CHEMICAL RANGE

GRADE	C	Mn	Si	S	P	Cr	Ni	Mo	V
EN-8	0.35 – 0.45	0.60 – 1.00	0.10 – 0.35	0.050 MAX	0.050 MAX	–	–		–
EN-8D	0.40 – 0.45	0.70 – 0.90	0.05 – 0.35	0.060 MAX	0.060 MAX	–	–		–
EN-9	0.50 – 0.60	0.50 – 0.80	0.05 – 0.35	0.040 MAX	0.040 MAX	–	–		–
EN-19	0.35 – 0.45	0.50 – 0.80	0.10 – 0.35	0.04	0.04	0.9-1.4	–	0.2-0.4	–
SAE – 4140	0.38 – 0.43	0.75 – 1.00	0.20 – 0.35	0.035	0.035	0.8-1.1	–	0.15-0.25	–
42CRMO4	0.35 – 0.45	0.50 – 0.80	0.15 – 0.40	0.035	0.035	0.9-1.2	–	0.15-0.3	–
SCM – 435	0.33 – 0.38	0.60 – 0.85	0.15 – 0.35	0.030 MAX	0.030 MAX	0.9-1.2	–	0.15-0.3	–
EN-15	0.30 – 0.40	1.30 – 1.70	0.10 – 0.35	0.040 MAX	0.040 MAX	–	–		–
SAE 1541	0.36 – 0.44	1.35 – 1.65	–	0.050 MAX	0.040 MAX	–	–		–
EN-16	0.30 – 0.40	1.30 – 1.80	0.10 – 0.35	0.04	0.04	–	–	0.2-0.3	–
EN-18	0.35 – 0.45	0.60 – 0.95	0.10 – 0.35	0.04	0.04	0.85-1.15	–		–
41CR4	0.38 – 0.45	0.50 – 0.80	0.15 – 0.40	0.035 MAX	0.035 MAX	0.9-1.2	–		–
EN-25	0.27 – 0.35	0.50 – 0.70	0.10 – 0.35	0.04	0.04	0.50 – 0.8	2.3-2.8	0.4-0.7	–
EN-31	0.90 – 1.20	0.30 – 0.75	0.10 – 0.35	0.04	0.04	1-1.6	–		–
SAE 52100	0.98 – 1.10	0.25 – 0.45	0.15 – 0.30	0.025 MAX	0.025 MAX	1.3-1.6			–
EN-36B	0.12 – 0.18	0.30 – 0.60	0.10 – 0.35	0.04	0.04	0.6-1.1	3-3.75		–
EN-36C	0.12 – 0.18	0.30 – 0.60	0.1-0.35	0.04	0.04	0.6-1.1	3-3.75	0.1-0.25	–
EN-41B	0.35 – 0.45	0.60 MAX	0.1-0.45	0.04	0.04	1.5-1.8	0.40 MAX	0.1-0.25	–
EN-47	0.45 – 0.55	0.50 – 0.80	0.50 MAX	0.04	0.04	0.8-1.2			–
EN-353	0.20 MAX	0.50 – 1.00	0.35 MAX	0.04	0.04	0.75-1.25	1-1.5	0.08-0.15	–
EN-354	0.20 MAX	0.50 – 1.00	0.35 MAX	0.04	0.04	0.75-1.25	1.50 – 2.0	0.1-0.2	–
16MNCR5	0.14 – 0.19	1.00 – 1.30	0.15 – 0.40	0.035 MAX	0.035 MAX	0.8-1.1			–
20MNCR5	0.17 – 0.22	1.10 – 1.40	0.10 – 0.35	0.035	0.035	1-1.3			–
SAE – 4150	0.48 – 0.53	0.75 – 1.00	0.20 – 0.35	0.04	0.04	0.8-1.1		0.15-0.25	–
SAE – 4320	0.17 – 0.22	0.45 – 0.65	0.15 – 0.35	0.035 MAX	0.040 MAX	0.4-0.6	1.65-2	0.20 – 0.30	–
EN-24	0.35 – 0.45	0.45 – 0.70	0.10 – 0.35	0.04	0.04	0.9-1.4	1.3-1.8	0.20 – 0.40	–
SAE – 4340	0.38 – 0.43	0.60 – 0.80	0.15 – 0.35	0.035 MAX	0.040 MAX	0.7-0.9	1.65-2	0.20 – 0.30	–
SAE – 8620	0.18 – 0.23	0.70 – 0.90	0.20 – 0.35	0.04	0.04	0.4-0.6	0.4-0.7	0.15-0.25	–
F – 22	0.15 MAX	0.30 – 0.60	0.40 MAX	0.04	0.04	2-2.5		0.87-1.3	–
17CRNIMO6	0.14 – 0.19	0.40 – 0.60	0.15 – 0.40	0.035 MAX	0.035 MAX	1.5-1.8	1.4-1.7	0.25-0.35	–
A – 105	0.35 MAX	0.60 – 1.05	0.35 MAX	0.050 MAX	0.040 MAX	–			–
CK – 45	0.42 – 0.50	0.50 – 0.80	0.15 – 0.35	0.035 MAX	0.035 MAX	–			–
SCM – 420	0.18 – 0.23	0.60 – 0.85	0.15 – 0.35	0.030 MAX	0.030 MAX	0.9-1.2		0.15-0.3	–
45C8	0.40 – 0.50	0.60 – 0.90	0.10 – 0.35	–	–	–			–
4130	0.28 – 0.33	0.40 – 0.60	0.15 – 0.30	0.035 MAX	0.040 MAX	0.80 – 1.1		0.15-0.25	–
B – 16	0.36 – 0.47	0.45 – 0.70	0.15 – 0.35	0.040 MAX	0.035 MAX	0.8-1.15		0.5-0.65	0.25-0.35

103T3	0.95 – 1.1	0.4	0.1-0.3	0.035	0.035	–	–	–
45C8	0.42-0.5	0.5-0.8	0.1-0.4	0.035	0.035	–	–	–
40NI6CR4MO2	0.38-0.45	0.4-0.7	0.1-0.35	0.035	0.035	0.9-1.3	–	0.1-0.2
17MNCR	0.14-.019	1-1.3	0.1-0.35	0.05	0.05	0.8-1.1	–	–
20MNCR	0.17-0.22	1-1.4	0.1-0.35	0.05	0.05	1-1.3	–	–
40CR1MO28	0.35-0.45	0.5-0.8	0.1-0.35	0.05	0.05	0.9-1.2	–	0.2-0.35
16MN5CR4	0.14-0.19	1-1.3	0.15-0.35	0.035	0.035	0.8-1.1	–	–
20MN5CR5	0.17-0.22	1-1.4	0.15-0.35	0.035	0.035	1-1.3	–	–
20CR 13	0.16-0.25	1	1	0.035	0.04	12-14	–	–
NICKEL200	0.15	0.35	0.35	0.01	–	–	99.0MIN	–
NICKEL201	0.02	0.35	0.35	0.01	–	–	99.0MIN	–
201	0.15	5.5-7.5	1	0.03	0.06	16-18	3.5-5.5	–
202	0.15	7.5-10	1	0.03	0.06	17-19	4-6	–
301	0.15	2	1	0.03	0.045	16-18	6-8	–
302	0.15	2	1	0.03	0.045	17-19	8-10	–
A335-P22	0.05-0.15	0.3-0.6	0.5	0.025	0.025	1.9-2.6	–	0.87-1.13
A335-P 23	0.04-0.01	0.1-0.6	0.5	0.01	0.03	1.9-2.6	–	0.05-0.03
A335-P 91	0.08-0.13	0.3-0.6	0.2-0.5	0.01	0.02	8-9.5	–	0.85-1.05
A439D2	3 MAX	0.70- 1.25	1.5-3	–	0.08	1.75-2.75	18-22	–
S1	0.4-0.55	0.1 -0.4	0.15-1.2	0.03	0.03	1-1.8	–	0.50
L6	0.65-0.7	0.25-0.8	0.1-0.5	0.03	0.03	0.6-1.2	1.25-2	0.50
D2	1.4-1.5	0.2-0.6	0.1- 0.6	0.03	0.03	11-13	–	0.7-1.2
D3	2-2.35	0.2-0.6	0.1-0.6	0.03	0.03	11-13.5	–	–
310 MO	0.08	2.0	1.0	0.03	0.045	24-26	19.22	–
314	0.08	2	1.5-2	0.03	0.04	23-26	19-22	–
316	0.08	2.0	1.0	0.03	0.045	16-18	10-14	–
316H	0.04 -0.1	2.0	1.0	0.03	0.045	16-18	10-14	–
316TI	0.08	2.0	1.0	0.03	0.045	16-18	10-14	–
316L	0.03	2.0	1.0	0.03	0.045	16-18	10-14	–
317	0.08	2.0	1.0	0.03	0.045	18-20	11-15	–
317L	0.03	2.0	1.0	0.03	0.045	18-20	11-15	–
321	0.08	2.0	1.0	0.03	0.045	17-19	9-12	–
321H	0.04-0.1	2.0	1.0	0.03	0.045	17-19	9-12	–
H41	0.6-0.75	0.15-0.4	0.15-0.4	0.03	0.03	3.5-4	–	8.2-9.2
H42	0.55-0.70	0.15-0.4	0.15-0.4	0.03	0.03	3.75-4.5	–	4.5-5.5
H11	0.33-0.43	0.2-0.5	0.2-0.5	0.03	0.03	4.75-5.5	–	1.1-1.6
H12	0.30 -0.40	0.20-0.50	0.20-0.50	0.03	0.03	4.75-5.50	–	1.25-1.75
H13	0.32-0.45	0.2-0.5	0.2-0.5	0.03	0.03	4.75-5.5	–	1.1-1.7

Grades and Materials

GRADES & MATERIALS
MATERIAL No.	GERMANY	UK	FRANCE	USA	RUSSIA
MATERIAL No.	DIN	B.S	AFNOR	ASTM/SAE	GOST
1.5223	42MnV7	–	–	Grade 1340	–
1.6510	39CrNiMo3	816M40	40NCD3	9840	40ChN2MA
1.6511	36CrNiMo4	817M37	35NCD5	4340 9840	–
1.6562	40NiCrMo8-4	817M40	–	4340	–
1.6565	40NiCrMo6		–	4340	–
1.6580	30CrNiMo8	823M30	30NCD8		–
1.6582	34CrNiMo6	817M40, 816M40	34CrNiMo8, 35NCD6	4337, 4340	38Ch2N2MA
1.6773	36NiCrMo16	835M30	35NCD16		–
1.7035	41Cr4	530M40	42C4	5140	40Ch
1.7218	25CrMo4	708A25	25CD4	4130	22ChM
1.7220	34CrMo4	708A37	35CD4	4135, 4137	35ChM
1.7225	42CrMo4	708M40, 709M40	42CD4	4140H	40ChML
1.7228	50CrMo4	708A47	50CrMo4	4150	50Ch
1.7701	52CrMoV4	–	51CDV4		–
1.7707	30CrMoV9	–	–	–	–
1.7709	21CrMoV5-7	–	21CrMoV5-7		–
1.7711	40CrMoV4-6	–	40CrMoV4-6	B16	–
1.8159	51CrV4	735A51	51CV4	6150	50ChGF

TOOL STEELS
MATERIAL No.	GERMANY	UK	FRANCE	USA	RUSSIA
MATERIAL No.	DIN	B.S	AFNOR	ASTM/SAE	GOST
1.2510	100MnCrW4	BO 1	90MnWCrV5	O1	–
1.2842	90MNCrV8, 1.2842	BO 2	90MV8	O2	–
–	–	–	–	S2	–
1.2330	35CrMo4	BP 20	–	P20	–
–	–	–	–	P21	–
–	–	–	–	H13	–

CASE HARDENING STEELS
MATERIAL No.	GERMANY	UK	FRANCE	USA	RUSSIA
MATERIAL No.	DIN	B.S	AFNOR	ASTM/SAE	GOST
1.5752	15NiCr13	–	–	AISI E3310, ASTM A837	–
1.5860	14NiCr18	–	–	–	–
1.5919	15CrNi6	–	–	4320, 4320H	–
1.5920	18CrNi8	–	–	–	–
1.6523	20NiCrMo2-2	805M20, 806M20	20NCD2, 22NCD2	8620	20ChGNM
1.6543	21NiCrMo2-2	805A20	–	8622	–
1.6569	17NiCrMoS6-4	815M70	18NCD2	–	–
1.6587	17CrNiMo6	820A16	18CND6	4820	–
1.7131	16MnCr5	527M17, 590M17	16MC4, 16MC5	5115	18ChG
1.7147	20MnCr5	–	20MC5	5120	20Ch
1.7243	18CrMo4	708M20	18CD4	–	–
1.7325	25MoCr4	–	–	–	–

CREEP RESISTANT STEELS
MATERIAL No.	GERMANY	UK B.S	FRANCE	USA	RUSSIA
MATERIAL No.	DIN	–	AFNOR	ASTM/SAE	GOST
1.5415	16Mo3	–	–	F1	–
1.7335	13CrMo4-4	13CrMo4-5	–	F11	–
1.7337	16CrMo4-4	–	–	F12	–
1.7380	10CrMo9-10	–	–	F22	10Ch2M
1.7390	X15CrMo5-1	–	X15CrMo5-1	F5	–
1.7386	–	X11CrMo9-1	–	F9	–
–	–	–	–	F6	–

ANTI-FRICTION BEARING STEELS
MATERIAL No.	GERMANY	UK	FRANCE	USA	RUSSIA
MATERIAL No.	DIN	B.S	AFNOR	ASTM/SAE	GOST
1.3505	100Cr6	2S135, 535A99	100C6	52100	9Ch1
1.3536	100CrMo7-3	–	–	–	–

STAINLESS STEELS
W. No.	Steel Designation	UK B.S	France AFNOR	USA ASTM / SAE	Russia GOST
1.4024	X5Cr13	403S17	Z12C13	403	–
1.4512	X6CrTi12	409S19	Z8CNT12	409	–
1.4006	X12Cr13	410S21	Z10C13	410	–
1.4005	X12CrS13	416S21	Z20C13	416	–
1.4021	X20Cr13	420S97	Z20C13	420	–
1.4016	X6Cr17	430S15	Z 8 C 17	430	–
1.4104	X14CrMoS17	–	Z8CF17	430F	–
1.4105	X6CrMoS17	–	–	430F	–
1.4057	X17CrNi16-2	431S29	Z15CN 16, 02	431	–
1.4034	X46Cr13	–	–	–	–
1.4028	X30Cr13	420S45	Z30Cr13 / Z33C13	420	–
–	–	–	–	414	–
1.4031	X39Cr13	420545	Z40C13	Type 420	–
1.4122	X39CrMo17-1	–	–	–	–
1.4306	X2CrNi19-11	304 S11	–	304 L	–
1.4305	X8CrNiS18-9	303 S31	–	303	–
1.4404	X2CrNiMo17-12-2	316 S11	–	316L	–
1.4923	X22CrMoV12-1	–	–	–	–

Bar Weights

Diameter (inch)	Lbs Per Inch	Lbs Per Foot	Lbs Per 12 Ft. Bar
1/16	0.001	0.010	0.120
5/64	0.001	0.016	0.190
3/32	0.002	0.023	0.280
7/64	0.003	0.032	0.380
1/8	0.004	0.042	0.500
9/64	0.004	0.053	0.640
5/32	0.005	0.065	0.780
11/64	0.007	0.079	0.950
3/16	0.008	0.094	1.130
13/64	0.009	0.110	1.320
7/32	0.011	0.128	1.540
15/64	0.012	0.147	1.760
1/4	0.014	0.167	2.000
17/64	0.016	0.188	2.256
9/32	0.018	0.211	2.530
19/64	0.019	0.235	2.820
5/16	0.022	0.261	3.130
21/64	0.024	0.287	3.440
11/32	0.026	0.316	3.790
23/64	0.029	0.345	4.140
3/8	0.031	0.376	4.510
25/64	0.034	0.407	4.880
13/32	0.037	0.441	5.290
27/64	0.039	0.475	5.700
7/16	0.043	0.511	6.130
29/64	0.046	0.548	6.576
15/32	0.049	0.587	7.040
31/64	0.052	0.626	7.510
1/2	0.056	0.668	8.020
33/64	0.059	0.710	8.520
17/32	0.063	0.754	9.050
9/16	0.070	0.845	10.140
37/64	0.074	0.892	10.700
19/32	0.078	0.941	11.290
5/8	0.087	1.043	12.520
41/64	0.092	1.096	13.150
21/32	0.096	1.150	13.800
11/16	0.105	1.262	15.140
23/32	0.115	1.379	16.550
3/4	0.125	1.502	18.020
49/64	0.131	1.565	18.780
25/32	0.136	1.630	19.560
13/16	0.147	1.763	21.160
27/32	0.158	1.901	22.810
7/8	0.170	2.044	24.530
57/64	0.177	2.118	25.420
29/32	0.183	2.193	26.320
15/16	0.196	2.347	28.160
31/32	0.209	2.506	30.070
1	0.220	2.670	32.040
1/64	0.230	2.750	33.000
1/16	0.250	3.014	36.170
3/32	0.270	3.194	38.330
1/8	0.280	3.379	40.550
9/64	0.290	3.470	41.640
5/32	0.300	3.570	42.840
3/16	0.310	3.766	45.190
1/4	0.350	4.173	50.080
17/64	0.360	4.276	51.310
9/32	0.370	4.384	52.600
5/16	0.380	4.600	55.200
3/8	0.420	5.049	60.590
13/32	0.440	5.279	63.350
7/16	0.460	5.518	66.220
1/2	0.500	6.008	72.100
17/32	0.520	6.261	75.130
9/16	0.540	6.520	78.240
5/8	0.590	7.051	84.610
11/16	0.640	7.604	91.250
3/4	0.680	8.178	98.140
13/16	0.730	8.773	105.300
7/8	0.780	9.388	112.700
15/16	0.840	10.020	120.200
2	0.890	10.680	128.200
1/16	0.950	11.360	136.300
1/8	1.010	12.060	144.700
3/16	1.070	12.780	153.400
1/4	1.130	13.520	162.200
5/16	1.190	14.280	171.400
3/8	1.260	15.060	180.700
7/16	1.330	15.870	190.400
1/2	1.390	16.690	200.300
9/16	1.460	17.530	210.400
5/8	1.540	18.400	220.800
11/16	1.610	19.290	231.500
3/4	1.690	20.200	242.400
13/16	1.760	21.120	253.400
7/8	1.840	22.070	264.800
15/16	1.920	23.040	276.500
3	2.010	24.030	288.400
1/16	2.090	25.050	300.600
1/8	2.180	26.080	312.900
3/16	2.270	27.130	325.600
1/4	2.360	28.210	338.500
5/16	2.450	29.300	351.600
3/8	2.540	30.420	365.000
7/16	2.640	31.550	378.600
1/2	2.730	32.710	392.500
5/8	2.930	35.090	421.100
11/16	3.030	36.310	435.700
3/4	3.140	37.550	450.600
7/8	3.350	40.100	481.200
15/16	3.450	41.400	496.800
4	3.560	42.730	512.600
1/8	3.790	45.430	545.200
1/4	4.020	48.230	578.700
3/8	4.260	51.110	613.300
7/16	4.390	52.580	630.900
1/2	4.510	54.070	648.900
5/8	4.760	57.120	685.400
3/4	5.030	60.250	723.000
7/8	5.290	63.450	761.000
15/16	5.420	65.100	781.200
5	5.560	66.750	801.100
1/8	5.840	70.130	841.600
1/4	6.130	73.600	883.200
3/8	6.430	77.150	925.700
7/16	6.600	78.950	947.400
1/2	6.730	80.770	969.200
5/8	7.040	84.480	1013.800
3/4	7.360	88.290	1059.000
15/16	7.840	94.140	1130.000
6	8.010	96.120<	–

HARDNESS CONVERSION CHART

TABLE 2A Approximate Hardness Conversion Numbers for Nonaustenitic Steelsˆ
(Rockwell C to other Hardness Numbers)
					Rockwell Superficial Hardness
Rockwell C Scale, 150-kgf Load, Diamond Penetrator	Vickers Hardness Number	Brinell Hardness, 3000-kgf Load, 10-mm Ball	Knoop Hardness, 500-gf Load and Over	Rockwell A Scale, 60-kgf Load, Diamond Penetrator	15N Scale, 15-kgf Load, Diamond Penetrator	30N Scale 30-kgf Load, Diamond Penetrator	45N Scale, 45-kgf Load, Diamond Penetrator	Approximate Tensile Strength, ksi (MPa)
48	484	455	510	74.7	84.5	66.7	52.5	238 (1640)
47	471	442	495	74.1	83.9	65.8	51.4	229 (1580)
46	458	432	480	73.6	83.5	64.8	50.3	221 (1520)
45	446	421	466	73.1	83.0	64.0	49.0	215 (1480)
44	434	409	452	72.5	82.5	63.1	47.8	208 (1430)
43	423	400	438	72.0	82.0	62.2	46.7	201 (1390)
42	412	390	426	71.5	81.5	61.3	45.5	194 (1340)
41	402	381	414	70.9	80.9	60.4	44.3	188 (1300)
40	392	371	402	70.4	80.4	59.5	43.1	182 (1250)
39	382	362	391	69.9	79.9	58.6	41.9	177 (1220)
38	372	353	380	69.4	79.4	57.7	40.8	171 (1180)
37	363	344	370	68.9	78.8	56.8	39.6	166 (1140)
36	354	336	360	68.4	78.3	55.9	38.4	161 (1110)
35	345	327	351	67.9	77.7	55.0	37.2	156 (1080)
34	336	319	342	67.4	77.2	54.2	36.1	152 (1050)
33	327	311	334	66.8	76.6	53.3	34.9	149 (1030)
32	318	301	326	66.3	76.1	52.1	33.7	146 (1010)
31	310	294	318	65.8	75.6	51.3	32.5	141 (970)
30	302	286	311	65.3	75.0	50.4	31.3	138 (950)
29	294	279	304	64.6	74.5	49.5	30.1	135 (930)
28	286	271	297	64.3	73.9	48.6	28.9	131 (900)
27	279	264	290	63.8	73.3	47.7	27.8	128 (880)
26	272	258	284	63.3	72.8	46.8	26.7	125 (860)
25	266	253	278	62.8	72.2	45.9	25.5	123 (850)
24	260	247	272	62.4	71.6	45.0	24.3	119 (820)
23	254	243	266	62.0	71.0	44.0	23.1	117 (810)
22	248	237	261	61.5	70.5	43.2	22.0	115 (790)
21	243	231	256	61.0	69.9	42.3	20.7	112 (770)
20	238	226	251	60.5	69.4	41.5	19.6	110 (760)

TABLE 2B Approximate Hardness Conversion Numbers for Nonaustenitic Steels
(Rockwell B to other Hardness Numbers)
						Rockwell Superficial Hardness
Rockwell B Scale 100-kgf Load 1/16-in. (1.588-mm) Ball	Vickers Hardness Number	Brinell Hardness, 3000-kgf Load, 10-mm Ball	Knoop Hardness, 500-gf Load and Over	Rockwell F Scale, 60-kgf Load, 1/16-in. (1.588-mm) Ball	Rockwell F Scale, 60-kgf Load, 1/16-in. (1.588-mm) Ball	15T Scale, 15-kgf Load, 1/16-in. (1.588-mm) Ball	30T Scale, 30-kgf Load, 1/16-in. (1.588-mm) Ball	45T Scale, 45-kgf Load, 1/16-in. (1.588-mm) Ball	Approximate Tensile Strength ksi (MPa)
100	240	240	251	61.5	…	93.1	83.1	72.9	166 (800)
99	234	234	246	60.9	…	92.8	82.5	71.9	114 (785)
98	228	228	241	60.2	…	92.5	81.8	70.9	109 (750)
97	222	222	236	59.5	…	92.1	81.1	69.9	104 (715)
96	216	216	231	58.9	…	91.8	80.4	68.9	102 (705)
95	210	210	226	58.3	…	91.5	79.8	67.9	100 (690)
94	205	205	221	57.6	…	91.2	79.1	66.9	98 (675)
93	200	200	216	57.0	…	90.8	78.4	65.9	94 (650)
92	195	195	211	56.4	…	90.5	77.8	64.8	92 (635)
91	190	190	206	55.8	…	90.2	77.1	63.8	90 (620)
90	185	185	201	55.2	…	89.9	76.4	62.8	89 (615)
89	180	180	196	54.6	…	89.5	75.8	61.8	88 (605)
88	176	176	192	54.0	…	89.2	75.1	60.8	86 (590)
87	172	172	188	53.4	…	88.9	74.4	59.8	84 (580)
86	169	169	184	52.8	…	88.6	73.8	58.8	83 (570)
85	165	165	180	52.3	…	88.2	73.1	57.8	82 (565)
84	162	162	176	51.7	…	87.9	72.4	56.8	81 (560)
83	159	159	173	51.1	…	87.6	71.8	55.8	80 (550)
82	156	156	170	50.6	…	87.3	71.1	54.8	77 (530)
81	153	153	167	50.0	…	86.9	70.4	53.8	73 (505)
80	150	150	164	49.5	…	86.6	69.7	52.8	72 (495)
79	147	147	161	48.9	…	86.3	69.1	51.8	70 (485)
78	144	144	158	48.4	…	86.0	68.4	50.8	69 (475)
77	141	141	155	47.9	…	85.6	67.7	49.8	68 (470)
76	139	139	152	47.3	…	85.3	67.1	48.8	67 (460)
75	137	137	150	46.8	99.6	85.0	66.4	47.8	66 (455)
74	135	135	147	46.3	99.1	84.7	65.7	46.8	65 (450)
73	132	132	145	45.8	98.5	84.3	65.1	45.8	64 (440)
72	130	130	143	45.3	98.0	84.0	64.4	44.8	63 (435)
71	127	127	141	44.8	97.4	83.7	63.7	43.8	62 (425)
70	125	125	139	44.3	96.8	83.4	63.1	42.8	61 (420)
69	123	123	137	43.8	96.2	83.0	62.4	41.8	60 (415)
68	121	121	135	43.3	95.6	82.7	61.7	40.8	59 (405)
67	119	119	133	42.8	95.1	82.4	61.0	39.8	58(400)

SURFACE ROUGHNESS

Ra (micrometers)	Ra (microinches)	RMS	CLA (N)	Rt	N	Cut-off Length
Ra (micrometers)	Ra (microinches)	RMS	CLA (N)	Rt	N	inch	mm
0.025	1	1.1	1	0.3	1	0.003	0.08
0.05	2	2.2	2	0.5	2	0.01	0.25
0.1	4	4.4	4	0.8	3	0.01	0.25
0.2	8	8.8	8	1.2	4	0.01	0.25
0.4	16	17.6	16	2.0	5	0.01	0.25
0.8	32	32.5	32	4.0	6	0.03	0.8
1.6	63	64.3	63	8.0	7	0.03	0.8
3.2	125	137.5	125	13	8	0.1	2.5
6.3	250	275	250	25	9	0.1	2.5
12.5	500	550	500	50	10	0.1	2.5
25.0	1000	1100	1000	100	11	0.3	8.0
50.0	2000	2200	2000	200	12	0.3	8.0

Ra =		Roughness Average in micrometers or microinches.
RMS =		Root Mean Square in microinches
CLA =		Center Line Average in Microinches
Rt =		Roughness Ttal in microns
N =		New ISO (grade) scale numbers
Порезка =		Length required for sample.

INCHES TO MM

inch	Metric(mm)	inch	Metric(mm)
1/4	6.35	3	76.2
5/16	7.94	3 1/8	79.37
3/8	9.53	3 1/4	82.55
7/16	11.11	3 3/8	85.72
1/2	12.7	3 1/2	88.9
9/16	14.29	3 5/8	92.07
5/8	15.88	3 3/4	95.25
11/16	17.46	3 7/8	98.42
3/4	19.05	4	101.6
13/16	20.64	4 1/8	104.77
7/8	22.23	4 1/4	107.95
15/16	23.81	4 3/8	111.12
1	25.4	4 1/2	114.3
1 1/8	28.57	4 5/8	117.47
1 1/4	31.75	4 3/4	120.65
1 3/8	34.93	4 7/8	123.82
1 1/2	38.1	5	127
1 5/8	41.28	5 1/8	130.17
1 3/4	44.45	5 1/4	133.52
1 7/8	47.63	5 3/8	136.8
2	50.8	5 1/2	139.7
2 1/8	53.97	5 5/8	142.87
2 1/4	57.15	5 3/4	146.05
2 3/8	60.32	5 7/8	149.22
2 1/2	63.5	6	152.4
2 5/8	66.67	6 1/8	155.57
2 3/4	69.85	6 1/4	158.75
2 7/8	73.02	6 3/8	161.92

FEET TO MM

Feet (ft’)	Meter (Mtr)	Feet (ft’)	Meter (Mtr)
1	0.3	21	6.4
2	0.61	22	6.71
3	0.91	23	7.01
4	1.22	24	7.32
5	1.52	25	7.62
6	1.83	26	7.92
7	2.13	27	8.23
8	2.44	28	8.53
9	2.74	29	8.84
10	3.05	30	9.14
11	3.35	31	9.45
12	3.66	32	9.75
13	3.96	33	10.06
14	4.27	34	10.36
15	4.57	35	10.67
16	4.88	36	10.97
17	5.18	37	11.28
18	5.49	38	11.58
19	5.79	39	11.89
20	6.1	40	12.19

Technical Information

CHEMICAL RANGE

Grades and Materials

Bar Weights

HARDNESS CONVERSION CHART

SURFACE ROUGHNESS

INCHES TO MM

FEET TO MM

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