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Contact name:Vicky
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DIN933 DIN931 ASTM A453 Grade 660 A B C D hex head plug full partial thread
1. ASTM A453 Standard Specification
This specification covers five grades of bolting with twelve classes of yield strength ranging from 50 to120ksi[345 to 827 Mpa] for use in high-temperature service such as fasteners for pressure vessel and valve flanges. See Specification A962/A962M for the definition of bolting. The material requires special processing and is not intended for general purpose applications.
| ASTM A453 | Standard Specification for High-Temperature Bolting, with Expansion Coefficients Comparable to Austenitic Stainless Steels | |||
| Material Grade | Grade 660 A B C D | |||
2. ASTM A453 Grade 660 Chemical Composition
| Element | Content, % | Product Analysis Variation Over or Under, % |
| C | 0.08max | 0.01 over |
| Mn | 2.00max | 0.04 |
| P | 0.040max | 0.005 over |
| S | 0.030max | 0.005 over |
| Si | 1.00max | 0.05 |
| Ni | 24.0-27.0 | 0.20 |
| Cr | 13.5-16.0 | 0.20 |
| Mo | 1.00-1.50 | 0.05 |
| W | ... | ... |
| Ti | 1.90-2.35 | 0.05 |
| Co | ... | ... |
| Al | 0.35max | 0.05 over |
| V | 0.10-0.50 | 0.03 |
| B | 0.001-0.010 | 0.0004 under to 0.001 over |
| Cu | ... | ... |
ASTM A453 660 Mechanical Property Requirements
| Class | Tensile Strength min | Yield Strength (0.2% Offset), min | Elongation in 4*Diam, | Reduction of Area, min, % | Brinell Hardness Number | Approximate Rockwell Hardness, B and C | ||||
| ksi | Mpa | ksi | Mpa | min, % | Min | Max | ||||
| Grade | A,B, and C | 130 | 895 | 85 | 585 | 15 | 18 | 248-341 | 24HRC | 37HRC |
| D | 130 | 895 | 105 | 725 | 15 | 18 | 248-321 | 24HRC | 35HRC | |
3. ASTM A453 660 hex bolt surface treatment
Bright
PTFE plated/coated
4. ASTM A453 660 common package
