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Used for manufacturing cold punching molds with no big cross section and complicated shape as well as different measuring gauges and tools, etc.
Product Details
Standard：GB/T 1299-2000
Chemical Composition（%）
Standard | Steel Grade | C | Si | Mn | P≤ | S≤ | Cr | Mo | V | W |
DIN | 1.2510 | 0.90-1.05 | 0.15-0.35 | 1.00-1.20 | 0.035 | 0.035 | 0.50-0.70 | - | 0.05-0.15 | 0.50-0.70 |
ASTM | O1 | 0.85-1.00 | 0.10-0.50 | 1.00-1.40 | 0.030 | 0.030 | 0.40-0.60 | - | 0.30 | 0.40-0.60 |
GB | 9CrWMn | 0.85-0.95 | ≤0.40 | 0.90-1.20 | 0.030 | 0.030 | 0.50-0.80 | - | - | 0.50-0.80 |
Specification
Round bar | Diameter | Length | - |
Forged round bar：φ50~280 | 2000~6000 | - | |
Rolled round bar：φ10~80 | 2000~6000 | - | |
Flat bar | Thickness(mm) | Width(mm) | Length(mm) |
Forged plate：20~300 | 50~710 | 2000~6000 | |
Rolled plate： 10~65 | 155~610 | 2000~6000 |
Characteristics
1. 9CrWMn is low-alloy cold work tool steel.
2. With certain hardenability and abrasion resistance, homogenous and small-particle carbides.
Application
Used for manufacturing cold punching molds with no big cross section and complicated shape as well as different measuring gauges and tools, etc.
Delivery condition
Annealed, hardness≤ 235HB
Heat treatment:
Annealing after forging
Forging Technique
Item | Heat temperature | Start forging temperature | Finish forging temperature | Cooling |
steel ingot | 1150-1200 | 1100-1150 | ≥850 | Retarded cooling |
steel billet | 1100-1150 | 1050-1100 | ≥850 | Retarded cooling |
Quenching Technique
Preheat temperature | Heat temperature | Cooling | Hardness HRC | ||
medium | medium temperature | cooled down to oil temperature | |||
650 | 820-840 | Oil | 20-60 | 64-66 | |
Tempering Technique
Tempering temperature: | Heating medium | Cooling medium | Hardness HRC |
160-180 | oil | air | ≥61 |
170-230 | oil | air | 60-62 |
230-275 | oil or alkaline water | air | 56-60 |
