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specification
1.grade:Gr52.standard:ASTM B348, ASTM B381, ASTM F136, AMS 49283.size:Dia.25mm-350mm *length 10mm-300mm
4.Chemical requirements
N | C | H | Fe | O | Al | V | Pa | Mo | Ni | Ti | |
Gr 1 | 0.03 | 0.08 | 0.015 | 0.20 | 0.18 | / | / | / | / | / | bal |
Gr 2 | 0.03 | 0.08 | 0.015 | 0.30 | 0.25 | / | / | / | / | / | bal |
Gr 3 | 0.05 | 0.08 | 0.015 | 0.30 | 0.35 | / | / | / | / | / | bal |
Gr 4 | 0.05 | 0.08 | 0.015 | 0.50 | 0.40 | / | / | / | / | / | |
Gr 5 | 0.05 | 0.08 | 0.015 | 0.40 | 0.20 | 5.5~6.75 | 3.5~4.5 | / | / | / | bal |
Gr 7 | 0.03 | 0.08 | 0.015 | 0.30 | 0.25 | / | / | 0.12~0.25 | / | / | bal |
Gr 9 | 0.03 | 0.08 | 0.015 | 0.25 | 0.15 | 2.5~3.5 | 2.0~3.0 | / | / | / | bal |
Gr12 | 0.03 | 0.08 | 0.015 | 0.30 | 0.25 | / | / | / | 0.2~0.4 | 0.6~0.9 | bal |
5.Tensile requirements
grade | Tensil strength(min) | Yeild strength(min) | Elongation(%) | ||
ksi | MPa | ksi | MPa | ||
1 | 35 | 240 | 20 | 138 | 24 |
2 | 50 | 345 | 40 | 275 | 20 |
3 | 65 | 450 | 55 | 380 | 18 |
4 | 80 | 550 | 70 | 483 | 15 |
5 | 130 | 895 | 120 | 828 | 10 |
7 | 50 | 345 | 40 | 275 | 20 |
9 | 90 | 620 | 70 | 438 | 15 |
12 | 70 | 438 | 50 | 345 | 18 |
craft:hot-rooled hot-forged cold-rooled cold-forged cold-finished
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