| Hot Rolled Steel (M20) |
235~345 |
|
| 1/4 hard (H01), 0.51≤t≤0.91 (B-Scale) |
290~370 |
(HR)
32~60 |
| 1/4 hard (H01), t＞0.91 (B-Scale) |
290~370 |
(HR)
34~63 |
| 1/4 hard (H01), 0.30≤t≤0.71 (Superficial 30T) |
290~370 |
(HR)
37~57 |
| 1/4 hard (H01), t＞0.711 (Superficial 30T) |
290~370 |
(HR)
38~64 |
| 1/2 Hard (H02), 0.51 ≤ t ≤ 0.91 (B-Scale) |
340~415 |
(HR)
51~68 |
| 1/2 Hard (H02), t > 0.91 (B-Scale) |
340~415 |
(HR)
52~70 |
| 1/2 Hard (H02), 0.30 ≤ t ≤ 0.71 (Superficial 30T) |
340~415 |
(HR)
50~62 |
| 1/2 Hard (H02), t > 0.711 (Superficial 30T) |
340~415 |
(HR)
51~67 |
| 3/4 hard (H03), 0.51≤t≤0.91 (B-Scale) |
380~455 |
(HR)
62~75 |
| 3/4 hard (H03), t＞0.91 (B-Scale) |
380~455 |
(HR)
63~77 |
| 3/4 hard (H03), 0.30≤t≤0.71 (Superficial 30T) |
380~455 |
(HR)
58~66 |
| 3/4 hard (H03), t＞0.711 (Superficial 30T) |
380~455 |
(HR)
59~70 |
| Hard (H04), 0.51 ≤ t ≤ 0.91 (B-Scale) |
420~495 |
(HR)
68~79 |
| Hard (H04), t > 0.91 (B-Scale) |
420~495 |
(HR)
69~81 |
| Hard (H04), 0.30 ≤ t ≤ 0.71 (Superficial 30T) |
420~495 |
(HR)
62~70 |
| Hard (H04), t > 0.711 (Superficial 30T) |
420~495 |
(HR)
64~71 |
| Superhard (H06), 0.51 ≤ t ≤ 0.91 (B-Scale) |
460~540 |
(HR)
74~82 |
| Superhard (H06), t > 0.91 (B-Scale) |
460~540 |
(HR)
76~84 |
| Superhard (H06), 0.30 ≤ t ≤ 0.71 (Superficial 30T) |
460~540 |
(HR)
66~73 |
| Superhard (H06), t > 0.711 (Superficial 30T) |
460~540 |
(HR)
67~72 |
| Spring (H08), 0.51 ≤ t ≤ 0.91 (B-Scale) |
505~570 |
(HR)
78~84 |
| Spring (H08), t > 0.91 (B-Scale) |
505~570 |
(HR)
77~86 |
| Spring (H08), 0.30 ≤ t ≤ 0.71 (Superficial 30T) |
505~570 |
(HR)
69~74 |
| Spring (H08), t > 0.711 (Superficial 30T) |
505~570 |
(HR)
70~73 |
| Extra spring (H10)，0.51≤t≤0.91 (B-Scale) |
≥540 |
(HR)
≥80 |
| Extra spring (H10)，t＞0.91 (B-Scale) |
≥540 |
(HR)
≥80 |
| Extra spring (H10)，0.30≤t≤0.71 (Superficial 30T) |
≥540 |
(HR)
≥70 |
| Extra spring (H10)，t＞0.711 (Superficial 30T) |
≥540 |
(HR)
≥71 |
