90 HRB | |||||||||
PHYSICAL PROPERTIES | ||||||||||
Nominal Beta Transus | °C (°F) | 920 (1690) | ||||||||
Coefficient of Thermal Expansion 10-6/˚C (10-6/˚F) | 0-100˚C (32 -212˚F) | 8.6(4.8) | ||||||||
0-315˚C (32-600˚F) | 9.2(5.1) | |||||||||
0-538˚C (32-1000˚F) | 9.7 (5.4) | |||||||||
0-648˚C (32-1200˚F) | 10.1 (5.6) | |||||||||
0-816˚C (32-1500˚F) | 10.1 (5.6) | |||||||||
Density | g/cm3 (lbs/in3) | 4.51(0.163) | ||||||||
Melting Point, Approx. | °C (°F) | 1660 (3020) | ||||||||
Electrical Resistivity @ R.T. | 10-6 ohm•cm (10-6 ohm•in) | 56 (22) | ||||||||
Modulus of Elasticity – Tension | GPa (103 ksi) | 103 (15) | ||||||||
Modulus of Elasticity – Torsion | GPa (103 ksi) | 43 (6.2) | ||||||||
Thermal Conductivity | W/m•˚C (BTU/hr•ft•˚F) | 19.7 (11.4) | ||||||||
Specific Heat | J/Kg•˚C (BTU/lb•˚F) | 520 (0.124) | ||||||||
Weldability | Excellent | |||||||||
Industry Specifications | ASTM - B265, B337, B338, B348, B363, B381,B861, B862, F67; and AMS 4900 |