G41400
ASTM A193 Grade B7 Bolts are manufactured from 4140 Alloy Steel in accordance with ASTM A193 specification. Torqbolt is a prominent A193 gr B7 bolt supplier in India.
42Crmo4 Stud Bolts Astm A193 Grade B7 Stud Bolts Astm A193 Grade B7M Stud Bolts A194 Grade 7 Nuts Astm A194 Grade 7M Nuts Astm A320 Grade L7 Screws Astm A320 Grade L70 Bolts Astm A320 Grade L7M Stud Bolts
Grade | Description and UNS Designation |
C | Mn | P | S | Si | Cr | Mo | V | Al |
---|---|---|---|---|---|---|---|---|---|---|
ASTM A193 Grade B7 | Cr-MoC | 0.38-0.48D | 0.75-1.00 | 0.035 | 0.040 | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 | . . . | . . . |
Product Analysis VariationB | 0.02 | 0.04 | 0.005 | 0.005 | 0.02 | 0.05 | 0.02 | . . . | . . . |
Grade | Diameter, in. | Minimum Tempering Temperature, °F |
Tensile Strength, min, ksi | Yield Strength, min, 0.2 % offset, ksi |
Elongation in 4D, min, % | Reduction of Area, min, %Reduction of Area, min, % | Hardness, max |
---|---|---|---|---|---|---|---|
ASTM A193 Grade B7 Cr-Mo |
2 1⁄2 and under | 1100 | 125 | 105 | 16 | 50 | 321 HBW or 35 HRC |
over 2 1⁄2 to 4 | 1100 | 115 | 95 | 16 | 50 | 321 HBW or 35 HRC | |
over 4 to 7 | 1100 | 100 | 75 | 18 | 50 | 321 HBW or 35 HRC |
Class | Diameter,
[mm] |
Min.Tempering
Temp. °C |
Tensile Strength,
min, MPa |
Yield Strength,min,
.2% offset, MPa |
Elongation in 4D,
min, % |
Reduction of Area, min, % | Hardness,
max |
---|---|---|---|---|---|---|---|
ASTM A193M Grade B7 Cr-Mo |
M64 and under | 593 | 860 | 720 | 16 | 50 | 321 HBW or 35 HRC |
over M64 to M100 | 593 | 795 | 655 | 16 | 50 | 321 HBW or 35 HRC | |
over M100 to M180 | 593 | 690 | 515 | 18 | 50 | 321 HBW or 35 HRC |