In tool steel standard ASTM A681, shock-resisting tool steels are designated as group S steels according to the AISI classification system. S1, S2, S5, S6, and S7 are the types of shock-resisting tool steels. AISI S7 tool steel is a shock-resistant air hardening steel. AISI S7 steel has exceptional impact properties plus the highest hardenability of shock resisting grades of tool steel. Steel S7 also possesses good softening resistance at high temperatures which gives it hot work capabilities. Since S7 steel hardens in air, it is also safe and stable in heat treatment.
AISI S7 tools steel has an unusual combination of properties, making it suitable for an extremely wide range of tool and die work – where shock-resistance, medium hot-work properties, or ease of machining and heat-treatment are most important.
Chemical Composition:
Grade | C | Si | Mn | P | S | Cr | V | Mo |
S7 | 0.45-0.55 | 0.20-1.00 | 0.20-0.90 | ≤0.030 | ≤0.030 | 3.00-3.50 | ≤0.35 | 1.30-1.80 |
Noted:
(1) Delivery condition:Annealed,milled/turned surface
(2) Process:Electric furnace melted,ladle refined and vacuum degassed.
(3) UT Class:SEP 1921/84,Group 3,100% volume,level D/d、C/c.
(4) Grain size:≥5
(5) Hardness:≤ HB248
(6) Allowance on quantity/weight:-/+10% per item.
(7) Delivery Port:Wuhan/Shanghai/Huangshi port.
(8) Delivery time: 45 days for forged materials,and 75 days for rolled materials.
(9) Payment term:30% in advance and balance will be paid against copy of BL.
(10) Price validity:15 days
Products’ Specifications : |
Round bars | Hot Rolled:Ø10-Ø60mm | Forged:Ø60-Ø600mm | Length:2.5-5.8 |
Plates | Hot Rolled:(10-60)x(200-600) | Forged:(60-300)x(200-810) | Length:2.5-5.8 |
Square Bars: According to the requirements of Customers. |
Formed forgings of shaft and disc types |