Carbon Steel
Plain carbon steels for general engineering, shafts, plate and tube — 1020, 1045, S50C, 1518.
1.0715 (11SMn30)
11SMn30 (1.0715) is Europe’s standard sulfur free-cutting steel under EN 10087: about 0.30% sulfur and almost no silicon…
1.0718 (11SMnPb30)
11SMnPb30 (1.0718) is the leaded version of 11SMn30 and one of the fastest-machining bar steels in the EN system. The le…
1.0721 (10S20)
10S20 (1.0721) is a case-hardening free-cutting steel under EN 10087: moderate sulfur (0.15–0.25%) balances machinabilit…
1.0737 (11SMnPb37)
11SMnPb37 (1.0737) pushes the EN leaded free-cutting concept furthest: sulfur raised to 0.34–0.40% and manganese to 1.00…
1008
1008 is a very low carbon steel with excellent cold formability and weldability. It is the standard grade for cold-heade…
1010
1010 is a low carbon steel for lightly loaded parts that need good formability, weldability and an optional carburized c…
1015
1015 is a low carbon carburizing-grade steel for small parts needing a hard wear surface over a ductile core. It bridges…
1018
1018 is one of the most commonly stocked cold drawn bars in North America: a low carbon steel with higher manganese than…
1022
1022 is a low carbon, higher manganese steel with better hardenability than 1020 at the same carbon level. It is used fo…
1025
1025 is a low-medium carbon steel for general machinery parts that need a step up in strength from 1020 while keeping go…
1030
1030 is a medium carbon steel at the lower edge of the heat-treatable range: it responds to quenching in thin sections a…
1035
1035 is a medium carbon steel for shafts and forged parts of moderate strength. It heat treats more reliably than 1030 a…
1038
1038 is a medium carbon steel widely used in North American cold drawn and hot rolled bar for shafts and bolts. It sits …
1040
1040 is a medium carbon steel for moderately stressed shafts, bolts and gears. It is the plain-carbon predecessor of 514…
1045
1045 is the world’s most common medium-carbon steel — the default for shafts, hydraulic rods and plates that need more s…
1050
1050 is a medium-high carbon steel whose chemistry matches JIS S50C and EN C50. It is used for wear-exposed shafts, spri…
1055
1055 is a high-medium carbon steel for parts needing a hard, wear-resistant surface with a resilient core. It overlaps t…
1060
1060 is a high carbon steel for springs, wear parts and tools of moderate duty. It hardens reliably in small sections an…
1065
1065 is a high carbon spring-range steel, close in carbon to GB 65 steel but with the lower manganese of the SAE series.…
1070
1070 is a high carbon steel for springs and cutting/wear applications needing more hardness than 1060/1065 deliver. It i…
1075
1075 is a high carbon steel with slightly lower manganese than 1070/1080, widely traded as spring strip and bar. It take…
1080
1080 sits at the eutectoid carbon level: fully pearlitic when normalized and capable of high hardness after quenching. I…
1084
1084 is a eutectoid-plus high carbon steel popular for blades and springs because its simple chemistry heat treats forgi…
1095
1095 is the highest-carbon steel of the standard SAE bar series: very hard and wear resistant after quenching, but britt…
10B21
10B21 is a boron-treated cold-heading steel: a trace of boron multiplies the hardenability of a 0.20% carbon steel, lett…
1117
1117 is a resulfurized free-machining steel: added sulfur and high manganese give fast, clean cutting while keeping enou…
1137
1137 is a medium carbon, high manganese resulfurized steel combining free-machining behavior with useful strength. It is…
1140
1140 is the resulfurized free-machining counterpart of 1040, with the same carbon class but sulfur added for chip breaki…
1141
1141 pairs 1040-class carbon with 1.35–1.65% manganese and resulfurization, giving free-machining bar with better harden…
1144
1144 is a heavily resulfurized, high manganese carbon steel that reaches high strength in the as-drawn condition while m…
1215
1215 is a rephosphorized and resulfurized free-cutting steel with very low carbon, built purely for machining speed. It …
12L14
12L14 is the leaded free-cutting steel: lead, sulfur and phosphorus together give the highest machinability of any stand…
1524
1524 is a low carbon steel with 1.35–1.65% manganese, giving noticeably better hardenability and core strength than 1020…
1541
1541 upgrades 1040-class carbon with high manganese, the cheapest way to buy hardenability in a plain steel. It is widel…
1566
1566 is a high carbon, high manganese steel for springs and wear parts needing deeper hardening than 1065 provides. Its …
20
20 is China’s GB/T 699 quality carbon steel matching AISI 1020 and JIS S20C — the domestic Chinese designation buyers se…
20Mn
20Mn is the high-manganese variant of grade 20 in GB/T 699: the same low carbon but 0.70–1.00% manganese for higher stre…
25
25 is the GB/T 699 carbon steel between 1020 and 1030 in carbon content, matching AISI 1025 / JIS S25C. A general machin…
30
30 is the GB/T 699 grade matching AISI 1030 / JIS S30C — the first GB carbon grade with useful quench-and-temper respons…
35
35 is the GB/T 699 equivalent of AISI 1035 / JIS S35C, a medium-carbon machinery steel widely stocked in China as round …
40
40 is the GB/T 699 counterpart of AISI 1040 / JIS S40C — a step below 45 (1045) in carbon, chosen where weldability and …
40Mn
40Mn is the GB/T 699 manganese-enhanced version of grade 40 — a low-cost Q&T machinery steel common in Chinese domestic …
50
50 is the GB/T 699 grade matching AISI 1050 and JIS S50C, a higher-carbon machinery steel for parts needing spring-like …
50Mn
50Mn is the GB/T 699 high-manganese counterpart of grade 50, giving better hardenability for Q&T shafts and wear parts a…
55
55 is the GB/T 699 equivalent of AISI 1055 / JIS S55C, bridging machinery and spring applications with plain-carbon econ…
60
60 is the highest-carbon GB/T 699 machinery grade in common trade (AISI 1060 class), used where plain-carbon spring and …
65Mn
65Mn is China’s manganese spring steel (GB/T 1222): a high carbon steel whose 0.90–1.20% manganese buys real through-har…
A283 Gr.C
ASTM A283 Grade C is a low-to-intermediate tensile carbon steel plate intended for general structural and tank work not …
C60
C60 is the EN quality carbon steel (1.0601) equivalent to AISI 1060, specified on European drawings for springs, shafts …
S25C
S25C is the JIS G4051 carbon steel at 0.25% carbon — the Japanese designation matching AISI 1025. It sits between the mi…
S35C
S35C is the JIS medium-carbon steel matching AISI 1035 / EN C35 — the entry point of the genuinely heat-treatable carbon…
S50C
S50C is the JIS medium-carbon steel slightly richer in carbon than S45C/1045, popular in Asian supply chains for machine…
S55C
S55C is the higher-carbon member of the JIS G4051 family (AISI 1055 / EN C55 class), used where a carbon steel must take…
SAE 1020
SAE 1020 is a low-carbon steel for general engineering: easily machined, formed and welded, and the default material for…
SAE 1518
SAE 1518 is a carbon-manganese steel: low carbon like 1020 but with 1.10–1.40% manganese for higher as-rolled strength —…
Y12
Y12 is China’s standard sulfur-phosphorus free-cutting steel (GB/T 8731), the domestic equivalent of the 1215 concept. I…
Y15
Y15 is the higher-carbon companion of Y12 in China’s sulfur-phosphorus free-cutting family (GB/T 8731): the same low-sil…
Y20
Y20 moves China’s free-cutting family (GB/T 8731) to a 0.20% carbon base with sulfur-only chip-breaking (no phosphorus b…
Y30
Y30 is the 0.30% carbon member of the GB/T 8731 free-cutting family: sulfur (0.15–0.25%) keeps it fast on the lathe whil…
Y40Mn
Y40Mn is the top-strength grade of China’s GB/T 8731 free-cutting family: 0.40% carbon with 1.20–1.55% manganese (the co…
See also the Steel equivalent charts.