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DIN 1.2355 Tool Steel Round Bar
Type:Plate/Round bar/Flat bar
Delivery condition: Annealed black surface/Turned bright surface
Products Description
DIN 1.2355 tool steel is a Shock-Resisting Steel with the highest hardenability and elevated temperature softening resistance of the S-series steels. Due to these properties, S7 material is popular in shock-resistant applications. They are moderately resistant to decarburization and grain growth.
Product characteristics
1. High impact toughness, good wear resistance
2. Excellent toughness under high strength
3. High hardenability and softening resistance
4. Excellent mechanical fatigue resistance
1.2355 Steel Applications
Mak impact and softening resistant tools, such as: tool industry - punch, forging die, hammer, chisel, clamp die, cutting tool, sword;
Also Suitable for impact tools and plastic moulds for hot and cold work.
Products parameters
| AISI S7 Tool Steel Equivalent Material | |||||||||
| US | European Union | ISO | Germany | China | |||||
| Standard | Steel (UNS) | Standard | Steel Name (Material Number) | Standard | Designation | Standard | Steel Name (Material Number) | Standard | Steel Grade |
| AISI, SAE; ASTM A681 |
S7 (T41907) | EN ISO 4957 | 5OCrMoV13-15 (1.2355) | ISO 4957 | 5OCrMoV13-15 | DIN EN ISO 4957; DIN 17350, |
5OCrMoV13-15 (1.2355) | GB/T 1299 | 5C |
1.2355 Chemical Composition %
| Standard | AISI (UNS) | C | Si | Mn | P, ≤ | S, ≤ | Cr | Mo | V, ≤ |
| ASTM A681 | S7 (T41907) | 0.45-0.55 | 0.20-1.00 | 0.20-0.90 | 0.030 | 0.030 | 3.00-3.50 | 1.30-1.80 | 0.35 |
DIN 1.2355 Physical Properties
| Physical Properties | Metric | Imperial |
| Density | 7.76 g/cm3 | 0.280 lb/in3 |
| Coefficient of thermal expansion (CTE) | 12.6 μm/m·K (20-200 °C) | 7.0 μin./in.°F (70-400 °F) |
| 13.3 μm/m·K (20-425 °C) | 7.4 μin./in.°F (70-800 °F) | |
| 13.7 μm/m·K (20-500 °C) | 7.6 μin./in.°F (70-930 °F) | |
| 13.3 μm/m·K (20-200 °C) | 7.4 μin./in.°F (70-1200 °F) |
Mechanical Properties of S7 Steel
Nominal room-temperature mechanical properties of S7 steel
| Steel | Condition, Fan cooled from 940 °C (1725 °F) and single tempered at: | Tensile strength, MPa (ksi) | 0.2% yield strength, MPa (ksi) | Elongation in 2 in. (50mm), % | Reduction in area, % |
Hardness, HRC | Charpy unnotched impact, J (ft·lbf) |
| S7/1.2355 | 205 °C (400 °F) | 2170 (315) | 1450 (210) | 7.0 | 20 | 58 | 244 (180) |
| 315 °C (600 °F) | 1965 (285) | 1585 (230) | 9.0 | 25 | 55 | 309 (228) | |
| 425 °C (800 °F) | 1895 (275) | 1410 (205) | 10.0 | 29 | 53 | 243 (179) | |
| 540 °C (1000 °F) | 1820 (264) | 1380 (200) | 10.0 | 33 | 51 | 324 (239) | |
| 650 °C (1200 °F) | 1240 (180) | 1035 (150) | 14.0 | 45 | 39 | 358 (264) | |
| Annealed | 640 (93) | 380 (55) | 25.0 | 55 | 95 HRB | – |
Product Picture
Our factory
Steel Making
Ingot Production
Forged Bars
Machinary
Heat Treat for S7 Shock-resisting Tool Steel
The heat treating of S7 tool steel is listed below.
Normalizing and Annealing Temperatures
Normalizing: Do not normalize.
Annealing: 815-845 °C (1500-1550 °F), the upper limit of the range should be used for large sections and the lower limit for smaller sections. Time held at temperature varies from 1 hour for light sections to 4 hours for heavy sections and large furnace charges of high alloy steel.
Rate of cooling: ≤ 14 °C/h (25 °F/h)
Annealed Brinell hardness: 187-223 HB.
S7 Material Hardening and Tempering
Rate of heating: Slowly
Hardening
Preheat temperature 650-705 °C (1200-1300 °F);
Austenitizing temperature 925-955 °C (1700-1750 °F)
Time at temperature: 14-45 minutes for open furnace heat treatment
Quenching medium: Air or oil
Quenched Rockwell C hardness, 60-61 HRC
Tempering temperature: 205-620 °C (400-1150 °F)
Approximate tempered Rockwell C hardness: 45-57 HRC
Applications
S7 steel is primarily used for chisels, punches, rivet sets, stamps, screwdrivers and other applications that require high toughness and resistance to shock loads. Also used for hot punching and shearing where some heat resistance is required.
Packing & Delivery
Packing & Delivery
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The inner size of container is below:
-- 20ft GP: 5.8m(length) x 2.13m(width) x 2.18m(high)
-- 40ft GP: 11.8m(length) x 2.13m(width) x 2.18m(high)
-- 40ft HG: 11.8m(length) x 2.13m(width) x 2.72m(high)
Our Service
1. We are a specialized manufacturer. Competitive price and quality from our own factory .
2. Best service with 24 hour`s reply .
3. Flexible payment with T/T,L/C , etc .
4. Smooth production ability(1000tons/month).
5. Quick delivery and standard exporting package
Cool tags: din 1.2355 tool steel round bar
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